UNITED STATES

                      SECURITIES AND EXCHANGE COMMISSION

                           WASHINGTON, D.C. 20549

                                  FORM 10-Q

(Mark One)
  /X/           QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                    OF THE  SECURITIES  EXCHANGE ACT OF 1934
                  For The  Quarterly  Period Ended July 1, 2001

                                        OR

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

                       Commission File Number 33-81808

                   BUILDING MATERIALS CORPORATION OF AMERICA
             (Exact name of registrant as specified in its charter)


        Delaware                                               22-3276290
(State of Incorporation)                                  (I. R. S. Employer
                                                           Identification No.)

 1361 Alps Road, Wayne, New Jersey                               07470
(Address of principal executive offices)                       (Zip Code)

Registrant's telephone number, including area code           (973) 628-3000

See table of additional registrants.

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  / /

As of August  10,  2001,  1,015,010  shares of Class A Common  Stock,  $.001 par
value,  and 15,000 shares of Class B Common Stock,  $.001 par value, of Building
Materials  Corporation of America were  outstanding.  There is no trading market
for the common stock of Building Materials Corporation of America.

As of August 10,  2001,  each of the  additional  registrants  had the number of
shares  outstanding  which is shown on the table  below.  No shares were held by
non-affiliates.







                            ADDITIONAL REGISTRANTS





                                                                                                         Address, including zip code
                                                                               Registration No./I.R.S.   and telephone number,
Exact name of registrant as    State or other jurisdiction   No. of Shares     Employer Identification   including area code, of
specified in its charter       of incorporation or           Outstanding       No.                       registrant's principal
                               organization                                                              executive offices
- ---------------------------    ---------------------------   --------------    ------------------------  ---------------------------
                                                                                             
Building Materials             Delaware                      10                333-69749-01/             1361 Alps Road
Manufacturing Corporation                                                      22-3626208                Wayne, NJ  07470
                                                                                                         (973) 628-3000
Building Materials             Delaware                      10                333-69749-02/             300 Delaware Avenue
Investment Corporation                                                         22-3626206                Suite 303
                                                                                                         Wilmington, DE  19801
                                                                                                         (302) 427-5960

BMCA Insulation Products Inc.  Delaware                      10                333-58442-10/             1361 Alps Road
                                                                               22-3275477                Wayne, NJ  07470
                                                                                                         (973) 628-3000

Ductwork Manufacturing         Delaware                      10                333-58442-08/             25 Central Industrial Row
Corporation                                                                    58-2507312                Purvis, MS  39475
                                                                                                         (601) 794-5500

GAF Leatherback Corp.          Delaware                      10                333-58442-09/             11 Hillcrest Road
                                                                               22-3497242                Hollister, CA  95024-5050
                                                                                                         (408) 636-5050

GAF Premium Products Inc.      Delaware                      10                333-58442-04/             1361 Alps Road
                                                                               22-3383680                Wayne, NJ  07470
                                                                                                         (973) 628-3000

GAF Materials Corporation      Delaware                      10                333-58442-05/             1361 Alps Road
(Canada)                                                                       22-3563280                Wayne, NJ  07470
                                                                                                         (973) 628-3000

GAFTECH Corporation            Delaware                      10                333-58442-01/             1361 Alps Road
                                                                               22-2811609                Wayne, NJ  07470
                                                                                                         (973) 628-3000

LL Building Products Inc.      Delaware                      10                333-58442-06/             4501 Circle 75 Parkway
                                                                               58-2394554                Atlanta, GA 30339
                                                                                                         (770) 953-6366

Wind Gap Real Property         Delaware                      10                333-58442-07/             1361 Alps Road
Acquisition Corp.                                                              22-3383681                Wayne, NJ  07470
                                                                                                         (973) 628-3000











                                       2





                        Part I - FINANCIAL INFORMATION
                        Item 1 - FINANCIAL STATEMENTS


                   BUILDING MATERIALS CORPORATION OF AMERICA

                 CONSOLIDATED STATEMENTS OF INCOME (Unaudited)





                                       Second Quarter Ended   Six Months Ended
                                       --------------------   ----------------
                                        July 2,   July 1,     July 2,   July 1,
                                         2000      2001        2000      2001
                                        --------  --------   -------   -------
                                                       (Thousands)
                                                           
Net sales ............................. $325,774  $354,925   $615,590  $619,886
                                        --------  --------   --------  --------
Costs and expenses:
  Cost of products sold ...............  230,301   254,185    444,658   453,135
  Selling, general and administrative..   66,319    67,989    126,469   123,971
  Goodwill amortization ...............      508       516      1,024     1,010
                                        -------   --------   --------  --------
    Total costs and expenses...........  297,128   322,690    572,151   578,116
                                        --------  --------   --------  --------

Operating income ......................   28,646    32,235     43,439    41,770
Interest expense ......................  (12,534)  (15,399)   (24,979)  (30,603)
Other expense, net.....................   (2,250)   (1,985)    (3,414)   (3,468)
                                         -------  --------   --------  --------
Income before income taxes ............   13,862    14,851     15,046     7,699
Income taxes......... .................   (5,129)   (5,495)    (5,567)   (2,849)
                                        --------  --------   --------  --------

Net income............................. $  8,733  $  9,356   $  9,479  $  4,850
                                        ========  ========   ========  ========







The accompanying Notes to Consolidated Financial Statements are
an integral part of these statements.





