<Page>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                            ------------------------

                                   FORM 10-Q

(MARK ONE)

<Table>
        
   /X/       QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

           For the quarterly period ended September 30, 2001

                                  OR

   / /         TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                   For the transition period from to

                   Commission File Number: 333-20095
</Table>

                            ------------------------

                             ATRIUM COMPANIES, INC.

             (Exact name of registrant as specified in its charter)

<Table>
                                            
               DELAWARE                                     75-2642488
    (State or other jurisdiction of                      (I.R.S. Employer
    incorporation or organization)                    Identification Number)
</Table>

     1341 W. MOCKINGBIRD LANE, SUITE 1200W, DALLAS, TEXAS 75247, (214) 630-5757

          (Address of principal executive offices, including zip code
                   and telephone number, including area code)

                            ------------------------

    Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes /X/  No / /

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<Page>
                             ATRIUM COMPANIES, INC.
                                   FORM 10-Q
                        QUARTER ENDED SEPTEMBER 30, 2001
                                     INDEX

<Table>
<Caption>
                                                                                        PAGE
                                                                                      --------
                                                                                
PART I.  FINANCIAL INFORMATION

Item 1.                 Consolidated Financial Statements (Unaudited):

                        Consolidated Balance Sheets as of September 30, 2001 and
                          December 31, 2000.........................................        3

                        Consolidated Statements of Operations for the Three Months
                          Ended September 30, 2001 and 2000.........................        4

                        Consolidated Statements of Operations for the Nine Months
                          Ended September 30, 2001 and 2000.........................        5

                        Consolidated Statement of Stockholder's Equity for the Nine
                          Months Ended September 30, 2001...........................        6

                        Consolidated Statements of Cash Flows for the Nine Months
                          Ended September 30, 2001 and 2000.........................        7

                        Notes to Consolidated Financial Statements..................     8-25

Item 2.                 Management's Discussion and Analysis of Financial Condition
                          and Results of Operations.................................    26-29

Item 3.                 Quantitative and Qualitative Disclosures about Market
                          Risk......................................................    30-31

PART II.  OTHER INFORMATION

Item 1.                 Legal Proceedings...........................................       32

Items 2, 3, 4 and 5 are not applicable

Item 6.                 Exhibits and Reports on Form 8-K............................       32

Signatures..........................................................................       33
</Table>

                                       2
<Page>
                             ATRIUM COMPANIES, INC.

                          CONSOLIDATED BALANCE SHEETS

                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)

<Table>
<Caption>
                                                              SEPTEMBER 30,   DECEMBER 31,
                                                                  2001            2000
                                                              -------------   ------------
                                                               (UNAUDITED)
                                                                        
                           ASSETS
CURRENT ASSETS:
  Cash and cash equivalents.................................    $  7,168        $  4,646
  Accounts receivable, net..................................       4,119          51,239
  Retained interest in sold accounts receivable.............      28,151              --
  Inventories...............................................      48,135          45,955
  Prepaid expenses and other current assets.................       3,324           2,958
  Deferred tax asset........................................       1,187           2,000
                                                                --------        --------
    Total current assets....................................      92,084         106,798
PROPERTY, PLANT AND EQUIPMENT, net..........................      59,275          54,640
GOODWILL, net...............................................     347,915         356,674
DEFERRED FINANCING COSTS, net...............................      15,183          16,644
OTHER ASSETS................................................       8,140           7,579
                                                                --------        --------
    Total assets............................................    $522,597        $542,335
                                                                ========        ========

            LIABILITIES AND STOCKHOLDER'S EQUITY

CURRENT LIABILITIES:
  Current portion of notes payable..........................    $  5,535        $  6,211
  Accounts payable..........................................      34,119          28,482
  Accrued liabilities.......................................      30,129          33,104
                                                                --------        --------
    Total current liabilities...............................      69,783          67,797
                                                                --------        --------
LONG-TERM LIABILITIES:
 Notes payable..............................................     320,366         349,137
  Deferred tax liability....................................       1,187           2,000
  Other long-term liabilities...............................         984           1,325
  Swaps contract liability..................................       8,865              --
                                                                --------        --------
    Total long-term liabilities.............................     331,402         352,462
                                                                --------        --------
    Total liabilities.......................................     401,185         420,259
                                                                --------        --------
COMMITMENTS AND CONTINGENCIES

STOCKHOLDER'S EQUITY:
  Common stock $.01 par value, 3,000 shares authorized, 100
    shares issued and outstanding...........................          --              --
  Paid-in capital...........................................     204,012         196,004
  Retained earnings (accumulated deficit)...................     (73,817)        (73,928)
  Accumulated other comprehensive income (loss).............      (8,783)             --
                                                                --------        --------
    Total stockholder's equity..............................     121,412         122,076
                                                                --------        --------
      Total liabilities and stockholder's equity............    $522,597        $542,335
                                                                ========        ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       3
<Page>
                             ATRIUM COMPANIES, INC.

                     CONSOLIDATED STATEMENTS OF OPERATIONS

             FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2001 AND 2000
                             (DOLLARS IN THOUSANDS)
                                  (UNAUDITED)

<Table>
<Caption>
                                                                2001       2000
                                                              --------   --------
                                                                   
NET SALES...................................................  $140,846   $113,321
COST OF GOODS SOLD..........................................    93,653     91,784
                                                              --------   --------
  Gross profit..............................................    47,193     21,537
                                                              --------   --------

OPERATING EXPENSES:
Selling, delivery, general and administrative expenses
  (excluding stock compensation, securitization and
  amortization expense).....................................    30,981     32,240
Stock compensation expense..................................      (207)        --
Securitization expense......................................     1,165         --
Amortization expense........................................     3,619      2,077
                                                              --------   --------
SELLING, DELIVERY, GENERAL AND ADMINISTRATIVE EXPENSES......    35,558     34,317
Special charges.............................................       136        125
                                                              --------   --------
                                                                35,694     34,442
                                                              --------   --------
  Income (loss) from operations.............................    11,499    (12,905)

INTEREST EXPENSE............................................     9,459      9,216
OTHER INCOME (EXPENSE), net.................................       (76)       607
                                                              --------   --------
Income (loss) before income taxes...........................     1,964    (21,514)
PROVISION (BENEFIT) FOR INCOME TAXES........................       389     (6,845)
                                                              --------   --------
NET INCOME (LOSS)...........................................  $  1,575   $(14,669)
                                                              ========   ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       4
<Page>
                             ATRIUM COMPANIES, INC.

                     CONSOLIDATED STATEMENTS OF OPERATIONS

             FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2001 AND 2000
                             (DOLLARS IN THOUSANDS)
                                  (UNAUDITED)

<Table>
<Caption>
                                                                2001       2000
                                                                ----     --------
                                                                   
NET SALES...................................................  $396,958   $383,395
COST OF GOODS SOLD..........................................   267,453    291,961
                                                              --------   --------
  Gross profit..............................................   129,505     91,434
                                                              --------   --------

OPERATING EXPENSES:
Selling, delivery, general and administrative expenses
  (excluding stock compensation, securitization and
  amortization expense).....................................    86,820     96,025
Stock compensation expense..................................       506         --
Securitization expense......................................     1,165         --
Amortization expense........................................    10,752      6,687
                                                              --------   --------
SELLING, DELIVERY, GENERAL AND ADMINISTRATIVE EXPENSES......    99,243    102,712
Special charges.............................................       275     25,708
                                                              --------   --------
                                                                99,518    128,420
                                                              --------   --------
  Income (loss) from operations.............................    29,987    (36,986)

INTEREST EXPENSE............................................    28,967     26,945
OTHER INCOME (EXPENSE), net.................................       (10)     1,441
                                                              --------   --------
  Income (loss) before income taxes.........................     1,010    (62,490)
PROVISION (BENEFIT) FOR INCOME TAXES........................       899    (15,326)
                                                              --------   --------
NET INCOME (LOSS)...........................................  $    111   $(47,164)
                                                              ========   ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       5
<Page>
                             ATRIUM COMPANIES, INC.
                           CONSOLIDATED STATEMENT OF
                              STOCKHOLDER'S EQUITY
                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2001
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

<Table>
<Caption>
                                                                            RETAINED      ACCUMULATED
                                           COMMON STOCK                     EARNINGS         OTHER           TOTAL
                                       ---------------------   PAID-IN    (ACCUMULATED   COMPREHENSIVE   STOCKHOLDER'S
                                        SHARES      AMOUNT     CAPITAL      DEFICIT)     INCOME (LOSS)      EQUITY
                                       --------   ----------   --------   ------------   -------------   -------------
                                                                                       
Balance, December 31, 2000...........    100      $      --    $196,004     $(73,928)       $    --        $122,076
                                         ---      ----------   --------     --------        -------        --------
  Comprehensive income (loss):
    Net income (loss)................     --             --          --          111             --             111
    Cumulative effect of change in
      accounting principle, net of
      tax of $0 (adoption of
      SFAS 133--see note 2)..........     --             --          --           --         (2,319)         (2,319)
    Net fair market value adjustment
      of derivative instruments, net
      of tax of $0...................     --             --          --           --         (6,218)         (6,218)
    Accretion of deferred gain on
      terminated interest rate
      collars........................     --             --          --           --           (246)           (246)
                                         ---      ----------   --------     --------        -------        --------
    Comprehensive income (loss)......     --             --          --          111         (8,783)         (8,672)
  Net contribution from Atrium
    Corporation......................     --             --       8,008           --             --           8,008
                                         ---      ----------   --------     --------        -------        --------
Balance, September 30, 2001..........    100      $      --    $204,012     $(73,817)       $(8,783)       $121,412
                                         ===      ==========   ========     ========        =======        ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       6
<Page>
                             ATRIUM COMPANIES, INC.
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
             FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2001 AND 2000
                             (DOLLARS IN THOUSANDS)
                                  (UNAUDITED)

