Exhibit 99.1

       Unaudited Pro Forma Condensed Consolidated Statement of Operations
                        Twelve Months Ended April 3, 2004


The unaudited pro forma condensed consolidated statement of operations for the
twelve months ended April 3, 2004 is based on the historical financial
statements of Associated Materials Incorporated ("Associated Materials" or the
"Company") and the historical consolidated financial statements of Gentek
Holdings, Inc. ("Gentek Holdings") and on the assumptions and adjustments
described in the notes to the unaudited pro forma condensed consolidated
statement of operations. The pro forma adjustments are based upon available
information, preliminary estimates and certain assumptions that we believe are
reasonable, and are described in the accompanying notes.

On August 29, 2003, we acquired all of the issued and outstanding shares of
capital stock of Gentek Holdings, the parent company of Gentek Building
Products, Inc. and Gentek Building Products Limited, which we collectively refer
to as "Gentek". The unaudited pro forma condensed consolidated statement of
operations data has been prepared as if the acquisition of Gentek had occurred
as of the beginning of the twelve-month period. The pro forma statement should
not be considered indicative of actual results of operations that would have
been achieved had the acquisition of Gentek occurred at the beginning of the
twelve-month period and does not purport to indicate results of operations for
any future period.


                                      -4-

                        Associated Materials Incorporated
       Unaudited Pro Forma Condensed Consolidated Statement of Operations

                    For the Twelve Months Ended April 3, 2004
                                 (in thousands)





                                                 Historical
                                        ----------------------------
                                        Twelve Months   Five Months
                                            Ended          Ended           Gentek
                                           April 3,      August 29,       Holdings
                                             2004           2003         Acquisition
                                          Associated       Gentek         Pro Forma       Pro Forma
                                          Materials       Holdings       Adjustments       Combined
                                          ---------       --------       -----------       --------
                                                                             
Net sales ..........................     $   873,213    $   136,140    $      (782)(a)   $ 1,008,571
Cost of sales ......................         632,715        115,964           (782)(a)       740,894
                                                                            (7,003)(b)
                                         -----------    -----------    -----------       -----------
Gross profit .......................         240,498         20,176          7,003           267,677
Selling, general and administrative
     expense .......................         178,153         11,018          6,795(b)        195,966
                                         -----------    -----------    -----------       -----------
Income from operations .............          62,345          9,158            208            71,711
Interest expense, net ..............          27,943            883         (2,601)(c)        26,225
Foreign currency (gain) ............            (542)          (320)            --              (862)
Other ..............................              --            141             --               141
Merger transaction costs ...........              --          3,081             --             3,081
                                         -----------    -----------    -----------       -----------

Income from operations before income
   taxes ...........................          34,944          5,373          2,809            43,126
Income taxes .......................          14,492          2,840            565(d)         17,897
                                         -----------    -----------    -----------       -----------
Net income .........................     $    20,452    $     2,533    $     2,244       $    25,229
                                         ===========    ===========    ===========       ===========
EBITDA (e) .........................     $    81,391    $     8,581    $       208       $    90,180
Adjusted EBITDA (e) ................     $    97,291    $    14,654    $        --       $   111,945



                                      -5-

                        Associated Materials Incorporated
   Notes to Unaudited Pro Forma Condensed Consolidated Statement of Operations
                    For the Twelve Months Ended April 3, 2004
                             (Amounts in thousands)



(a)      Elimination of sales and cost of sales between the Company and Gentek
         Holdings for the five months ended August 29, 2003. Neither the Company
         nor Gentek Holdings had significant quantities of inventory on hand at
         the end of the period as a result of these transactions.

(b)      Details of the pro forma adjustments to cost of sales and selling,
         general and administrative expense to reflect the following: (i) the
         reclassification of supply center expenses and certain freight costs
         from cost of sales to selling, general and administrative expense to
         conform to the Company's presentation and (ii) elimination of the
         annual management services fee payable to Gentek Holdings' former
         parent company.


                                                         
Cost of sales:
     Reclassification of certain costs ................     $(7,003)
                                                            =======


Selling, general and administrative expenses:

     Reclassification of certain cost of sales expenses     $ 7,003
     Management services fee ..........................        (208)
                                                            -------
                                                            $ 6,795
                                                            =======


(c)      The pro forma adjustments to interest expense reflect the following:


                                                          
Commitment fee on revolving credit facility ............     $    244
Term loan ..............................................        7,437
Revolving portion of credit facility ...................          698
9-3/4% senior subordinated notes .......................       16,088
Amortization of deferred financing costs ...............        1,758
                                                             --------
Pro forma interest expense .............................       26,225
                                                             --------
Less: historical interest expense, net:
     Company ...........................................      (27,943)
     Gentek Holdings - Five Months Ended August 29,
        2003 ...........................................         (883)
                                                             --------
Total adjustment .......................................     $ (2,601)
                                                             ========


         Interest expense was calculated as follows: (i) commitment fee on
         unused portion of the revolving credit facility of 1/2%; (ii) a rate
         of 3.91% (average London Interbank Offered Rate ("LIBOR") for the
         twelve months ended March 31, 2004 of 1.16% + 2.75%) on the term loan
         portion of the credit facility arranged at the time of the acquisition
         of Gentek Holdings, (iii) a rate of 4.16% (average LIBOR for the twelve
         months ended March 31, 2004 of 1.16% + 3.00%) on the revolving loan
         portion of the credit facility arranged at the time of the acquisition
         of Gentek Holdings, (iv) an interest rate of 9-3/4% on the senior
         subordinated notes; and (v) twelve months of amortization of deferred
         financing costs.