                                       3





                   BUILDING MATERIALS CORPORATION OF AMERICA

                          CONSOLIDATED BALANCE SHEETS
                                                                     July 1,
                                                     December 31,     2001
                                                         2000      (Unaudited)
                                                     ------------   ---------
ASSETS                                                      (Thousands)
Current Assets:
  Cash and cash equivalents.........................  $  82,747     $  53,934
  Accounts receivable, trade, net...................     19,474        29,227
  Accounts receivable, other........................     51,843        85,759
  Tax receivable from parent corporations...........      1,500             -
  Inventories.......................................    101,702       110,427
  Other current assets..............................      3,925         6,732
                                                      ---------     ---------
    Total Current Assets............................    261,191       286,079
Property, plant and equipment, net..................    362,464       352,450
Excess of cost over net assets of businesses
  acquired, net ....................................     65,317        64,307
Deferred income tax benefits........................     42,897        40,603
Tax receivable from parent corporations.............      7,500         9,000
Other assets........................................     31,800        30,971
                                                      ---------     ---------
Total Assets........................................  $ 771,169     $ 783,410
                                                      =========     =========
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current Liabilities:
    Current maturities of long-term debt............  $   5,908     $   5,362
  Accounts payable..................................     57,520        66,976
  Payable to related parties........................     10,052        16,465
  Accrued liabilities...............................     42,888        44,540
  Reserve for product warranty claims...............     14,900        14,900
                                                       --------     ---------
    Total Current Liabilities.......................    131,268       148,243
                                                      ---------     ---------
Long-term debt less current maturities..............    674,698       671,298
                                                      ---------     ---------
Reserve for product warranty claims.................     28,756        23,625
                                                      ---------     ---------
Other liabilities...................................     14,312        14,508
                                                      ---------     ---------
Stockholders' Equity (Deficit):
  Series A Cumulative Redeemable Convertible
    Preferred Stock, $.01 par value per share;
    400,000 shares authorized; no shares issued.....          -             -
  Class A Common Stock, $.001 par value per share;
    1,300,000 shares authorized; 1,015,514 and
    1,015,010 shares, issued and outstanding,
    respectively ...................................          1             1
  Class B Common Stock, $.001 par value per share;
    100,000 shares authorized; 15,000 shares
    issued and outstanding .........................          -             -
  Accumulated deficit...............................    (77,866)      (74,265)
                                                      ---------     ---------
    Total Stockholders' Equity (Deficit)............    (77,865)      (74,264)
                                                      ---------     ---------
 Total Liabilities and Stockholders'
  Equity (Deficit)..................................  $ 771,169     $ 783,410
                                                      =========     =========

The accompanying Notes to Consolidated Financial Statements are an integral part
of these statements.

                                       4



                   BUILDING MATERIALS CORPORATION OF AMERICA

               CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

                                                           Six Months Ended
                                                          -------------------
                                                           July 2,    July 1,
                                                            2000       2001
                                                          --------   --------
                                                             (Thousands)

Cash and cash equivalents, beginning of period........... $ 55,952  $  82,747
                                                          --------   --------

Cash provided by (used in) operating activities:
  Net income ............................................    9,479      4,850
  Adjustments to reconcile net income to
   net cash used in operating activities:
      Depreciation ......................................   18,527     17,520
      Goodwill and other amortization....................    1,439      1,819
      Deferred income taxes..............................        -      2,294
      Noncash interest charges...........................      966      2,187
  Increase in working capital items......................  (68,560)   (94,041)
  Decrease in reserve for product warranty claims........   (3,634)    (5,131)
  Purchases of trading securities........................   (1,019)         -
  Proceeds from sales of trading securities..............    1,860          -
  Change in net receivable from/payable to related
    parties/parent corporations..........................  (11,209)     6,362
  Other, net.............................................    4,862       (508)
                                                          --------   --------
Net cash used in operating activities....................  (47,289)   (64,648)
                                                          --------   --------

Cash provided by (used in) investing activities:
  Capital expenditures...................................  (28,703)    (7,277)
  Proceeds from sale of assets...........................    4,607          -
  Purchases of available-for-sale securities.............     (400)         -
  Proceeds from sales of available-for-sale securities...    3,643          -
  Proceeds from sales of other short-term investments....    1,590          -
                                                          --------   --------

Net cash used in investing activities....................  (19,263)    (7,277)
                                                          --------   --------
Cash provided by (used in) financing activities:
  Proceeds from sale of accounts receivable..............   41,593     49,999
  Increase (decrease)in borrowings under revolving
    credit facilities....................................   40,000     (1,000)
  Repayments of long-term debt...........................   (2,363)    (3,339)
  Distributions to parent corporations...................        -     (1,249)
  Proceeds from issuance of common stock.................     (891)         -
  Financing fees and expenses............................   (4,072)    (1,299)
                                                          --------   --------
Net cash provided by financing activities................   74,267     43,112
                                                          --------   --------
Net change in cash and cash equivalents..................    7,715    (28,813)
                                                          --------   --------
Cash and cash equivalents, end of period................. $ 63,667   $ 53,934
                                                          ========   ========
Supplemental Cash Flow Information:
  Cash paid during the period for:
    Interest (net of amount capitalized)................. $ 25,032   $ 31,345
    Income taxes.........................................    6,456        603



The accompanying Notes to Consolidated Financial Statements are
an integral part of these statements.


                                       5



                   BUILDING MATERIALS CORPORATION OF AMERICA

                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

     Building  Materials  Corporation  of America (the  "Company" or the "Parent
Company")  was formed on January 31, 1994 and is a  wholly-owned  subsidiary  of
BMCA Holdings  Corporation  ("BHC"),  which is a wholly-owned  subsidiary of G-I
Holdings Inc. ("G-I  Holdings").  The consolidated  financial  statements of the
Company  reflect,  in the opinion of management,  all  adjustments  necessary to
present  fairly the financial  position of the Company at July 1, 2001,  and the
results of operations and cash flows for the periods ended July 2, 2000 and July
1, 2001. All  adjustments  are of a normal  recurring  nature.  These  financial
statements  should be read in conjunction with the annual  financial  statements
and notes thereto  included in the Company's  Annual Report on Form 10-K for the
fiscal year ended December 31, 2000 (the "Form 10-K").

         Certain  reclassifications  have been made to conform  to current  year
presentation.