<Table>
<Caption>
                                                                2001       2000
                                                              --------   --------
                                                                   
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss).........................................  $    111   $(47,164)
  Adjustments to reconcile net income (loss) to net cash
    used in operating activities:
    Depreciation and amortization...........................    18,099     11,416
    Amortization of deferred financing costs................     1,924      1,754
    Accretion of debt discount..............................       137        123
    Accretion of gain from interest rate collars............      (246)      (245)
    Amortization of gain from sale/leaseback of building....        (5)        --
    Loss (gain) on sales of assets..........................        17       (693)
    Gain on sale of equity securities.......................        --       (507)
    Non cash special charge.................................        --     25,708
    Provision for bad debts.................................       927      2,229
    Deferred tax provision (benefit)........................        --    (15,775)
    Changes in assets and liabilities:
      Assets held for sale..................................        --        460
      Accounts receivable...................................   (10,664)      (496)
      Sale of accounts receivable...........................    27,800         --
      Inventories...........................................    (2,180)    18,423
      Prepaid expenses and other current assets.............      (442)     8,201
      Accounts payable......................................     2,469     (2,181)
      Accrued liabilities...................................    (2,983)     3,279
                                                              --------   --------
          Net cash provided by operating activities.........    34,964      4,532
                                                              --------   --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of property, plant and equipment................   (12,100)   (10,924)
  Proceeds from sales of assets.............................       101      2,801
  Transfer to restricted cash...............................        --    (23,930)
  Net proceeds from divestitures of Wing and Atrium Wood
    fixed assets............................................        --      6,382
  Proceeds from sale of equity securities...................        --        620
  Increase in other assets..................................    (1,648)    (3,441)
                                                              --------   --------
          Net cash used in investing activities.............   (13,647)   (28,492)
                                                              --------   --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Net (payments) borrowings under revolving credit
    facility................................................    (5,000)    16,230
  Principal payments on term loans..........................   (24,354)    (1,500)
  Contribution from Atrium Corporation, net.................     8,008      5,327
  Payments of other notes payable...........................      (230)      (233)
  Increase in checks drawn in excess of book balances.......     3,169      6,659
  Capitalized deferred financing costs......................      (388)      (426)
                                                              --------   --------
          Net cash provided by (used in) financing
             activities.....................................   (18,795)    26,057
                                                              --------   --------
NET INCREASE IN CASH AND CASH EQUIVALENTS...................     2,522      2,097
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD..............     4,646      1,294
                                                              --------   --------
CASH AND CASH EQUIVALENTS, END OF PERIOD....................  $  7,168   $  3,391
                                                              ========   ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       7
<Page>
                             ATRIUM COMPANIES, INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

1. BASIS OF PRESENTATION:

    The unaudited consolidated financial statements of Atrium Companies, Inc.
(the "Company") for the three months and nine months ended September 30, 2001
and 2000, and financial position as of September 30, 2001 and December 31, 2000
have been prepared in accordance with generally accepted accounting principles
for interim financial reporting, the instructions to Form 10-Q and Rule 10-01 of
Regulation S-X. Accordingly, they do not include all of the information and
footnotes required by generally accepted accounting principles for complete
financial statements.

    These consolidated financial statements and footnotes should be read in
conjunction with the Company's audited financial statements for the fiscal year
ended December 31, 2000 included in the Company's Form 10-K as filed with the
Securities and Exchange Commission on April 2, 2001. In the opinion of
management, all adjustments (consisting of normal recurring adjustments)
considered necessary for a fair presentation of the interim financial
information have been included. The results of operations for any interim period
are not necessarily indicative of the results of operations for a full year.

NEW ACCOUNTING PRONOUNCEMENT

    In September 2000, the FASB issued SFAS No. 140, "Accounting for Transfers
and Servicing of Financial Assets and Extinguishments of Liabilities, a
replacement of SFAS No. 125." SFAS No. 140 revised the standards for accounting
for securitizations and other transfers of financial assets and collateral and
requires certain disclosures. SFAS No. 140 is effective for transfers and
servicing of financial assets and extinguishments of liabilities occurring after
June 30, 2001. The Company adopted SFAS No. 140 in the third quarter upon
consummation of the asset securitization transaction discussed in Note 3.

    In July 2001, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standard SFAS No. 141, "Business Combination," and SFAS
No. 142, "Goodwill and Other Intangible Assets." SFAS No. 141 requires all
business combinations initiated after June 30, 2001 be accounted for using the
purchase method. Additionally, SFAS No. 141 establishes specific criteria for
the recognition of intangible assets separately from goodwill. SFAS No. 142
primarily addresses the accounting for goodwill and intangible assets subsequent
to their acquisition and is effective for the Company on January 1, 2002. The
most significant changes made by SFAS No.142 require that goodwill and
indefinite lived intangible assets no longer be amortized and be tested for
impairment at least on an annual basis. Additionally, the amortization period of
intangible assets with finite lives will no longer be limited to forty years.

    The Company is currently assessing the impact of SFAS No. 141 and No. 142
and has not yet determined the effects these statements will have on its
consolidated financial position or results of operations.

    In August 2001, the FASB issued SFAS No. 143, "Accounting for Asset
Retirement Obligations." SFAS No. 143 addresses financial accounting and
reporting for obligations associated with the retirement of tangible long-lived
assets and the associated asset retirement costs. SFAS No. 143 is effective for
the Company on January 1, 2003. The Company is currently assessing the impact of
SFAS

                                       8
<Page>
                             ATRIUM COMPANIES, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

1. BASIS OF PRESENTATION: (CONTINUED)
No. 143 and has not yet determined the effects, if any, it will have on its
consolidated financial position or results of operations.

    In October 2001, the FASB issued SFAS No. 144, "Accounting for the
Impairment or Disposal of Long-Lived Assets." SFAS No. 144 addresses financial
accounting and reporting for the impairment or disposal of long-lived assets.
SFAS No. 144 is effective for the Company on January 1, 2002. The Company is
currently assessing the impact of SFAS No. 144 and has not yet determined the
effects, if any, it will have on its consolidated financial position or results
of operations.

PRO FORMA RESULTS

    The statement of operations for 2000 only includes the operations of certain
acquisitions and divestitures from the date they were acquired or divested by
the Company. The Ellison Company, Inc.'s Windows and Doors Division and Ellison
Extrusion Systems, Inc. (collectively "Ellison") are included since their date
of acquisition, October 25, 2000, and the Wing Industries, Inc. ("Wing") and
Atrium Wood Patio Door ("Wood") divestitures are excluded since their
dispositions on August 25, 2000 and August 30, 2000, respectively.

    The following unaudited pro forma information presents consolidated
operating results as though the acquisition of Ellison and the divestitures of
the Wing and Wood divisions had occurred at the beginning of the periods
presented. For the three and nine month periods ended September 30, 2001, there
is no difference between the actual and pro forma information because the
acquisitions have been included in operations for the full periods and the
divestitures have been excluded from operations for the full periods.

<Table>
<Caption>
                                                               NINE MONTHS
                                                                  ENDED           NINE MONTHS
                                                              SEPTEMBER 30,          ENDED
                                                                  2001         SEPTEMBER 30, 2000
                                                              -------------   --------------------
                                                                 ACTUAL        ACTUAL    PRO FORMA
                                                              -------------   --------   ---------
                                                                                
NET SALES...................................................    $396,958      $383,395   $377,754
COST OF GOODS SOLD..........................................     267,453       291,961    250,241
                                                                --------      --------   --------
  Gross profit..............................................     129,505        91,434    127,513
                                                                --------      --------   --------

OPERATING EXPENSES:
Selling, delivery, general and administrative expenses
  (excluding stock compensation, securitization and
  amortization expense).....................................      86,820        96,025     84,461
Stock compensation expense..................................         506            --        576
Securitization expense......................................       1,165            --         --
Amortization expense........................................      10,752         6,687     10,752
                                                                --------      --------   --------
SELLING, DELIVERY, GENERAL AND ADMINISTRATIVE EXPENSES......      99,243       102,712     95,789
Special charges.............................................         275        25,708         --
                                                                --------      --------   --------
                                                                  99,518       128,420     95,789
                                                                --------      --------   --------
  Income (loss) from operations.............................      29,987       (36,986)    31,724
</Table>

                                       9
<Page>
                             ATRIUM COMPANIES, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

1. BASIS OF PRESENTATION: (CONTINUED)

<Table>
<Caption>
                                                               NINE MONTHS
                                                                  ENDED           NINE MONTHS
                                                              SEPTEMBER 30,          ENDED
                                                                  2001         SEPTEMBER 30, 2000
                                                              -------------   --------------------
                                                                 ACTUAL        ACTUAL    PRO FORMA
                                                              -------------   --------   ---------
                                                                                
INTEREST EXPENSE............................................      28,967        26,945     28,967
OTHER INCOME, net...........................................         (10)        1,441      1,279
                                                                --------      --------   --------
  Income (loss) before income taxes.........................       1,010       (62,490)     4,036
PROVISION (BENEFIT) FOR INCOME TAXES........................         899       (15,326)     4,055
                                                                --------      --------   --------
NET INCOME (LOSS)...........................................    $    111      $(47,164)  $    (19)
                                                                ========      ========   ========