         The effect of a 1/8% increase or decrease in interest rates would
         increase or decrease total pro forma interest expense by $0.3 million
         for the twelve months ended April 3, 2004.


                                      -6-

(d)      This amount represents the necessary adjustment to reflect a pro forma
         income tax provision of 41.5%.

(e)      EBITDA is calculated as net income plus interest, taxes, depreciation
         and amortization. Adjusted EBITDA excludes certain items. The Company
         considers Adjusted EBITDA to be an important indicator of its
         operational strength and performance of its business. The Company has
         included Adjusted EBITDA because it is a key financial measure used by
         management to (i) assess the Company's ability to service its debt and
         / or incur debt and meet the Company's capital expenditure
         requirements; (ii) internally measure the Company's operating
         performance; and (iii) determine the Company's incentive compensation
         programs. In addition, the Company's credit facility has certain
         covenants that use ratios utilizing this measure of Adjusted EBITDA.
         The definition of EBITDA under the indenture governing the 9-3/4% notes
         due 2012 also excludes certain items. Adjusted EBITDA has not been
         prepared in accordance with accounting principles generally accepted in
         the United States ("GAAP"). Adjusted EBITDA as presented by the Company
         may not be comparable to similarly titled measures reported by other
         companies. Such supplementary adjustments to EBITDA may not be in
         accordance with current SEC practices or the rules and regulations
         adopted by the SEC that apply to periodic reports filed under the
         Securities Exchange Act of 1934. Accordingly, the SEC may require that
         Adjusted EBITDA be presented differently in filings made with the SEC
         than as presented in this report, or not be presented at all. Adjusted
         EBITDA is not a measure determined in accordance with GAAP and should
         not be considered as an alternative to, or more meaningful than, net
         income (as determined in accordance with GAAP) as a measure of the
         Company's operating results or cash flows from operations (as
         determined in accordance with GAAP) or as a measure of the Company's
         liquidity. The reconciliation of net income to EBITDA and Adjusted
         EBITDA is as follows:




                                              Historical
                                      --------------------------
                                      Twelve Months  Five Months
                                          Ended        Ended        Gentek
                                         April 3,    August 29,    Holdings
                                           2004         2003      Acquisition
                                        Associated     Gentek      Pro Forma     Pro Forma
                                        Materials     Holdings    Adjustments    Combined
                                        ---------     --------    -----------    --------
                                                                     
Net income .........................     $ 20,452     $  2,533     $  2,244      $ 25,229
Interest ...........................       27,943          883       (2,601)       26,225
Taxes ..............................       14,492        2,840          565        17,897
Depreciation and amortization ......       18,504        2,325           --        20,829
                                         --------     --------     --------      --------
EBITDA .............................       81,391        8,581          208        90,180
Merger transaction costs (i) .......           --        3,081           --         3,081
Cost of sales adjustment (ii) ......        1,402           --           --         1,402
Certain warranty related costs (iii)           --        2,784           --         2,784
Management fees (iv) ...............           --          208         (208)           --
Management bonus (v) ...............       14,498           --           --        14,498
                                         --------     --------     --------      --------
Adjusted EBITDA ....................     $ 97,291     $ 14,654     $     --      $111,945
                                         ========     ========     ========      ========



(i)      Eliminates merger transaction costs, which includes $3.1 million of
         investment banking and legal fees incurred by Gentek Holdings in
         conjunction with the acquisition by the Company.

(ii)     Eliminates a cost of sales expense relating to an inventory fair value
         adjustment recorded at the time of the Gentek Holdings acquisition
         totaling $1.4 million.

(iii)    Eliminates certain warranty costs incurred by Gentek Holdings related
         to defects of specific colors of steel siding manufactured between
         1992 and 1995 for which the Company has recorded an actuarially
         determined reserve representing the fair value of the liability at
         the date of the acquisition and for which the Company received a
         reduction in the purchase price.

(iv)     Eliminates management services fee paid to Gentek Holdings' former
         parent company.

(v)      Eliminates the management bonus paid in recognition of management's
         efforts with respect to the successful acquisition of Gentek Holdings,
         the Company's performance since the April 2002 merger transaction, as
         well as the completion of AMH Holdings, Inc.'s (our indirect parent
         company) offering of senior discount notes.


                                      -7-