Note 1.  Comprehensive Income


                                         Second Quarter Ended     Six Months Ended
                                         --------------------     -----------------
                                           July 2,   July 1,      July 2,   July 1,
                                            2000      2001         2000      2001
                                           ------    ------       ------    ------
                                                        (Thousands)
                                                                
Net income...............................  $ 8,733   $ 9,356     $ 9,479    $ 4,850
                                           -------   -------     -------    -------
Other comprehensive income net of tax:
  Change in unrealized gains (losses) on
    available-for-sale securities:
  Unrealized holding gains
    arising during the period, net of
    income taxes of $2,546, $0, $3,495
    and $0, respectively.................    4,335         -       5,952          -
  Less:  Reclassification adjustment
    for gains included in net
    income, net of income taxes
    of $(57), $0, $201
    and $0, respectively.................      (97)        -         342          -
                                           -------   -------     -------    -------
Total other comprehensive income.........    4,432         -       5,610          -
                                           -------   -------     -------    -------
Comprehensive income.....................  $13,165   $ 9,356     $15,089    $ 4,850
                                           =======   =======     =======    =======


Note 2.   Inventories

     Inventories consist of the following:
                                                  December 31,      July 1,
                                                    2000             2001
                                                  -----------      --------
                                                           (Thousands)

         Finished goods ..................         $ 61,606        $ 72,139
         Work-in-process .................           16,938          10,464
         Raw materials and supplies ......           27,743          32,409
                                                   --------        --------
         Total ...........................          106,287         115,012
         Less LIFO reserve ...............           (4,585)         (4,585)
                                                   --------        --------
         Inventories .....................         $101,702        $110,427
                                                   ========        ========

                                       6





            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)



Note 3.   Contingencies

Asbestos Litigation Against G-I Holdings

         In connection with its formation, the Company contractually assumed and
agreed to pay the first  $204.4  million  of  liabilities  for  asbestos-related
bodily injury claims  relating to the  inhalation of asbestos  fiber  ("Asbestos
Claims") of its parent, G-I Holdings. As of March 30, 1997, the Company had paid
all of its assumed asbestos-related  liabilities.  In January 2001, G-I Holdings
filed a  voluntary  petition  for  reorganization  under  Chapter 11 of the U.S.
Bankruptcy Code due to its Asbestos Claims.  This proceeding is in a preliminary
stage.

         Claimants in the G-I Holdings bankruptcy, including judgment creditors,
might seek to satisfy their claims by asking the bankruptcy court to require the
sale of G-I Holdings'  assets,  including its holdings of BHC's common stock and
its indirect holdings of the Company's common stock. Such action could result in
a change of control of the Company.  In addition,  those  claimants  may seek to
file Asbestos  Claims  against the Company (with 1,853 alleged  Asbestos  Claims
pending  against the Company as of July 1, 2001).  The Company  believes that it
will  not  sustain  any  liability  in  connection   with  these  or  any  other
asbestos-related  claims.  Furthermore,  on February 2, 2001,  the United States
Bankruptcy  Court for the District of New Jersey issued a temporary  restraining
order  enjoining any existing or future  claimant from bringing  Asbestos Claims
against the Company. On June 22, 2001, following a hearing, the Bankruptcy Court
converted  the temporary  restraints  into a  preliminary  injunction,  which is
expected  to remain  in  effect  pending  confirmation  of a Chapter  11 plan of
reorganization  for the G-I Holdings  estate.  On February 7, 2001, G-I Holdings
filed a defendant  class action in the United  States  Bankruptcy  Court for the
District of New Jersey  seeking a  declaratory  judgment that the Company has no
successor  liability for Asbestos Claims against G-I Holdings and that it is not
the alter ego of G-I  Holdings.  This  action is in a  preliminary  stage and no
trial date has been set by the court. As a result, it is not possible to predict
the outcome of this  litigation.  While the Company cannot  predict  whether any
additional  Asbestos  Claims will be asserted  against it, or the outcome of any
litigation   relating  to  those  claims,  the  Company  believes  that  it  has
meritorious  defenses  to any  claim  that  it has  asbestos-related  liability,
although there can be no assurances in this regard.

     On February 8, 2001, a creditors  committee  established  in G-I  Holdings'
bankruptcy case filed a complaint in the United States  Bankruptcy Court for the
District of New Jersey  against G-I  Holdings  and the  Company.  The  complaint
requests substantive  consolidation of the Company with G-I Holdings or an order
directing G-I Holdings to cause the Company to file for  bankruptcy  protection.
The  Company and G-I  Holdings  intend to  vigorously  defend the  lawsuit.  The
Company  believes  that no  basis  exists  for the  court to  grant  the  relief
requested.  The plaintiffs  also filed for interim relief absent the granting of
their requested  relief described above. On March 21, 2001, the Bankruptcy Court
refused to grant the requested interim relief.

                                       7


            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 3.   Contingencies (continued)

         For a further  discussion  with respect to the history of the foregoing
litigation and  asbestos-related  matters,  see Item 3,"Legal  Proceedings," and
Notes  3,  11 and  16 to  Consolidated  Financial  Statements  contained  in the
Company's Form 10-K.


Environmental Litigation

     The  Company,  together  with other  companies,  is a party to a variety of
proceedings  and  lawsuits  involving   environmental  matters   ("Environmental
Claims"),  in which  recovery is sought for the cost of cleanup of  contaminated
sites,  a number of which  Environmental  Claims are in the early stages or have
been dormant for protracted periods. At most sites, the Company anticipates that
liability will be apportioned  among the companies  found to be responsible  for
the presence of hazardous  substances at the site. The Company believes that the
ultimate disposition of such matters will not, individually or in the aggregate,
have a material adverse effect on the liquidity,  financial  position or results
of operations of the Company.

     For  further  information   regarding   environmental   matters  and  other
litigation,  reference is made to Item 3, "Legal  Proceedings"  contained in the
Company's Form 10-K.


Tax Claim Against G-I Holdings

     On  September  15, 1997,  G-I Holdings  received a notice from the Internal
Revenue  Service  (the  "IRS") of a  deficiency  in the amount of $84.4  million
(after  taking  into  account  the use of net  operating  losses and foreign tax
credits  otherwise  available  for use in later  years) in  connection  with the
formation  in  1990  of  Rhone-Poulenc   Surfactuants   and  Specialties,   L.P.
(the"surfactants  partnership"),  a  partnership  in which G-I Holdings  held an
interest.  The claim of the IRS for  interest and  penalties,  after taking into
account the effect on the use of net  operating  losses and foreign tax credits,
could result in G-I Holdings  incurring  liabilities  significantly in excess of
the  deferred  tax  liability  of $131.4  million  that it  recorded  in 1990 in
connection  with this  matter.  G-I  Holdings  has advised  the Company  that it
believes that it will prevail in this matter, although there can be no assurance
in this  regard.  The Company  believes  that the ultimate  disposition  of this
matter  will not have a  material  adverse  effect  on its  business,  financial
position or results of operations.  For the possible consequences to the Company
of the failure of G-I Holdings to satisfy this  liability and other  information
relating to G-I Holdings, see "Asbestos Litigation Against G-I Holdings" above.