Other Information:
Depreciation expense........................................    $  7,346      $  4,730   $  5,858
                                                                ========      ========   ========
Ellison corporate service charge............................    $     --      $     --   $  1,400
                                                                ========      ========   ========
</Table>

<Table>
<Caption>
                                                                  THREE
                                                                 MONTHS
                                                                  ENDED           THREE MONTHS
                                                              SEPTEMBER 30,          ENDED
                                                                  2001         SEPTEMBER 30, 2000
                                                              -------------   --------------------
                                                                 ACTUAL        ACTUAL    PRO FORMA
                                                              -------------   --------   ---------
                                                                                
NET SALES...................................................    $140,846      $113,321   $136,958
COST OF GOODS SOLD..........................................      93,653        91,784     91,998
                                                                --------      --------   --------
  Gross profit..............................................      47,193        21,537     44,960
                                                                --------      --------   --------

OPERATING EXPENSES:
Selling, delivery, general and administrative expenses
  (excluding stock compensation, securitization and
  amortization expense).....................................      30,981        32,240     30,098
Stock compensation expense..................................        (207)           --        576
Securitization expense......................................       1,165            --         --
Amortization expense........................................       3,619         2,077      3,619
                                                                --------      --------   --------
SELLING, DELIVERY, GENERAL AND ADMINISTRATIVE EXPENSES......      35,558        34,317     34,293
Special charges.............................................         136           125         --
                                                                --------      --------   --------
                                                                  35,694        34,442     34,293
                                                                --------      --------   --------
  Income from operations....................................      11,499       (12,905)    10,667
INTEREST EXPENSE............................................       9,459         9,216      9,459
OTHER INCOME, net...........................................         (76)          607        601
                                                                --------      --------   --------
  Income (loss) before income taxes.........................       1,964       (21,514)     1,809
PROVISION (BENEFIT) FOR INCOME TAXES........................         389        (6,845)     1,533
                                                                --------      --------   --------
NET INCOME (LOSS)...........................................    $  1,575      $(14,669)  $    276
                                                                ========      ========   ========

Other Information:
Depreciation expense........................................    $  2,617      $  1,533   $  2,037
                                                                ========      ========   ========
Ellison corporate service charge............................    $     --      $     --   $    526
                                                                ========      ========   ========
</Table>

                                       10
<Page>
                             ATRIUM COMPANIES, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

2. ADOPTION OF SFAS NO. 133--ACCOUNTING FOR DERIVATIVE INSTRUMENTS AND HEDGING
ACTIVITIES:

   The Company adopted SFAS No. 133, Accounting for Derivative Instruments and
Hedging Activities, and the corresponding amendments on January 1, 2001. In
accordance with the transition provisions of SFAS 133, the Company recorded a
cumulative-effect adjustment as of January 1, 2001 of $2,319 to other
comprehensive income. This adjustment represents the current fair-value of
hedging instruments related to interest rate swap agreements of $2,646 with an
offset of $327 related to the reclassification of deferred gains on previously
terminated interest rate collars. There is no income tax effect considering
there is a full valuation allowance against deferred tax assets.

    At September 30, 2001, the fair-value of the hedging instruments is a
liability of $8,865 and is included in other comprehensive income and long-term
liabilities.

    The Company is exposed to credit-related losses in the event of
nonperformance by counterparties to financial instruments, but it expects all
counterparties to meet their obligations given their high credit ratings.

    The Company, as part of its risk management program, is party to interest
rate swap agreements for the purpose of hedging its exposure to floating
interest rates on certain portions of its debt. As of September 30, 2001, the
Company had $141,620 of notional amount in outstanding interest rate swaps with
third parties. The maximum length of the interest rate swaps currently in place
as of September 30, 2001 is approximately 2 1/4 years.

    All derivatives are recognized on the balance sheet at their fair-value. On
the date that the Company enters into a derivative contract, it designates the
derivative as a hedge of (a) a forecasted transaction or (b) the variability of
cash flows that are to be received or paid in connection with a recognized asset
or liability (a "cash flow" hedge). Changes in the fair-value of a derivative
that is highly effective as--and that is designated and qualifies as--a cash
flow hedge, to the extent that the hedge is effective, are recorded in other
comprehensive income, until earnings are affected by the variability of cash
flows of the hedged transaction (e.g., until periodic settlements of a
variable-rate asset or liability are recorded in earnings). Any hedge
ineffectiveness (which represents the amount by which the changes in the
fair-value of the derivative exceed the variability in the cash flows of the
forecasted transaction) is recorded in current-period earnings. As of
September 30, 2001, all hedges outstanding were highly effective.

    The Company formally documents all relationships between hedging instruments
and hedge items, as well as its risk-management objective and strategy for
undertaking various hedge transactions. This process includes linking all
derivatives that are designated as fair-value or cash flow hedges to
(1) specific assets and liabilities on the balance sheet or (2) specific firm
commitments or forecasted transactions. The Company also formally assesses (both
at the hedge's inception and on an ongoing basis) whether the derivatives that
are used in hedging transactions have been highly effective in offsetting
changes in the fair value or cash flows of hedged items and whether those
derivatives may be expected to remain highly effective in future periods. When
it is determined that a derivative is not (or has ceased to be) highly effective
as a hedge, the Company discontinues hedge accounting prospectively, as
discussed below.

                                       11
<Page>
                             ATRIUM COMPANIES, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

2. ADOPTION OF SFAS NO. 133--ACCOUNTING FOR DERIVATIVE INSTRUMENTS AND HEDGING
ACTIVITIES: (CONTINUED)
    The Company discontinues hedge accounting prospectively when (1) it
determines that the derivative is no longer effective in offsetting changes in
the fair-value or cash flows of a hedge item (including hedged items such as
firm commitments or forecasted transactions); (2) the derivative expires or is
sold, terminated, or exercised; (3) it is no longer probable that the forecasted
transaction will occur; or (4) management determines that designating the
derivative as a hedging instrument is no longer appropriate.

    When the Company discontinues hedge accounting because it is no longer
probable that the forecasted transaction will occur in the originally expected
period, the gain or loss on the derivative remaining in accumulated other
comprehensive income is reclassified into earnings. In all situations in which
hedge accounting is discontinued and the derivative remains outstanding, the
Company will carry the derivative at its fair-value on the balance sheet,
recognizing changes in the fair-value in current-period earnings.

3. SECURITIZATION OF ACCOUNTS RECEIVABLE:

    On July 31, 2001, the Company and certain of its subsidiaries (collectively
"the Originators") entered into an agreement whereby each Originator agreed to
sell on a non-recourse basis, and on an ongoing basis, a pool of receivables
comprising their entire trade receivable portfolio to a wholly owned
bankruptcy-remote special purpose funding subsidiary ("Atrium Funding
Corporation" or "AFC") of the Company. AFC is a distinct legal entity that
engages in no trade or business in order to make remote the possibility that it
would enter bankruptcy or other receivership and is consolidated for financial
purposes. On July 31, 2001, AFC entered into an agreement with Fairway Finance
Corp. ("the Securitization Company"), agented by BMO Nesbitt Burns, whereby AFC
sold a pro rata share of the trade receivable portfolio to the Securitization
Company for aggregate payments of up to $50,000, subject to a borrowing base.

    Generally, the agreement provides that as payments are collected from the
sold accounts receivable, AFC may elect to have the Securitization Company
reinvest the proceeds in new accounts receivable. The Securitization Company, in
addition to the right to collect payments from that portion of the interests in
the accounts receivable owned by them, also have the right to collect payments
from that portion of the ownership interest in the accounts receivable that is
owned by AFC. In calculating the fair market value of the Company's retained
interest in the receivables, the book value of the receivables represented the
best estimate of the fair market value due to the current nature of these
receivables. The facility, which expires July 31, 2004, requires the Company to
comply with various affirmative or negative covenants and requires early
amortization if AFC does not maintain a minimum equity requirement. The facility
also terminates on the occurrence and failure to cure certain events, including,
among other things, any failure of AFC to maintain certain ratios related to the
collectability of the receivables, or the Company's failure to maintain
long-term unsecured debt ratios. The Company and AFC are in compliance with all
related covenants as of September 30, 2001.

                                       12
<Page>
                             ATRIUM COMPANIES, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

3. SECURITIZATION OF ACCOUNTS RECEIVABLE: (CONTINUED)
    The receivables sold to the Securitization Company are thus not reflected in
the Company's consolidated balance sheet. The Securitization Company is free to
pledge or exchange its interest. Any receivables not sold to the Securitization
Company constitute the retained interest in the receivables portfolio of AFC. On
August 3, 2001, AFC sold a pro rata share of the trade receivable portfolio for
$33,000, leaving a retained interest of $28,055. Subsequently, additional pools
of receivables were sold. As of September 30, 2001 the retained interest was
$28,151. The amount the Company received from the sale was net of provisions for
bad debt and transaction fees, which included placement fees and professional
fees of approximately $840. The proceeds from the sale were used to repay debt
under the Company's Senior Credit Facility.

    The Company retains the servicing responsibilities for which it receives an
annual servicing fee of .5% of the securitized accounts receivables. The Company
recognizes no servicing asset or liability because the servicing fee represents
adequate compensation for the services performed.

    The table below summarizes certain cash flow information:

<Table>
<Caption>
                                                              SEPTEMBER 30,
                                                                  2001
                                                              -------------
                                                           
Proceeds from new securitizations...........................     $87,768
Proceeds from collections reinvested........................      88,890
</Table>

    Managed portfolio data:

<Table>
<Caption>
                                                              SEPTEMBER 30,
                                                                  2001
                                                              -------------
                                                           
Securitized balances........................................     $27,800
Retained interest in sold accounts receivable...............      28,151
Owned receivables...........................................       4,119
                                                                 -------
Managed receivables.........................................     $60,070
                                                                 =======
</Table>

    During the third quarter of 2001, the Company incurred costs of $1,165 on
the sale of its receivables that have been classified as a separate line item in
selling, delivery and general and administrative expenses. These costs were
comprised of $840 of fees associated with the placement of the securitization
and a loss on the sale of receivables of $325.

                                       13
<Page>
                             ATRIUM COMPANIES, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

4. INVENTORIES:

    Inventories are valued at the lower of cost or market using the last-in,
first-out (LIFO) method of accounting. Work-in-process and finished goods
inventories consist of materials, labor and manufacturing overhead. Inventories
consisted of the following:

<Table>
<Caption>
                                                              SEPTEMBER 30,   DECEMBER 31,
                                                                  2001            2000
                                                              -------------   ------------
                                                                        
Raw materials...............................................     $32,974         $31,785
Work-in-process.............................................       1,330             671
Finished goods..............................................      14,025          14,312
                                                                 -------         -------
                                                                  48,329          46,768
LIFO reserve................................................        (194)           (813)
                                                                 -------         -------
                                                                 $48,135         $45,955
                                                                 =======         =======
</Table>

5.  NOTES PAYABLE:

    Notes payable consisted of the following:

<Table>
<Caption>
                                                              SEPTEMBER 30,   DECEMBER 31,
                                                                  2001            2000
                                                              -------------   ------------
                                                                        
Revolving credit facility...................................    $ 14,000        $ 19,000
Term loan A.................................................       8,999          13,070
Term loan B.................................................      60,260          69,720
Term loan C.................................................      69,827          80,650
Senior subordinated notes...................................     175,000         175,000
Other.......................................................          49             279
                                                                --------        --------
                                                                 328,135         357,719
Less:
Unamortized debt discount...................................      (2,234)         (2,371)
Current portion of notes payable............................      (5,535)         (6,211)
                                                                --------        --------
  Long-term debt............................................    $320,366        $349,137
                                                                ========        ========
</Table>

    The Credit Agreement requires the Company to meet certain financial tests
pertaining to, interest coverage, fixed charge coverage and leverage. On
May 15, 2001 and July 20, 2001, the Company amended its Credit Agreement with
Amendments No. 1 and No. 2 (collectively "the Amendments"). The Amendments
permit the Company to enter into certain transactions including an accounts
receivable securitization and the sale of specific assets, and accordingly,
adjust covenants for the transactions. As of September 30, 2001, the Company was
in compliance with all related covenants.

                                       14
<Page>
                             ATRIUM COMPANIES, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

6. CONTINGENCIES:

    The Company is party to various claims, legal actions and complaints arising
in the ordinary course of business. In the opinion of management, all such
matters are without merit or are of such kind, or involve such amounts, that an
unfavorable disposition would not have a material effect on the consolidated
financial position, results of operations or liquidity of the Company.

    In 1995, various Dallas-based factory employees became members of the
Amalgamated Clothing and Textile Workers Union. On May 25, 2001, the Company
entered into a renewed collective bargaining agreement which expires in
May 2004. In addition, in connection with its Woodville, Texas operations, the
Company is party to a renewed collective bargaining arrangement due to expire in
September 2004. The agreements cover approximately 1,200 of the Company's
employees.

    The Company is involved in various stages of investigation and cleanup
related to environmental protection matters, some of which relate to waste
disposal sites. The potential costs related to such matters and the possible
impact thereof on future operations are uncertain due in part to: the
uncertainty as to the extent of pollution; the complexity of Government laws and
regulations and their interpretations; the varying costs and effectiveness of
alternative cleanup technologies and methods; the uncertain level of insurance
or other types of recovery; and the questionable level of the Company's
involvement. The Company was named in 1988 as a potentially responsible party
("PRP") in two superfund sites pursuant to the Comprehensive Environmental
Response Compensation and Liability Act of 1980, as amended (the Chemical
Recycling, Inc. site in Wylie, Texas, and the Diaz Refinery site in Little Rock,
Arkansas). The Company believes that based on the information currently
available, including the substantial number of other PRP's and relatively small
share allocated to it at such sites, its liability, if any, associated with
either of these sites will not have a material adverse effect on the Company's
consolidated financial position, results of operations or liquidity.

    Atrium previously owned one parcel of real estate that requires future costs
related to environmental clean-up. The estimated costs of clean-up have been
reviewed by third-party sources and are expected not to exceed $150. The
previous owner of the property has established an escrow of $400 to remediate
the associated costs. This property was sold by Atrium in December 1999. The
Company has established a letter of credit of $250 to cover any costs of
remediation exceeding the previous owner's escrow. The Company believes the
existing escrow amount is adequate to cover costs associated with this clean-up.
No additional liabilities are believed to exist in regards to the Company's
remaining operations.

7. SUBSIDIARY GUARANTORS:

    The term Wing collectively refers to Wing Industries, Inc. and its direct
parent, Wing Industries Holdings, Inc. The term Darby collectively refers to
R.G. Darby Company, R.G. Darby Company-South, Total Trim, Inc. and Total
Trim-South. The term Heat refers to Heat, Inc., H.I.G. Vinyl, Inc., Thermal
Industries, Inc. and Best Built, Inc.

    In connection with the Company's Senior Subordinated Notes due 2009, the
Company's payment obligations under the Notes are fully and unconditionally
guaranteed, jointly and severally (collectively, the "Subsidiary Guarantees") on
a senior subordinated basis by its wholly-owned subsidiaries:

                                       15
<Page>
                             ATRIUM COMPANIES, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                          SEPTEMBER 30, 2001 AND 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)

7. SUBSIDIARY GUARANTORS: (CONTINUED)
ADW-Northeast, ADW-Arizona, ADW-West Coast, ADW-New England, ADW-New York, Heat,
Champagne, Wing, Darby and VES, Inc, (doing business as Ellison Extrusion
Systems, Inc.). The Company has one non-guarantor subsidiary, Atrium Funding
Corporation (see note 3).

    The operations related to ADW-Northeast, ADW-Arizona, ADW-West Coast,
ADW-New England, ADW-New York, Heat, Champagne, Wing and Darby are presented for
all periods covered. The operations of Ellison Extrusion Systems, Inc. are
included since their date of acquisition on October 25, 2000. The operations of
AFC are included since their date of inception on July 31, 2001. The balance
sheet information includes all subsidiaries as of December 31, 2000 and
September 30, 2001. No single Subsidiary Guarantor has any significant legal
restrictions on the ability of investors or creditors to obtain access to its
assets in event of default on the Subsidiary Guarantee other than subject to
subordination to senior indebtedness.

    The Notes and the Subsidiary Guarantees are subordinated to all existing and
future Senior Indebtedness of the Company. The indenture governing the Notes
contains limitations on the amount of additional indebtedness (including Senior
Indebtedness) which the Company may incur.

                                       16
<Page>
                    ATRIUM COMPANIES, INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEET

                               SEPTEMBER 30, 2001
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)

<Table>
<Caption>
                                                 GUARANTOR     NON-GUARANTOR
                                                SUBSIDIARIES    SUBSIDIARY      PARENT    ELIMINATIONS   CONSOLIDATED
                                                ------------   -------------   --------   ------------   ------------
                                                                                          
ASSETS

CURRENT ASSETS:
  Cash and cash equivalents...................    $(26,715)      $(14,252)     $ 34,837      $13,298       $  7,168
  Accounts receivable, net....................       4,119             --            --           --          4,119
  Retained interest in sold accounts
    receivable................................          --         28,151            --           --         28,151
  Inventories.................................      20,447             --        28,389         (701)        48,135
  Prepaid expenses and other current assets...       1,595             --         1,729           --          3,324
  Deferred tax asset..........................       2,828             --            82       (1,723)         1,187
                                                  --------       --------      --------      -------       --------
  Total current assets........................       2,274         13,899        65,037       10,874         92,084
PROPERTY, PLANT AND EQUIPMENT, net............      23,166             --        36,112           (3)        59,275
GOODWILL, net.................................     169,037             --       178,878           --        347,915
DEFERRED FINANCING COSTS, net.................          --             --        15,183           --         15,183
OTHER ASSETS, net.............................       1,329             --         6,811           --          8,140
                                                  --------       --------      --------      -------       --------
  Total assets................................    $195,806       $ 13,899      $302,021      $10,871       $522,597
                                                  ========       ========      ========      =======       ========

LIABILITIES AND STOCKHOLDER'S EQUITY

CURRENT LIABILITIES:
  Current portion of notes payable............    $  2,367       $     --      $  3,168      $    --       $  5,535
  Accounts payable............................       8,547             --        12,274       13,298         34,119
  Accrued liabilities.........................       9,534            119        20,476           --         30,129
                                                  --------       --------      --------      -------       --------
  Total current liabilities...................      20,448            119        35,918       13,298         69,783
                                                  --------       --------      --------      -------       --------
LONG-TERM LIABILITIES:
  Notes payable...............................     137,009             --       183,357           --        320,366
  Deferred tax liability......................       5,592             --        (2,682)      (1,723)         1,187
  Other long-term liabilities.................          --             --           984           --            984
  Swaps contract liability....................          --             --         8,865           --          8,865
                                                  --------       --------      --------      -------       --------
  Total long-term liabilities.................     142,601             --       190,524       (1,723)       331,402
                                                  --------       --------      --------      -------       --------
  Total liabilities...........................     163,049            119       226,442       11,575        401,185
                                                  --------       --------      --------      -------       --------
COMMITMENTS AND CONTINGENCIES
STOCKHOLDER'S EQUITY:
  Common stock................................          --             --            --           --             --
  Paid-in capital.............................      36,014         15,000       152,998           --        204,012
  Retained earnings (accumulated deficit).....      (3,257)        (1,220)      (68,636)        (704)       (73,817)
  Accumulated other comprehensive loss........          --             --        (8,783)          --         (8,783)
                                                  --------       --------      --------      -------       --------
  Total stockholder's equity..................      32,757         13,780        75,579         (704)       121,412
                                                  --------       --------      --------      -------       --------
    Total liabilities and stockholder's
      equity..................................    $195,806       $ 13,899      $302,021      $10,871       $522,597
                                                  ========       ========      ========      =======       ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       17
<Page>
                    ATRIUM COMPANIES, INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEET

                               DECEMBER 31, 2000
                  (DOLLARS IN THOUSANDS, EXCEPT SHARE AMOUNTS)

<Table>
<Caption>
                                                        GUARANTOR
                                                       SUBSIDIARIES    PARENT    ELIMINATIONS   CONSOLIDATED
                                                       ------------   --------   ------------   ------------
                                                                                    
ASSETS

CURRENT ASSETS:
  Cash and cash equivalents..........................    $(34,019)    $ 31,236     $ 7,429        $  4,646
  Accounts receivable, net...........................      21,652       29,587          --          51,239
  Inventories........................................      19,401       27,570      (1,016)         45,955
  Prepaid expenses and other current assets..........       1,611        1,347          --           2,958
  Deferred tax asset.................................       4,689           50      (2,739)          2,000
                                                         --------     --------     -------        --------
  Total current assets...............................      13,334       89,790       3,674         106,798
PROPERTY, PLANT AND EQUIPMENT, net...................      23,983       30,660          (3)         54,640
GOODWILL, net........................................     173,198      183,476          --         356,674
DEFERRED FINANCING COSTS, net........................          --       16,644          --          16,644
OTHER ASSETS, net....................................       1,484        6,095          --           7,579
                                                         --------     --------     -------        --------
  Total assets.......................................    $211,999     $326,665     $ 3,671        $542,335
                                                         ========     ========     =======        ========

LIABILITIES AND STOCKHOLDER'S EQUITY

CURRENT LIABILITIES:
  Current portion of notes payable...................    $  2,621     $  3,590     $    --        $  6,211
  Accounts payable...................................       6,714       14,339       7,429          28,482
  Accrued liabilities................................      12,601       20,503          --          33,104
                                                         --------     --------     -------        --------
  Total current liabilities..........................      21,936       38,432       7,429          67,797
                                                         --------     --------     -------        --------
LONG-TERM LIABILITIES:
  Notes payable......................................     147,308      201,829          --         349,137
  Deferred tax liability.............................       4,689           50      (2,739)          2,000
  Other long-term liabilities........................          --        1,325          --           1,325
                                                         --------     --------     -------        --------
  Total long-term liabilities........................     151,997      203,204      (2,739)        352,462
                                                         --------     --------     -------        --------
  Total liabilities..................................     173,933      241,636       4,690         420,259
                                                         --------     --------     -------        --------
COMMITMENTS AND CONTINGENCIES
STOCKHOLDER'S EQUITY:
  Common stock.......................................          --           --          --              --
  Paid-in capital....................................      36,013      159,991          --         196,004
  Retained earnings (accumulated deficit)............       2,053      (74,962)     (1,019)        (73,928)
                                                         --------     --------     -------        --------
  Total stockholder's equity.........................      38,066       85,029      (1,019)        122,076
                                                         --------     --------     -------        --------
    Total liabilities and stockholder's equity.......    $211,999     $326,665     $ 3,671        $542,335
                                                         ========     ========     =======        ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       18
<Page>
                    ATRIUM COMPANIES, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENT OF OPERATIONS

                 FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2001
                             (DOLLARS IN THOUSANDS)

<Table>
<Caption>
                                       GUARANTOR     NON-GUARANTOR
                                      SUBSIDIARIES    SUBSIDIARY      PARENT    ELIMINATIONS   CONSOLIDATED
                                      ------------   -------------   --------   ------------   ------------
                                                                                
NET SALES...........................    $56,950         $    --      $92,432      $(8,536)       $140,846

COST OF GOODS SOLD..................     35,779              --       66,410       (8,536)         93,653
                                        -------         -------      -------      -------        --------
Gross profit........................     21,171              --       26,022           --          47,193
                                        -------         -------      -------      -------        --------
OPERATING EXPENSES:
Selling, delivery, general and
  administrative expenses (excluding
  stock compensation, securitization
  and amortization expense).........     13,254              --       17,727           --          30,981

  Stock compensation expense........         --              --         (207)          --            (207)

  Securitization expense............         --           1,220          (55)          --           1,165

  Amortization expense..............      1,694              --        1,925           --           3,619
                                        -------         -------      -------      -------        --------
SELLING, DELIVERY, GENERAL AND
  ADMINISTRATIVE EXPENSES...........     14,948           1,220       19,390           --          35,558

  Special charges...................         --              --          136           --             136
                                        -------         -------      -------      -------        --------
                                         14,948           1,220       19,526           --          35,694
                                        -------         -------      -------      -------        --------
    Income (loss) from operations...      6,223          (1,220)       6,496           --          11,499

INTEREST EXPENSE....................      4,156              --        5,303           --           9,459

OTHER INCOME (EXPENSE), net.........         12              --          (88)          --             (76)
                                        -------         -------      -------      -------        --------

Income (loss) before income taxes
  and extraordinary charge..........      2,079          (1,220)       1,105           --           1,964

PROVISION (BENEFIT) FOR INCOME
  TAXES.............................        355              --           34           --             389
                                        -------         -------      -------      -------        --------

NET INCOME (LOSS)...................    $ 1,724         $(1,220)     $ 1,071      $    --        $  1,575
                                        =======         =======      =======      =======        ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       19
<Page>
                    ATRIUM COMPANIES, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENT OF OPERATIONS

                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2001
                             (DOLLARS IN THOUSANDS)

<Table>
<Caption>
                                      GUARANTOR     NON-GUARANTOR
                                     SUBSIDIARIES    SUBSIDIARY      PARENT    ELIMINATIONS   CONSOLIDATED
                                     ------------   -------------   --------   ------------   ------------
                                                                               
NET SALES..........................    $155,997        $    --      $265,116     $(24,155)      $396,958

COST OF GOODS SOLD.................      99,363             --       192,612      (24,522)       267,453
                                       --------        -------      --------     --------       --------
Gross profit.......................      56,634             --        72,504          367        129,505
                                       --------        -------      --------     --------       --------
OPERATING EXPENSES:
Selling, delivery, general and
  administrative expenses
  (excluding stock compensation,
  securitization and amortization
  expense).........................      38,372             --        48,528          (80)        86,820

  Stock compensation expense.......          --             --           506           --            506

  Securitization expense...........          --          1,220           (55)          --          1,165

  Amortization expense.............       5,012             --         5,740           --         10,752
                                       --------        -------      --------     --------       --------
SELLING, DELIVERY, GENERAL AND
  ADMINISTRATIVE EXPENSES..........      43,384          1,220        54,719          (80)        99,243

  Special charges..................          --             --           275           --            275
                                       --------        -------      --------     --------       --------
                                         43,384          1,220        54,994          (80)        99,518
                                       --------        -------      --------     --------       --------
    Income (loss) from
    operations.....................      13,250         (1,220)       17,510          447         29,987

INTEREST EXPENSE...................      12,388             --        16,579           --         28,967

OTHER INCOME (EXPENSE), net........          48             --            75         (133)           (10)
                                       --------        -------      --------     --------       --------

Income (loss) before income taxes
  and extraordinary charge.........         910         (1,220)        1,006          314          1,010

PROVISION (BENEFIT) FOR INCOME
  TAXES............................         778             --           121           --            899
                                       --------        -------      --------     --------       --------

NET INCOME (LOSS)..................    $    132        $(1,220)     $    885     $    314       $    111
                                       ========        =======      ========     ========       ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       20
<Page>
                    ATRIUM COMPANIES, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF OPERATIONS

                 FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2000
                             (DOLLARS IN THOUSANDS)

<Table>
<Caption>
                                                    GUARANTOR
                                                   SUBSIDIARIES    PARENT    ELIMINATIONS   CONSOLIDATED
                                                   ------------   --------   ------------   ------------
                                                                                
NET SALES........................................    $ 61,445     $63,338      $(11,462)      $113,321

COST OF GOODS SOLD...............................      55,395      47,904       (11,515)        91,784
                                                     --------     -------      --------       --------
Gross profit.....................................       6,050      15,434            53         21,537
                                                     --------     -------      --------       --------
OPERATING EXPENSES:
Selling, delivery, general and administrative
  expenses (excluding amortization expense)......      20,001      12,319           (80)        32,240

  Amortization expense...........................       1,054       1,023            --          2,077
                                                     --------     -------      --------       --------
SELLING, DELIVERY, GENERAL AND ADMINISTRATIVE
  EXPENSES.......................................      21,055      13,342           (80)        34,317

  Special charges................................         153         (28)           --            125
                                                     --------     -------      --------       --------
                                                       21,208      13,314           (80)        34,442
                                                     --------     -------      --------       --------
    Income (loss) from operations................     (15,158)      2,120           133        (12,905)

INTEREST EXPENSE.................................       5,127       4,089            --          9,216

OTHER INCOME (EXPENSE), net......................         (43)        783          (133)           607
                                                     --------     -------      --------       --------