Note 4.  New Accounting Standards

     On June 30, 2001, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards ("SFAS") No. 141, "Business  Combinations" and
SFAS No. 142, "Goodwill and Other Intangible Assets".  SFAS No. 141 requires all
business  combinations  initiated  after June 30, 2001 to be accounted for using
the purchase method of accounting and eliminates the

                                       8


            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 4.  New Accounting Standards (continued)

pooling  method  of  accounting.  SFAS No.  141 will not have an  impact  on the
Company's business since the Company has historically accounted for all business
combinations using the purchase method of accounting.  With the adoption of SFAS
No.  142,  effective  January  1,  2002,  goodwill  will no longer be subject to
amortization over its estimated useful life.  However,  goodwill will be subject
to at  least  an  annual  assessment  for  impairment  and  more  frequently  if
circumstances   indicate  a  possible  impairment.   Companies  must  perform  a
fair-value-based  goodwill impairment test. In addition,  under SFAS No. 142, an
acquired intangible asset should be separately  recognized if the benefit of the
intangible is obtained  through  contractual  or other legal  rights,  or if the
intangible  asset can be sold,  transferred,  licensed,  rented,  or  exchanged.
Intangible  assets will be amortized over their useful lives.  Early adoption of
SFAS No. 142 is not  permitted.  On an annualized  basis,  effective  January 1,
2002,  the  Company's net income will  increase by  approximately  $1.3 million,
unless any impairment charges are necessary.

Note 5.  Guarantor Financial Information

         All  of  the  Company's  subsidiaries,   other  than  BMCA  Receivables
Corporation, are guarantors under the Company's $100 million secured bank credit
facility,  the amended and restated $110 million  secured bank credit  facility,
the 10 1/2% Senior Notes due 2003,  the 7 3/4% Senior Notes due 2005, the 8 5/8%
Senior Notes due 2006, the 8% Senior Notes due 2007 (the "2007 Notes"),  and the
8% Senior Notes due 2008. These guarantees are full, unconditional and joint and
several. In addition,  Building Materials  Manufacturing  Corporation ("BMMC") a
wholly-owned subsidiary of the Company, is a co-obligor on the 2007 Notes.

         The Company and BMMC entered into license agreements, effective January
1,  1999,  for  the  right  to use  intellectual  property,  including  patents,
trademarks,   know-how,   and  franchise  rights  owned  by  Building  Materials
Investment Corporation,  a wholly-owned subsidiary of the Company, for a license
fee stated as a percentage  of net sales.  These  license  agreements  are for a
period of one year and are subject to  automatic  renewal  unless  either  party
terminates with 60 days written notice.  Also,  effective  January 1, 1999, BMMC
sells all finished goods to the Company at a manufacturing profit.

         In January 2001,  certain  subsidiaries of the Company were merged into
BMMC,  and  accordingly,  certain  reclassifications  were made to the guarantor
financial statements to conform with current period presentations.

         Presented below is condensed  consolidating  financial  information for
the  Company,  the  guarantor  subsidiaries  and  the  non-guarantor  subsidiary
prepared on a basis which retroactively reflects the formation of such companies
for  all  periods  presented.  This  financial  information  should  be  read in
conjunction with the Consolidated  Financial  Statements and other notes related
thereto. Separate financial information for the Company's guarantor subsidiaries
and  non-guarantor  subsidiary is not included  herein  because  management  has
determined that such information is not material to investors.


                                       9





            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

Note 5.  Guarantor Financial Information - (Continued)



                   Building Materials Corporation of America
                  Condensed Consolidating Statement of Income
                       Second Quarter Ended July 2, 2000
                                  (Thousands)
                                  (Unaudited)






                                       Parent        Guarantor
                                       Company       Subsidiaries     Eliminations     Consolidated
                                       ---------     ------------     ------------     ------------
                                                                              
Net sales............................. $ 283,800      $  41,974        $      -           $325,774
Intercompany net sales................    29,064        202,174        (231,238)                 -
                                       ---------      ---------        --------           --------
Total net sales.......................   312,864        244,148        (231,238)           325,774
                                       ---------      ---------        --------           --------

Costs and expenses:
  Cost of products sold...............   215,154        246,385        (231,238)           230,301
  Selling, general and administrative.    42,808         23,511                             66,319
  Goodwill amortization...............       326            182                                508
                                       ---------      ---------        --------           --------
Total costs and expenses..............   258,288        270,078        (231,238)           297,128
                                       ---------      ---------        --------           --------

Operating income (loss)...............    54,576        (25,930)              -             28,646

Equity in earnings (losses)
  of subsidiaries.....................   (13,303)                        13,303                  -
Intercompany licensing income
  (expense), net......................    (7,886)         7,886                                  -
Interest expense, net.................    (8,208)        (4,326)                           (12,534)
Other income (expense), net...........    (2,511)           261                             (2,250)
                                       ---------      ---------        --------           --------
Income (loss) before income taxes.....    22,668        (22,109)         13,303             13,862
Income tax (provision) benefit........   (13,935)         8,806                             (5,129)
                                       ---------      ---------        --------           --------
Net income (loss)..................... $   8,733      $ (13,303)       $ 13,303           $  8,733
                                       =========      =========        ========           ========



                                       10




            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

Note 5.  Guarantor Financial Information - (Continued)




                   Building Materials Corporation of America
                  Condensed Consolidating Statement of Income
                       Second Quarter Ended July 1, 2001
                                  (Thousands)
                                  (Unaudited)




                                       Parent       Guarantor
                                       Company      Subsidiaries     Eliminations     Consolidated
                                       ---------    ------------     ------------     ------------
                                                                           
Net sales............................. $ 323,947     $  30,978       $       -         $ 354,925
Intercompany net sales................    29,067       234,932        (263,999)                -
                                       ---------     ---------       ---------         ---------
Total net sales.......................   353,014       265,910        (263,999)          354,925
                                       ---------     ---------       ---------         ---------

Costs and expenses:
  Cost of products sold...............   266,242       251,942        (263,999)          254,185
  Selling, general and administrative.    49,744        18,245                            67,989
  Goodwill amortization...............       337           179                               516
                                       ---------      ---------       ---------          -------
Total costs and expenses..............   316,323       270,366        (263,999)          322,690
                                       ---------      ---------       ---------          -------
Operating income (loss)...............    36,691        (4,456)              -            32,235

Equity in earnings of subsidiaries....       818                          (818)                -
Intercompany licensing income
  (expense), net......................    (9,718)        9,718                                 -
Interest expense, net.................   (11,177)       (4,222)                          (15,399)
Other income (expense), net...........    (2,243)          258                            (1,985)
                                       ---------     ---------       ---------          --------

Income (loss) before income taxes.....    14,371         1,298            (818)           14,851
Income taxes .........................    (5,015)         (480)                           (5,495)
                                       ---------     ---------       ---------          --------

Net income (loss).....................  $  9,356     $     818       $    (818)         $  9,356
                                        ========     =========       ==========         ========






                                       11





            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

Note 5.  Guarantor Financial Information - (Continued)



                   Building Materials Corporation of America
                  Condensed Consolidating Statement of Income
                         Six Months Ended July 2, 2000
                                  (Thousands)
                                  (Unaudited)





                                       Parent        Guarantor
                                       Company       Subsidiaries     Eliminations     Consolidated
                                       ---------     ------------     ------------     ------------
                                                                              
Net sales............................. $ 543,586      $  72,004        $      -           $615,590
Intercompany net sales................    31,285        374,901        (406,186)              -
                                       ---------      ---------        --------           --------
Total net sales.......................   574,871        446,905        (406,186)           615,590
                                       ---------      ---------        --------           --------

Costs and expenses:
  Cost of products sold...............   423,277        427,567        (406,186)           444,658
  Selling, general and administrative.    86,521         39,948                            126,469
  Goodwill amortization...............       652            372                              1,024
                                       ---------      ---------        --------           --------
Total costs and expenses..............   510,450        467,887        (406,186)           572,151
                                       ---------      ---------        --------           --------

Operating income (loss)...............    64,421        (20,982)              -             43,439

Equity in earnings (losses)
  of subsidiaries.....................   (10,936)                        10,936                  -
Intercompany licensing income
  (expense), net......................   (14,988)        14,988                                      -
Interest expense, net.................   (12,517)       (12,462)                           (24,979)
Other income (expense), net...........    (4,512)         1,098                             (3,414)
                                       ---------      ---------        --------           --------
Income (loss) before income taxes.....    21,468        (17,358)         10,936             15,046
Income tax (provision) benefit........   (11,989)         6,422                             (5,567)
                                       ---------      ---------        --------           --------
Net income (loss)..................... $   9,479      $ (10,936)       $ 10,936           $  9,479
                                       =========      =========        ========           ========






                                       12





            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

Note 5.  Guarantor Financial Information - (Continued)




                   Building Materials Corporation of America
                  Condensed Consolidating Statement of Income
                         Six Months Ended July 1, 2001
                                  (Thousands)
                                  (Unaudited)




                                       Parent       Guarantor
                                       Company      Subsidiaries     Eliminations     Consolidated
                                       ---------    ------------     ------------     ------------
                                                                           
Net sales............................. $ 565,342     $  54,544       $       -         $ 619,886
Intercompany net sales................    53,297       423,307        (476,604)                -
                                       ---------     ---------       ---------         ---------
Total net sales.......................   618,639       477,851        (476,604)          619,886
                                       ---------     ---------       ---------         ---------

Costs and expenses:
  Cost of products sold...............   478,324       451,415        (476,604)          453,135
  Selling, general and administrative.    90,281        33,690                           123,971
  Goodwill amortization...............       651           359                             1,010
                                       ---------      ---------      ---------          --------
Total costs and expenses..............   569,256       485,464        (476,604)          578,116
                                       ---------      ---------      ---------          --------
Operating income (loss)...............    49,383        (7,613)              -            41,770

Equity in earnings of subsidiaries....     1,031                        (1,031)                -
Intercompany licensing income
  (expense), net......................   (16,960)       16,960                                 -
Interest expense, net.................   (22,002)       (8,601)                          (30,603)
Other income (expense), net...........    (4,358)          890                            (3,468)
                                       ---------     ---------       ---------          --------

Income (loss) before income taxes.....     7,094         1,636          (1,031)            7,699
Income taxes..........................    (2,244)         (605)                           (2,849)
                                       ---------     ---------       ---------          --------

Net income (loss).....................  $  4,850     $   1,031       $  (1,031)         $  4,850
                                        ========     =========       ==========         ========







                                       13





            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

Note 5.  Guarantor Financial Information - (Continued)



                   Building Materials Corporation of America
                     Condensed Consolidating Balance Sheet
                               December 31, 2000
                                  (Thousands)




                                                                     Non-
                                          Parent    Guarantor      Guarantor       Elim-
                                          Company   Subsidiaries  Subsidiary    inations   Consolidated
                                          --------- ------------- ------------ ----------- ------------
                                                                             
ASSETS
Current Assets:
  Cash and cash equivalents............... $   9,741   $ 73,006    $      -    $        -   $ 82,747
  Accounts receivable, trade, net.........               19,474                               19,474
  Accounts receivable, other..............     5,027      2,947      43,869                   51,843
  Tax receivable from parent corporations.     1,500                                           1,500
  Inventories.............................    55,891     45,811                              101,702
  Other current assets....................     1,105      2,820                                3,925
                                             -------   ---------   ---------    ---------   --------
    Total Current Assets..................    73,264    144,058      43,869             -    261,191

Investment in subsidiaries................   356,726                            (356,726)          -
Intercompany loans including accrued
  interest................................   188,945   (184,531)     (4,414)                       -
Due from(to)subsidiaries, net.............  (233,236)   229,273       3,963                        -
Property, plant and equipment, net........    46,928    315,536                              362,464
Excess of cost over net assets of
  businesses acquired, net................    41,562     23,755                               65,317
Deferred income tax benefits..............    42,897                                          42,897
Tax receivable from parent corporations...     7,500                                           7,500
Other assets..............................    16,026     15,774                               31,800
                                           ---------   ---------  ---------    ---------   ---------
Total Assets.............................. $ 540,612  $ 543,865   $  43,418    $(356,726)  $ 771,169
                                           =========  =========   =========    =========   =========

LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current Liabilities:
  Current maturities of long-term debt.... $     153  $   5,755   $       -    $       -   $   5,908
  Accounts payable........................    19,871     37,649                               57,520
  Payable to related parties..............     7,522      2,530                               10,052
  Accrued liabilities.....................    18,865     24,023                               42,888
  Reserve for product warranty claims.....    14,900                                          14,900
                                           ---------  ---------    ---------    ---------   --------
    Total Current Liabilities.............    61,311     69,957           -            -     131,268

Long-term debt less current maturities....   514,880    159,818                              674,698
Reserve for product warranty claims.......    28,187        569                               28,756
Other liabilities.........................    14,099        213                               14,312
                                           ---------  ---------    ---------    ---------   --------
Total Liabilities.........................   618,477    230,557           -            -     849,034
Total Stockholders' Equity (Deficit), net.   (77,865)   313,308      43,418     (356,726)    (77,865)
Total Liabilities and                      ---------  ---------    ---------    ---------   --------
  Stockholders' Equity (Deficit) ......... $ 540,612  $ 543,865    $ 43,418    $(356,726)  $ 771,169
                                           =========  =========    =========   ==========  =========



                                       14







            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

Note 5.  Guarantor Financial Information - (Continued)



                   Building Materials Corporation of America
                     Condensed Consolidating Balance Sheet
                                  July 1, 2001
                                   (Thousands)
                                   (Unaudited)



                                                                     Non-
                                          Parent    Guarantor      Guarantor       Elim-
                                          Company   Subsidiaries   Subsidiary   inations   Consolidated
                                          --------- ------------- ------------ ----------- ------------
                                                                           
ASSETS
Current Assets:
  Cash and cash equivalents...............$       13  $  53,921   $      -     $      -   $   53,934
  Accounts receivable, trade, net.........               29,227                               29,227
  Accounts receivable, other..............     2,251      1,387      82,121                   85,759
  Inventories.............................    70,149     40,278                              110,427
  Other current assets....................     2,979      3,753                                6,732
                                           ---------   --------   ---------    ---------   ---------
    Total Current Assets..................    75,392    128,566      82,121            -     286,079

Investment in subsidiaries................   404,435                            (404,435)          -
Intercompany loans including accrued
  interest................................    77,737    (73,323)     (4,414)                       -
Due from(to)subsidiaries, net.............  (159,760)   147,370      12,390                        -
Property, plant and equipment, net........    45,735    306,715                              352,450
Excess of cost over net assets of
  businesses acquired, net................    40,731     23,576                               64,307
Deferred income tax benefits..............    40,603          -                               40,603
Tax receivable from parent corporations...     9,000                                           9,000
Other assets..............................    15,110     15,861                               30,971
                                           ---------  ---------   ---------    ---------   ---------
Total Assets.............................. $ 548,983  $ 548,765   $  90,097    $(404,435)  $ 783,410
                                           =========  =========   =========    =========   =========

LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current Liabilities:
  Current maturities of long-term debt.... $      69  $   5,293   $       -    $       -   $   5,362
  Accounts payable........................    24,149     42,827                               66,976
  Payable to related parties..............     2,441     14,024                               16,465
  Accrued liabilities.....................    29,098     15,442                               44,540
  Reserve for product warranty claims.....    14,900          -                               14,900
                                           ---------  ---------   ---------    ---------    ---------
    Total Current Liabilities.............    70,657     77,586           -            -     148,243

Long-term debt less current maturities....   514,126    157,172                              671,298
Reserve for product warranty claims.......    24,161       (536)                              23,625
Other liabilities.........................    14,303        205                               14,508
                                           ---------  ---------   ---------    ---------   ---------
Total Liabilities.........................   623,247    234,427           -            -     857,674
Total Stockholders' Equity (Deficit), net.   (74,264)   314,338      90,097     (404,435)    (74,264)
                                           ---------  ---------   ---------    ---------   ---------
Total Liabilities and Stockholders'
    Equity (Deficit) ..................... $ 548,983  $ 548,765    $ 90,097    $(404,435)  $ 783,410
                                           =========  =========    ========    =========   =========






                                       15




            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)


Note 5.  Guarantor Financial Information - (Continued)



                   Building Materials Corporation of America
                Condensed Consolidating Statement of Cash Flows
                         Six Months Ended July 2, 2000
                                  (Thousands)
                                  (Unaudited)



                                                                                  Non-
                                                      Parent     Guarantor     Guarantor
                                                      Company   Subsidiaries   Subsidiary   Consolidated
                                                      --------- ------------   ----------   ------------
                                                                                  
Cash and cash equivalents, beginning of period....... $     203   $  55,749     $       -     $ 55,952
                                                      ---------   ---------     ---------     --------
Cash provided by(used in)operating activities:
Net income(loss).....................................    20,415     (10,936)                     9,479
Adjustments to reconcile net income(loss)to net
  cash provided by(used in)operating activities:
    Depreciation.....................................     1,868      16,659                     18,527
    Goodwill and other amortization..................       735         704                      1,439
    Deferred income taxes............................                                                -
    Noncash interest charges.........................       966                                    966
(Increase) decrease in working capital items.........   (46,933)     (6,902)      (14,725)     (68,560)
Decrease in product warranty claims..................   (11,788)      8,154                     (3,634)
Purchases of trading securities......................                (1,019)                    (1,019)
Proceeds from sales of trading securities............                 1,860                      1,860
Change in net receivable from/payable to
  related parties/parent corporations................   (49,110)     23,176        14,725      (11,209)
Other, net...........................................     6,704      (1,842)                     4,862
                                                      ---------   ---------     ---------     --------
Net cash provided by(used in)operating activities....   (77,143)     29,854             -      (47,289)
                                                      ---------   ---------     ---------     --------
Cash provided by(used in)investing activities:
  Capital expenditures...............................      (271)    (28,432)                   (28,703)
  Proceeds from sale of assets.......................                 4,607                      4,607
  Purchases of available-for-sale securities.........                  (400)                      (400)
  Proceeds from sales of available-for-sale
    securities.......................................                 3,643                      3,643
  Proceeds from sales of other short-term
    investments......................................                 1,590                      1,590
                                                      ---------   ---------     ---------     --------
Net cash used in investing activities................      (271)    (18,992)            -      (19,263)
                                                      ---------   ---------     ---------     --------