Income (loss) before income taxes................     (20,328)     (1,186)           --        (21,514)

PROVISION (BENEFIT) FOR INCOME TAXES.............      (6,763)        (82)           --         (6,845)
                                                     --------     -------      --------       --------

NET INCOME (LOSS)................................    $(13,565)    $(1,104)     $     --       $(14,669)
                                                     ========     =======      ========       ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       21
<Page>
                    ATRIUM COMPANIES, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF OPERATIONS

                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2000
                             (DOLLARS IN THOUSANDS)

<Table>
<Caption>
                                                   GUARANTOR
                                                  SUBSIDIARIES    PARENT    ELIMINATIONS   CONSOLIDATED
                                                  ------------   --------   ------------   ------------
                                                                               
NET SALES.......................................    $235,780     $179,357     $(31,742)      $383,395

COST OF GOODS SOLD..............................     190,765      133,098      (31,902)       291,961
                                                    --------     --------     --------       --------
Gross profit....................................      45,015       46,259          160         91,434
                                                    --------     --------     --------       --------
OPERATING EXPENSES:
Selling, delivery, general and administrative
  expenses (excluding amortization expense).....      65,269       30,996         (240)        96,025

  Amortization expense..........................       3,633        3,054           --          6,687
                                                    --------     --------     --------       --------
SELLING, DELIVERY, GENERAL AND ADMINISTRATIVE
  EXPENSES......................................      68,902       34,050         (240)       102,712

  Special charges...............................      24,473        1,235           --         25,708
                                                    --------     --------     --------       --------
                                                      93,375       35,285         (240)       128,420
                                                    --------     --------     --------       --------
    Income (loss) from operations...............     (48,360)      10,974          400        (36,986)

INTEREST EXPENSE................................      16,571       10,374           --         26,945

OTHER INCOME (EXPENSE), net.....................         102        1,739         (400)         1,441
                                                    --------     --------     --------       --------

Income (loss) before income taxes...............     (64,829)       2,339           --        (62,490)

PROVISION (BENEFIT) FOR INCOME TAXES............     (17,164)       1,838           --        (15,326)
                                                    --------     --------     --------       --------

NET INCOME (LOSS)...............................    $(47,665)    $    501     $     --       $(47,164)
                                                    ========     ========     ========       ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       22
<Page>
                    ATRIUM COMPANIES, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2001
                             (DOLLARS IN THOUSANDS)

<Table>
<Caption>
                                           GUARANTOR     NON-GUARANTOR
                                          SUBSIDIARIES    SUBSIDIARY      PARENT    ELIMINATIONS   CONSOLIDATED
                                          ------------   -------------   --------   ------------   ------------
                                                                                    
CASH FLOWS FROM OPERATING ACTIVITIES....    $ 10,302       $(14,252)     $ 33,045      $ 5,869       $ 34,964
                                            --------       --------      --------      -------       --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of property, plant and
    equipment...........................      (2,998)            --        (9,102)          --        (12,100)
  Proceeds from sales of assets.........          --             --           101           --            101
  Other assets..........................          --             --        (1,648)          --         (1,648)
                                            --------       --------      --------      -------       --------
      Net cash used in investing
        activities......................      (2,998)            --       (10,649)          --        (13,647)
                                            --------       --------      --------      -------       --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Net borrowings under revolving credit
    facility............................          --             --        (5,000)          --         (5,000)
  Scheduled principal payments on term
    notes...............................          --             --       (24,354)          --        (24,354)
  Contributions from Atrium Corp, net...          --             --         8,008           --          8,008
  Payment of other notes payable........          --             --          (230)          --           (230)
  Checks drawn in excess of book
    balances............................          --             --         3,169           --          3,169
  Capitalized deferred financing
  costs.................................          --             --          (388)          --           (388)
                                            --------       --------      --------      -------       --------
      Net cash used in financing
        activities......................          --             --       (18,795)          --        (18,795)
                                            --------       --------      --------      -------       --------
NET INCREASE (DECREASE) IN CASH AND CASH
  EQUIVALENTS...........................       7,304        (14,252)        3,601        5,869          2,522
CASH AND CASH EQUIVALENTS, BEGINNING OF
  PERIOD................................     (34,019)            --        31,236        7,429          4,646
                                            --------       --------      --------      -------       --------
CASH AND CASH EQUIVALENTS, END OF
  PERIOD................................    $(26,715)      $(14,252)     $ 34,837      $13,298       $  7,168
                                            ========       ========      ========      =======       ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       23
<Page>
                    ATRIUM COMPANIES, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2000
                             (DOLLARS IN THOUSANDS)

<Table>
<Caption>
                                                   GUARANTOR
                                                  SUBSIDIARIES    PARENT    ELIMINATIONS   CONSOLIDATED
                                                  ------------   --------   ------------   ------------
                                                                               
CASH FLOWS FROM OPERATING ACTIVITIES............    $ (9,826)    $  7,733     $ 6,625        $  4,532
                                                    --------     --------     -------        --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of property, plant and equipment....      (2,522)      (8,402)         --         (10,924)
  Proceeds from sales of assets.................          --        2,801          --           2,801
  Transfer to restricted cash...................          --      (23,930)         --         (23,930)
  Net proceeds from divestitures of Wing and
    Atrium Wood assets..........................          --        6,382          --           6,382
  Proceeds from sale of equity securities.......          --          620          --             620
  Other assets..................................          --       (3,441)         --          (3,441)
                                                    --------     --------     -------        --------
      Net cash used in investing activities.....      (2,522)     (25,970)         --         (28,492)
                                                    --------     --------     -------        --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Payment of other notes payable................          --         (233)         --            (233)
  Net borrowings under revolving credit
  facility......................................          --       16,230          --          16,230
  Scheduled principal payments on term notes....          --       (1,500)         --          (1,500)
  Contributions from Atrium Corp, net...........          --        5,327          --           5,327
  Capitalized deferred financing costs..........          --         (426)         --            (426)
  Checks drawn in excess of bank balances.......          --        6,659          --           6,659
                                                    --------     --------     -------        --------
      Net cash provided by financing
      activities................................          --       26,057          --          26,057
                                                    --------     --------     -------        --------
NET INCREASE (DECREASE) IN CASH AND CASH
  EQUIVALENTS...................................     (12,348)       7,820       6,625           2,097
CASH AND CASH EQUIVALENTS, BEGINNING OF
  PERIOD........................................     (23,144)      19,956       4,482           1,294
                                                    --------     --------     -------        --------
CASH AND CASH EQUIVALENTS, END OF PERIOD........    $(35,492)    $ 27,776     $11,107        $  3,391
                                                    ========     ========     =======        ========
</Table>

   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       24
<Page>
8.  CONTRIBUTION FROM ATRIUM CORPORATION:

    During May of 2001, the Company received a capital contribution of $10,050
from Atrium Corporation, which represented the proceeds from the issuance of its
common stock. This amount was contributed to the Company net of transaction
expenses of $1,126 incurred in connection with the registration of the Atrium
Corporation Senior Pay-In-Kind Notes, $897 for distributions to Atrium
Corporation for the repurchase of stock options and $19 for cash used in
operating activities.

9.  TRANSACTIONS:

ALENCO ASSET PURCHASE

    On August 17, 2001, the Company entered into an asset purchase agreement
with Alenco Holding Corporation (f.k.a. Reliant Building Products) whereby the
Company purchased assets comprised primarily of machinery and equipment located
in Gallatin, Tennessee for $1,326. The transaction has been accounted for as a
purchase and accordingly the assets have been recorded at cost, which represents
fair market value.

ROYAL ASSET SALE

    On September 10, 2001, the Company and its subsidiary, Thermal
Industries, Inc., entered into an asset sale agreement with Royal Group
Technologies Limited ("Royal") to sell the assets of Thermal's vinyl extrusion
operation for $3,800. The completion of the transaction will occur in a series
of four closings, the first of which begins on October 1, 2001 and the final
closing ending on December 17, 2001. The Company expects to record a gain on the
sale of the assets of approximately $1,000 in the fourth quarter. Additionally,
the Company entered into a supply agreement with Royal for a period of five
years at current market prices for minimum quantities.

                                       25
<Page>
ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
  OF OPERATIONS

CERTAIN FORWARD-LOOKING STATEMENTS

    This 10-Q contains certain forward looking statements (as such term is
defined in the Private Securities Litigation Reform Act of 1995) that involve
substantial risks and uncertainties relating to the Company that are based on
the beliefs of management. When used in this 10-Q, the words "anticipate,"
"believe," "estimate," "expect," "intend," and similar expressions, as they
relate to the Company or the Company's management, identify forward-looking
statements. Such statements reflect the current views of the Company with
respect to the risks and uncertainties regarding the operations and the results
of operations of the Company as well as its customers and suppliers, including
the availability of consumer credit, interest rates, employment trends, changes
in levels of consumer confidence, changes in consumer preferences, national and
regional trends in new housing starts, raw material costs, pricing pressures,
shifts in market demand and general economic conditions. Should one or more of
these risks or uncertainties materialize, or should underlying assumptions or
estimates prove incorrect, actual results may vary materially from those
described herein as anticipated, believed, estimated, expected or intended.

RESULTS OF OPERATIONS

    The operations of the Company are cyclical in nature and generally result in
increases during the peak building season which coincides with the second and
third quarters of the year. Accordingly, results of operations for the third
quarter ended and the nine months ended September 30, 2001 are not necessarily
indicative of results expected for the full year.

    The operations of Ellison are included since their date of acquisition,
October 25, 2000, and the Wing and Wood divestitures are excluded since their
dispositions on August 25, 2000 and August 30, 2000, respectively. The balance
sheet information includes all subsidiaries and divisions as of September 30,
2001 and December 31, 2000.