Cash provided by(used in)financing activities:
  Proceeds from sale of accounts receivable..........    41,593                                 41,593
  Increase in borrowings under revolving
    credit facility..................................    40,000                                 40,000
  Repayments of long-term debt.......................      (552)     (1,811)                    (2,363)
  Financing fees and expenses........................    (2,926)     (1,146)                    (4,072)
  Stock Issuance.....................................      (891)                                  (891)
                                                     ----------   ---------     ---------     --------
Net cash provided by (used in) financing activities..    77,224      (2,957)            -       74,267
                                                      ---------   ---------     ---------     --------
Net change in cash and cash equivalents..............      (190)      7,905             -        7,715
                                                      ---------   ---------     ---------     --------
Cash and cash equivalents, end of period............. $      13   $  63,654   $         -    $  63,667
                                                      =========   =========     =========     ========





                                       16






            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)


Note 5.  Guarantor Financial Information - (Continued)



                   Building Materials Corporation of America
                Condensed Consolidating Statement of Cash Flows
                         Six Months Ended July 1, 2001
                                  (Thousands)
                                  (Unaudited)



                                                                                  Non-
                                                      Parent    Guarantor      Guarantor
                                                      Company  Subsidiaries   Subsidiary   Consolidated
                                                      -------  ------------   -----------  ------------
                                                                                
Cash and cash equivalents, beginning of period....... $  9,741    $  73,006    $       -    $ 82,747
                                                      --------    ---------    ---------    --------
Cash provided by (used in) operating activities:
Net income...........................................    3,820        1,030                    4,850
Adjustments to reconcile net income(loss)to net
  cash provided by(used in)operating activities:
    Depreciation.....................................    1,367       16,153                   17,520
    Goodwill and other amortization..................    1,460          359                    1,819
    Deferred income taxes............................    2,294                                 2,294
    Noncash interest charges.........................    1,578          609                    2,187
Increase in working capital items....................  (48,793)      (6,996)     (38,252)    (94,041)
Decrease in product warranty claims..................   (4,026)      (1,105)                  (5,131)
Change in net receivable from/payable to
  related parties/parent corporations................  (14,079)     (17,811)      38,252       6,362
Other, net...........................................       (4)        (504)                    (508)
                                                      --------     --------    ---------    --------
Net cash used in operating activities................  (56,383)      (8,265)           -     (64,648)
                                                      --------     --------    ---------    --------
Cash provided by(used in)investing activities:
  Capital expenditures...............................     (173)      (7,104)                  (7,277)
                                                      --------     --------    ---------    --------
Net cash used in investing activities................     (173)      (7,104)           -      (7,277)
                                                      --------     --------    ---------    --------

Cash provided by (used in) financing activities:
  Proceeds from sale of accounts receivable..........   49,999                                49,999
  Increase in borrowings under revolving
    credit facility..................................   (1,000)                               (1,000)
  Repayments of long-term debt.......................      (97)      (3,242)                  (3,339)
  Distributions to parent corporations...............   (1,249)                               (1,249)
  Financing fees and expenses........................     (825)        (474)                  (1,299)
                                                      --------    ---------    ---------   ---------
Net cash provided by (used in) financing activities..   46,828       (3,716)           -      43,112
                                                      --------    ---------    ---------   ---------
Net change in cash and cash equivalents..............   (9,728)     (19,085)           -     (28,813)
                                                      --------    ---------    ---------   ---------
Cash and cash equivalents, end of period............. $     13    $  53,921    $       -   $  53,934
                                                      ========    =========    =========   =========





                                       17






           Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                     CONDITION AND RESULTS OF OPERATIONS

Results of Operations - Second Quarter 2001 Compared With
                        Second Quarter 2000

         The Company recorded second quarter net income of $9.4 million compared
with net income of $8.7 million in the second  quarter of 2000.  The increase in
net earnings was primarily the result of higher operating income and lower other
expenses, partially offset by higher interest expense.

         The  Company's  net sales for the second  quarter  of 2001 were  $354.9
million,  an 8.9 % increase from last year's second  quarter net sales of $325.8
million,  with the  increase  primarily  due to net sales  gains in steep  slope
roofing products, partially offset by the sale of the security products business
of LL Building Products Inc. which was sold in September 2000. Excluding the net
sales of the security products business in the second quarter of 2000, net sales
were higher by 12.6% for the second  quarter of 2001.  The increase in net sales
of steep slope roofing products reflected higher unit volumes,  partially offset
by slightly lower average selling prices.

         Operating  income  in the  second  quarter  of 2001 was  $32.2  million
compared with $28.6 million in the second quarter of 2000, an increase of 12.6%.
Higher  operating  results were primarily  attributable  to an increase in steep
slope roofing products sales volumes, partially offset by slightly lower average
selling prices for both steep slope and low slope roofing  products and the sale
of the security products business of LL Building Products Inc. Selling,  general
and administrative  expenses for the second quarter of 2001 improved to 19.3% of
net  sales  compared  to  20.5%  of net  sales in the  second  quarter  of 2000,
primarily a result of cost reduction programs instituted in the third and fourth
quarters of 2000.

         Interest expense for the quarter  increased to $15.4 million from $12.5
million  recorded in the same period of 2000,  primarily  due to higher  average
borrowings  and  lower  capitalized  interest  in 2001.  The  lower  capitalized
interest in 2001 is the result of the  completion of  construction  of three new
manufacturing facilities in the second half of 2000. Other expense, net was $2.0
million for the second quarter of 2001 compared with $2.3 million in 2000.


Results of Operations -    Six Months 2001 Compared With
                           Six Months 2000

         For the first six months of 2001,  the Company  recorded  net income of
$4.9 million  compared  with $9.5 million in 2000.  The decrease in net earnings
was primarily  the result of higher  interest  expense and, to a lesser  extent,
lower operating income due to lower first quarter of 2001 operating results.

         The Company's net sales for the first half of 2001 were $619.9  million
compared to $615.6  million in the same period of 2000.  Excluding the net sales
of the security  products business of LL Building Products Inc. in the first six
months of 2000,  net sales were higher by 3.5% for the first six months of 2001.
Net sales gains in steep slope roofing  products were partially  offset by lower
net sales in low slope roofing products and the sale of the security products

                                       18


           Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                   CONDITION AND RESULTS OF OPERATIONS (continued)

business of LL Building  Products  Inc. The increase in net sales of steep slope
roofing products primarily resulted from higher unit volumes,  while the decline
in net sales of low slope roofing  products  primarily  resulted from lower unit
volumes.

         Operating  income  for the first six  months of 2001 was $41.8  million
compared with $43.4 million reported in the same period of 2000. Lower operating
results were primarily  attributable to higher manufacturing costs,  principally
the cost of energy together with a decrease in low slope roofing  products sales
volumes,  and the sale of the security products business of LL Building Products
Inc.,  partially  offset by an increase in steep slope  roofing  products  sales
volumes.  Selling,  general and administrative  expenses were 20.2% of net sales
for the first  six  months  of 2001  compared  to 20.7% of net sales in the same
period of 2000,  primarily a result of the cost reduction programs instituted in
the third and fourth quarters of 2000.

         Interest  expense for the first six months  increased to $30.6  million
from $25.0 million recorded in the same period of 2000,  primarily due to higher
average  borrowings and lower capitalized  interest in 2001. Other expense,  net
was $3.5  million for the first six months of 2001  compared to $3.4 million for
the same period in 2000.

Liquidity and Financial Condition

         Net cash outflow during the first six months of 2001 was $73.2 million,
before financing  activities,  and included the use of $64.6 million of cash for
operations and the reinvestment of $7.3 million for capital programs.

         Cash  invested in  additional  working  capital  totaled  $94.0 million
during the first six months of 2001,  primarily reflecting seasonal increases in
inventories of $8.7 million and $93.7 million in accounts receivable,  including
a $88.2  million  increase  in the  receivable  from the trust  which  purchases
certain of the Company's trade accounts receivable,  partially offset by a $11.1
million increase in accounts payable and accrued liabilities.  The net cash used
for  operating  activities  also  included a $6.4  million  net  increase in the
payable to related parties/parent corporations.

         Net cash provided by financing  activities totaled $43.1 million during
the first six months of 2001,  mainly  reflecting $50.0 million in proceeds from
the sale of the Company's trade receivables, partially offset by $4.3 million in
repayments of long-term debt and  borrowings  under the Company's bank revolving
credit facilities.

         As a  result  of the  foregoing  factors,  cash  and  cash  equivalents
decreased by $28.8 million during the first six months of 2001 to $53.9 million.

         See  Note  3  to  Consolidated  Financial  Statements  for  information
regarding contingencies.

                                     * * *


                                       19




           Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                   CONDITION AND RESULTS OF OPERATIONS (continued)


Forward-looking Statements

     This   Quarterly   Report  on  Form  10-Q  contains  both   historical  and
forward-looking  statements.  All statements other than statements of historical
fact are, or may be deemed to be, forward-looking  statements within the meaning
of section 27A of the  Securities  Act of 1933 and section 21E of the Securities
Exchange Act of 1934. These forward-looking  statements are only predictions and
generally can be identified  by use of statements  that include  phrases such as
"believe," "expect," "anticipate," "intend," "plan," "foresee" or other words or
phrases. Similarly,  statements that describe the Company's objectives, plans or
goals also are forward-looking  statements. The Company's operations are subject
to certain  risks and  uncertainties  that could cause actual  results to differ
materially from those  contemplated by the relevant  forward-looking  statement.
The  forward-looking  statements included herein are made only as of the date of
this Quarterly  Report on Form 10-Q and the Company  undertakes no obligation to
publicly  update  forward-looking  statements  to reflect  subsequent  events or
circumstances.  No assurances can be given that projected results or events will
be achieved.

              Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES
                             ABOUT MARKET RISK

         Reference is made to Management's  Discussion and Analysis of Financial
Condition  and  Results  of  Operations  in the Form  10-K for a  discussion  of
"Market-Sensitive  Instruments  and Risk  Management."  There  were no  material
changes in such information as of July 1, 2001.









                                       20






                                    PART II

                               OTHER INFORMATION


Item 1. Legal Proceedings

         As of July 1, 2001, 1,853 alleged asbestos-related bodily injury claims
relating to the  inhalation  of  asbestos  fiber are  pending  against  Building
Materials  Corporation  of  America.  See  Note  3  to  Consolidated   Financial
Statements above.



Item 6. Exhibits and Reports on Form 8-K


(a)   Exhibits

                  None


(b)   No Reports on Form 8-K were filed during the quarter ended July 1, 2001.











                                       21





                                  SIGNATURES
                                  ----------



     Pursuant  to the  requirements  of  Section  13 or 15(d) of the  Securities
Exchange Act of 1934,  each  Registrant has duly caused this report to be signed
on its behalf by the undersigned thereunto duly authorized.


                          BUILDING MATERIALS CORPORATION OF AMERICA
                          BUILDING MATERIALS MANUFACTURING CORPORATION
                          GAF LEATHERBACK CORP.
                          WIND GAP REAL PROPERTY ACQUISITION CORP.
                          GAF MATERIALS CORPORATION (CANADA)


DATE:  August 15, 2001               BY: /s/John F. Rebele
       -----------------             ----------------------

                                     John F. Rebele
                                     Vice President
                                      and Chief Financial Officer
                                     (Principal Financial Officer)


DATE:  August 15, 2001               BY: /s/James T. Esposito
       -----------------             --------------------
                                     James T. Esposito
                                     Vice President and Controller
                                     (Principal Accounting Officer)














                                       22






                                  SIGNATURES
                                  ----------



     Pursuant  to the  requirements  of  Section  13 or 15(d) of the  Securities
Exchange Act of 1934,  each  Registrant has duly caused this report to be signed
on its behalf by the undersigned thereunto duly authorized.


                          BUILDING MATERIALS INVESTMENT CORPORATION
                          BMCA INSULATION PRODUCTS INC.
                          DUCTWORK MANUFACTURING CORPORATION
                          GAF PREMIUM PRODUCTS INC.
                          GAFTECH CORPORATION
                          LL BUILDING PRODUCTS INC.


DATE:  August 15, 2001               BY: /s/John F. Rebele
       -----------------             ----------------------

                                     John F. Rebele
                                     Vice President
                                      and Chief Financial Officer
                                     (Principal Financial and
                                      Accounting Officer)















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