    NET SALES.  Net sales increased by $27,525 from $113,321 during the third
quarter of 2000 to $140,846 during the third quarter of 2001 and increased
$13,563 from $383,395 during the first nine months of 2000 to $396,958 during
the first nine months of 2001. The increase during the third quarter was
primarily the result of the $37,689 in net sales from the acquisition of
Ellison. The Company also experienced increases during the third quarter from
its vinyl window operations (excluding the Ellison acquisition) of $4,273. The
increases were offset by $9,318 in net sales from the divestiture of the
Company's Wing and Wood operations during the third quarter of 2000. The
increase during the first nine months of 2001 was primarily the result of
$103,069 in net sales from the acquisition of Ellison and increases of $7,883
from the vinyl window operations. These increases were partially offset by the
loss of $91,569 in net sales from the divestiture of the Company's Wing and Wood
operations. The Company also experienced decreases during the first nine months
of 2001 from its aluminum window operations as a result of inclement weather in
the first quarter and softer demand in the second and third quarters. These
operations net sales decreased $7,935, or 4.9%, compared to the first nine
months of 2000 and $5,078, or 8.9%, compared to the third quarter of 2000.

    COST OF GOODS SOLD.  Cost of goods sold improved from 81.0% of net sales
during the third quarter of 2000 to 66.5% of net sales during the third quarter
of 2001 and from 76.2% of net sales during the first nine months of 2000 to
67.4% of net sales during the first nine months of 2001. The improvement over
prior year is primarily attributable to the divestitures of Wing and Wood during
2000. During the third quarter of 2000, Wing and Wood had a cost of goods sold
as a percent of net sales of 267.3% and 116.5%, respectively. During the first
nine months of 2000, Wing and Wood had a cost of goods sold as a percent of net
sales of 106.9% and 124.4%, respectively. These improvements were partially
offset by increases at the aluminum and vinyl divisions (excluding the Ellison
acquisition). The aluminum

                                       26
<Page>
division's cost of goods sold increased from 74.5% of net sales during the third
quarter of 2000 to 77.6% of net sales during the third quarter of 2001 and from
73.0% of net sales during the first nine months of 2000 to 76.6% of net sales
during the first nine months of 2001. The vinyl divisions cost of goods sold
increased from 61.8% of net sales during the third quarter of 2000 to 62.4% of
net sales during the third quarter of 2001 and from 62.9% of net sales during
the first nine months of 2000 to 63.4% of net sales during the first nine months
of 2001. These increases were due to a number of factors including energy
surcharges on materials, higher insurance costs related to workers'
compensation, moving expenses associated with plant consolidations, and lease
costs at new facilities. The LIFO reserve expense during the third quarter of
2000 was $1,288 and the LIFO reserve benefit was $349 during the third quarter
of 2001. The LIFO reserve expense during the first nine months of 2000 was
$1,881 and the LIFO reserve benefit was $619 during the first nine months of
2001. Overall, changes in the cost of goods sold as a percentage of net sales
for one period as compared to another period may reflect a number of factors,
including changes in the relative mix of products sold and, the effects of
changes in sales prices, material costs and changes in productivity levels.

    SELLING, DELIVERY, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, delivery,
general and administrative expenses decreased $1,259 from $32,240 (28.5% of net
sales during the third quarter of 2000) to $30,981 (22.0% of net sales during
the third quarter of 2001) and decreased $9,205 from $96,025 (25.0% of net sales
during the first nine months of 2000) to $86,820 (21.9% of net sales during the
first nine months of 2001). The third quarter of 2000 included $6,965 and $1,500
from the divested divisions of Wing and Wood, respectively. The third quarter of
2001 included $6,770 from the acquisition of Ellison. The first nine months of
2000 included $27,627 and $3,163 from the divested divisions of Wing and Wood,
respectively. The first nine months of 2001 included $19,621 from the
acquisition of Ellison. If the Wing and Wood divestitures and the Ellison
acquisition had both occurred on January 1, 2000, total selling, delivery,
general and administrative expenses would have remained consistent with prior
year at 22.0% of net sales during the third quarter for each year and improved
from 22.4% of net sales during the first nine months of 2000 to 21.9% of net
sales during the first nine months of 2001. If the Wing and Wood divestitures
and the Ellison acquisition had both occurred on January 1, 2000, delivery
expense would have improved from 6.4% of net sales during the third quarter of
2000 to 5.7% of net sales during the third quarter of 2001 and improved from
6.1% of net sales during the first nine months of 2000 to 5.9% of net sales
during the first nine months of 2001. General and administrative expenses
increased from 7.6% of net sales during the third quarter of 2000 to 8.3% of net
sales during the third quarter of 2001 while improving from 8.1% of net sales
during the first nine months of 2000 to 7.8% of net sales during the first nine
months of 2001. The Company continues to gain operating leverage from its sales
growth and its acquisitions. Selling expenses remained flat at 8.0% of net sales
for the third quarter and 8.2% of net sales for the nine months, primarily as a
result of the variable nature of commissions.

    AMORTIZATION EXPENSE.  Amortization expense increased $1,542 from $2,077
during the third quarter of 2000 to $3,619 during the third quarter of 2001 and
increased $4,065 from $6,687 during the first nine months of 2000 to $10,752
during the first nine months of 2001. The increase was largely due to the
increased amortization of goodwill recorded in connection with the acquisition
of Ellison during October 2000.

    SPECIAL CHARGES.  During the second and third quarters of 2001, the Company
recorded one time charges of $275 relating to non-capitalizable legal fees
incurred to amend the Credit Facility. During the second and third quarters of
2000, the Company recorded a one time charge of $25,708, of which $24,473
related to the write-off of certain intangible assets and the write-down of
certain assets related to sale of Wing and $1,235 related to the write-down of
certain assets at the Wood.

    INTEREST EXPENSE.  Interest expense increased $243 from $9,216 during the
third quarter of 2000 to $9,459 during the third quarter of 2001 and increased
$2,022 from $26,945 during the first nine months

                                       27
<Page>
of 2000 to $28,967 during the first nine months of 2001. The increase in
interest expense was due primarily to the additional debt of $38,000, under the
Credit Facility, in connection with the acquisition of Ellison. In addition, the
increase in interest expense includes the amortization of additional deferred
financing costs incurred in connection with the acquisition.

LIQUIDITY AND CAPITAL RESOURCES

    Cash generated from operations and availability under the Companies'
Revolving Credit Facility and availability under the Company's Accounts
Receivable Securitization Facility are the Company's principal sources of
liquidity. During the first nine months of 2001, cash was primarily used for
increases in working capital, capital expenditures and debt payments. Net cash
provided by operating activities was $34,964 during the first nine months of
2001 ($37,363 during the third quarter of 2001) compared to $4,532 during the
first nine months of 2000 ($13,760 during the third quarter of 2000). The
increase in cash provided by operating activities is largely due the receipt of
proceeds from the accounts receivable securitization during the third quarter of
2001. Net cash used in investing activities during the first nine months of 2001
was $13,647 (2,636 during the third quarter of 2001) compared to $28,492 during
the first nine months of 2000 ($24,112 during the third quarter of 2000). The
decrease in cash used in investing activities was due primarily to the transfer
of restricted cash as a result of the Wing and Atrium Wood divestitures during
the third quarter of 2000. The current year capital expenditures are related to
increasing plant capacity and automation. Cash used in financing activities
during the first nine months of 2001 was $18,795 ($29,996 during the third
quarter of 2001) compared to cash provided by financing activities of $26,057
during the first nine months of 2000 ($10,480 during the third quarter of 2000).
The decrease from prior year was due to debt repayments required as a result of
the accounts receivable securitization during 2001 and higher borrowings on the
Company's credit facility during 2000.

OTHER CAPITAL RESOURCES

    In connection with the recapitalization, the Company entered into a Credit
Agreement providing for a revolving facility in the amount of $30,000, which was
increased to $40,000 in September 1999. In connection with the acquisition of
Ellison, the Revolving Credit Facility was increased to $47,000, of which
$10,000 is available under a letter of credit sub-facility. The revolving
facility has a maturity date of September 30, 2004. Additionally, the Company
has entered into an accounts receivable securitization program which will make
additional funds available to the Company depending on working capital levels.
At September 30, 2001, we had $31,705 of availability under the revolving
facility, net of borrowings of $14,000 and outstanding letters of credit
totaling $1,295. As of November 13, 2001, the Company had cash of $3,348 and
$31,205 of availability under the Revolving Credit Facility, net of borrowings
of $14,500 and outstanding letters of credit totaling $1,295. At September 30,
2001, the Company had $22,200 of availability under the securitization facility,
subject to borrowing based requirements, net of securitizations of $27,800. As
of November 13, 2001, the Company had $20,100 available under the securitization
facility, net of securitizations of $29,900.

CAPITAL EXPENDITURES

    The Company had cash capital expenditures of $12,100 during the first nine
months of 2001 ($3,431 during the third quarter of 2001) compared to $10,924
during the first nine months of 2000 ($6,606 during the third quarter of 2000).
Capital expenditures during the first nine months of 2001 were largely a result
of the Company's continued efforts to increase efficiency through automation at
its various divisions as well as to increase plant capacity at the Company's
Dallas-based aluminum and vinyl operations. The Company expects capital
expenditures, including capitalization of software implementation costs
(exclusive of acquisitions) in 2001 to be approximately $15,000, however, actual
capital requirements may change.

                                       28
<Page>
    The ability of the Company to meet its debt service and working capital
obligations and capital expenditure requirements is dependant, however, upon the
future performance of the Company and its subsidiaries which, in turn, will be
subject to general economic conditions and to financial, business and other
factors, including factors beyond the Company's control.

NEW ACCOUNTING PRONOUNCEMENT

    In September 2000, the FASB issued SFAS No. 140, "Accounting for Transfers
and Servicing of Financial Assets and Extinguishments of Liabilities, a
replacement of SFAS No. 125." SFAS No. 140 revised the standards for accounting
for securitizations and other transfers of financial assets and collateral and
requires certain disclosures. SFAS No. 140 is effective for transfers and
servicing of financial assets and extinguishments of liabilities occurring after
June 30, 2001. The Company adopted SFAS No. 140 in the third quarter upon
consummation of the asset securitization transaction discussed in Note 3.

    In July 2001, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standard SFAS No. 141, "Business Combination," and SFAS
No. 142, "Goodwill and Other Intangible Assets." SFAS No. 141 requires all
business combinations initiated after September 30, 2001 be accounted for using
the purchase method. Additionally, SFAS No. 141 establishes specific criteria
for the recognition of intangible assets separately from goodwill. SFAS No. 142
primarily addresses the accounting for goodwill and intangible assets subsequent
to their acquisition and is effective for the Company on January 1, 2002. The
most significant changes made by SFAS No. 142 require that goodwill and
indefinite lived intangible assets no longer be amortized and be tested for
impairment at least on an annual basis. Additionally, the amortization period of
intangible assets with finite lives will no longer be limited to forty years.

    The Company is currently assessing the impact of SFAS No. 141 and No. 142
and has not yet determined the effects these statements will have on its
consolidated financial position or results of operations.

    In August 2001, the FASB issued SFAS No. 143, "Accounting for Asset
Retirement Obligations." SFAS No. 143 addresses financial accounting and
reporting for obligations associated with the retirement of tangible long-lived
assets and the associated asset retirement costs. SFAS No. 143 is effective for
the Company on January 1, 2003. The Company is currently assessing the impact of
SFAS No. 143 and has not yet determined the effects, if any, it will have on its
consolidated financial position or results of operations.

    In October 2001, the FASB issued SFAS No. 144, "Accounting for the
Impairment or Disposal of Long-Lived Assets." SFAS No. 144 addresses financial
accounting and reporting for the impairment or disposal of long-lived assets.
SFAS No. 144 is effective for the Company on January 1, 2002. The Company is
currently assessing the impact of SFAS No. 144 and has not yet determined the
effects, if any, it will have on its consolidated financial position or results
of operations.

                                       29
<Page>
ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

MARKET RISK

    The Company is exposed to market risk from changes in interest rates and
commodity pricing. The Company uses derivative financial instruments on a
limited basis to hedge economic exposures including interest rate protection
agreements and forward commodity delivery agreements. The Company does not enter
into derivative financial instruments or other financial instruments for
speculative trading purposes.

    On November 1, 2000, the Company entered into a $100,000 interest rate swap
agreement to limit the effect of changes in interest rates on long-term
borrowings. Under the agreement, the Company pays interest at a fixed rate of
6.66% on the notional amount and receives interest therein at the three-month
LIBOR on a quarterly basis. This swap expires in November 2003.

    On December 8, 2000, the Company entered into a $40,000 interest rate swap
agreement to limit the effect of changes in interest rates on long-term
borrowings. Under the agreement, the Company pays interest at a fixed rate of
6.15% on the notional amount and receives interest therein at the three-month
LIBOR on a quarterly basis. This swap expires in December 2002.

ADOPTION OF SFAS NO. 133

    The Company adopted SFAS No. 133, Accounting for Derivative Instruments and
Hedging Activities, and the corresponding amendments on January 1, 2001. In
accordance with the transition provisions of SFAS 133, the Company recorded a
cumulative-effect adjustment as of January 1, 2001 of $2,319 to other
comprehensive income. This adjustment represents the current fair-value of
hedging instruments related to interest rate swap agreements of $2,646 with an
offset of $327 related to the reclassification of deferred gains on previously
terminated interest rate swaps. There is no income tax effect considering there
is a full valuation allowance against deferred tax assets.

    At September 30, 2001, the fair-value of the hedging instruments is a
liability of $8,865 and is included in other comprehensive income and other
long-term liabilities. The Company expects that none of this liability will
require adjustment to expense within the next twelve months.

    The Company is exposed to credit-related losses in the event of
nonperformance by counterparties to financial instruments, but it expects all
counterparties to meet their obligations given their high credit ratings.

    The Company, as part of its risk management program, is party to interest
rate swap agreements for the purpose of hedging its exposure to floating
interest rates on certain portions of its debt. As of September 30, 2001, the
Company had $141,620 of notional amount in outstanding interest rate swaps with
third parties. The maximum length of the interest rate swaps currently in place
as of September 30, 2001 is approximately 2 1/4 years.

    All derivatives are recognized on the balance sheet at their fair-value. On
the date that the Company enters into a derivative contract, it designates the
derivative as a hedge of (a) a forecasted transaction or (b) the variability of
cash flows that are to be received or paid in connection with a recognized asset
or liability (a "cash flow" hedge). Changes in the fair-value of a derivative
that is highly effective as--and that is designated and qualifies as--a cash
flow hedge, to the extent that the hedge is effective, are recorded in other
comprehensive income, until earnings are affected by the variability of cash
flows of the hedged transaction (e.g., until periodic settlements of a
variable-rate asset or liability are recorded in earnings). Any hedge
ineffectiveness (which represents the amount by which the changes in the
fair-value of the derivative exceed the variability in the cash flows of the
forecasted transaction) is recorded in current-period earnings. As of
September 30, 2001, all hedges outstanding were highly effective.

                                       30
<Page>
    The Company formally documents all relationships between hedging instruments
and hedge items, as well as its risk-management objective and strategy for
undertaking various hedge transactions. This process includes linking all
derivatives that are designated as fair-value or cash flow hedges to
(1) specific assets and liabilities on the balance sheet or (2) specific firm
commitments or forecasted transactions. The Company also formally assesses (both
at the hedge's inception and on an ongoing basis) whether the derivatives that
are used in hedging transactions have been highly effective in offsetting
changes in the fair value or cash flows of hedged items and whether those
derivatives may be expected to remain highly effective in future periods. When
it is determined that a derivative is not (or has ceased to be) highly effective
as a hedge, the Company discontinues hedge accounting prospectively, as
discussed below.

    The Company discontinues hedge accounting prospectively when (1) it
determines that the derivative is no longer effective in offsetting changes in
the fair-value or cash flows of a hedge item (including hedged items such as
firm commitments or forecasted transactions); (2) the derivative expires or is
sold, terminated, or exercised; (3) it is no longer probable that the forecasted
transaction will occur; or (4) management determines that designating the
derivative as a hedging instrument is no longer appropriate.

    When the Company discontinues hedge accounting because it is no longer
probable that the forecasted transaction will occur in the originally expected
period, the gain or loss on the derivative remaining in accumulated other
comprehensive income is reclassified into earnings. In all situations in which
hedge accounting is discontinued and the derivative remains outstanding, the
Company will carry the derivative at its fair-value on the balance sheet,
recognizing changes in the fair-value in current-period earnings.

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<Page>
                           PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

    The Company is party to various claims, legal actions, and complaints
arising in the ordinary course of business. In the opinion of management, all
such matters are without merit or are of such kind, or involve such amounts,
that an unfavorable disposition would not have a material adverse effect on the
financial position, results of operations or liquidity of the Company.

ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

    (a) Exhibits--None

    (b) Reports on Form 8-K

       On August 14, 2001, in accordance with Item 5 of Form 8-K, the Company
       filed a Report on Form 8-K to announce that on July 31, 2001, the Company
       and certain of its subsidiaries ("the Originators") entered into an
       agreement whereby each Originator agreed to sell on a non-recourse basis,
       and on an ongoing basis, a pool of receivables comprising their entire
       trade receivable portfolio to a wholly owned bankruptcy-remote special
       purpose funding subsidiary Atrium Funding Corporation ("AFC") of the
       Company. On July 31, 2001, AFC entered into an agreement with Fairway
       Finance Corp., agented by BMO Nesbitt Burns, whereby AFC sold a pro rata
       share of the trade receivable portfolio for an aggregate payments of up
       to $50,000.

       On September 21, 2001, in accordance with Item 5 of Form 8-K, the Company
       filed a Report on Form 8-K to announce that Royal Group Technologies
       Limited (RYG: TSE, NYSE) has entered into agreements with Atrium
       Companies Inc. to acquire the extrusion assets of Atrium's subsidiary,
       Thermal Industries, Inc and to supply extruded profiles to Thermal
       Industries' fabricating operations.

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<Page>
                                   SIGNATURES

    Pursuant to the requirements of the Securities and Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

<Table>
                                                      
                                                       ATRIUM COMPANIES, INC.
                                                       (Registrant)

Date: November 14, 2001                                By:               /s/ JEFF L. HULL
                                                            -----------------------------------------
                                                                           Jeff L. Hull
                                                              PRESIDENT, CHIEF EXECUTIVE OFFICER AND
                                                              DIRECTOR (PRINCIPAL EXECUTIVE OFFICER)

Date: November 14, 2001                                By:               /s/ ERIC W. LONG
                                                            -----------------------------------------
                                                                           Eric W. Long
                                                              CHIEF FINANCIAL OFFICER, TREASURER AND
                                                                SECRETARY (PRINCIPAL FINANCIAL AND
                                                                       ACCOUNTING OFFICER)
</Table>

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