1 EXHIBIT 10.12a AMENDMENT NO. 1 TO CREDIT AGREEMENT AMENDMENT NO. 1 TO CREDIT AGREEMENT (the "AMENDMENT"), dated as of September 15, 1998, among American Architectural Products Corporation, a Delaware corporation, Eagle & Taylor Company, a Delaware corporation, Forte, Inc., an Ohio corporation, Western Insulated Glass, Co., an Arizona corporation, Thermetic Glass, Inc., a Delaware corporation, Binnings Building Products, Inc., a Delaware corporation, Danvid Window Company, a Delaware corporation, Modern Window Acquisition Corporation, a Delaware corporation, American Glassmith Acquisition Corporation, a Delaware corporation, VinylSource, Inc., a Delaware corporation, Weather-Seal Acquisition Corporation, a Delaware corporation, Eagle Window & Door Center, Inc., a Delaware corporation, Denver Window Acquisition Corporation, a Delaware corporation, AAPC One Acquisition Corporation, a Delaware corporation, and AAPC Two Acquisition Corporation, a Delaware corporation (the "BORROWERS"), the institutions from time to time parties hereto (the "LENDERS"), and BankBoston, N.A., in its capacity as contractual representative for itself and the other Lenders (the "AGENT") under that certain Credit Agreement dated as of June 9, 1998 by and among the Borrowers, the Lenders and the Agent (the "CREDIT AGREEMENT"). Defined terms used herein and not otherwise defined herein shall have the meaning given to them in the Credit Agreement. WHEREAS, the Borrowers, the Lenders and the Agent have entered into the Credit Agreement; and WHEREAS, the Borrowers, the Lenders and the Agent have agreed to amend the Credit Agreement on the terms and conditions set forth herein. NOW, THEREFORE, in consideration of the premises set forth above, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Borrowers, the Lenders and the Agent agree as follows: 1. AMENDMENT TO THE CREDIT AGREEMENT. Effective as of the date first above written and subject to the execution of this Amendment by the parties hereto and the satisfaction of the conditions precedent set forth in SECTION 2 below, the Credit Agreement shall be and hereby is amended as follows: The definition of "BORROWING BASE" in Section 1.1 is hereby amended to add at the end thereof immediately after the phrase "at the Boardman Aluminum Plant": ", (10) fifty percent (50%) of the raw materials component and fifty percent (50%) of the finished goods component of the Gross Amount of Eligible Inventory of 2 American Glassmith Acquisition Corporation and 0% of any other portion of the Inventory of American Glassmith Acquisition Corporation, (11) fifty percent (50%) of the raw materials component and fifty percent (50%) of the finished goods component of the Gross Amount of Eligible Inventory of Thermetic Glass, Inc. and 0% of any other portion of the Inventory of Thermetic Glass, Inc., and (12) sixty-two percent (62%) of the raw materials component consisting of aluminum, fifty percent (50%) of the raw materials component consisting of glass, and fifty percent (50%) of the finished goods component of the Gross Amount of Eligible Inventory of Western Insulated Glass, Co. and 0% of any other portion of the Inventory of Western Insulated Glass, Co." 2. CONDITIONS PRECEDENT. This Amendment shall become effective as of the date above written, if, and only if, the Agent has received duly executed originals of this Amendment from the Borrowers, the Lenders and the Agent. 3. REPRESENTATIONS AND WARRANTIES OF THE BORROWERS. The Borrowers hereby represent and warrant as follows: (a) This Amendment and the Credit Agreement, as amended hereby, constitute legal, valid and binding obligations of the Borrowers and are enforceable against the Borrowers in accordance with their terms. (b) Upon the effectiveness of this Amendment, the Borrowers hereby reaffirm all representations and warranties made in the Credit Agreement, and to the extent the same are not amended hereby, agree that all such representations and warranties shall be deemed to have been remade as of the date of delivery of this Amendment, unless and to the extent that any such representation and warranty is stated to relate solely to an earlier date, in which case such representation and warranty shall be true and correct as of such earlier date. 4. REFERENCE TO AND EFFECT ON THE CREDIT AGREEMENT. (a) Upon the effectiveness of Section 1 hereof, on and after the date hereof, each reference in the Credit Agreement to "this Credit Agreement," "hereunder," "hereof," "herein" or words of like import shall mean and be a reference to the Credit Agreement as amended hereby. (b) The Credit Agreement, as amended hereby, and all other documents, instruments and agreements executed and/or delivered in connection therewith, shall remain in full force and effect, and are hereby ratified and confirmed. (c) Except as expressly provided herein, the execution, delivery and effectiveness of this Amendment shall not operate as a waiver of any right, power or remedy of the Agent or the Lenders, nor constitute a waiver of any provision of the Credit Agreement or any other documents, instruments and agreements executed and/or delivered in connection therewith. 3 5. GOVERNING LAW. This Amendment shall be governed by and construed in accordance with the internal laws (as opposed to the conflict of law provisions) of the State of Illinois. 6. HEADINGS. Section headings in this Amendment are included herein for convenience of reference only and shall not constitute a part of this Amendment for any other purpose. 7. COUNTERPARTS. This Amendment may be executed by one or more of the parties to the Amendment on any number of separate counterparts and all of said counterparts taken together shall be deemed to constitute one and the same instrument. 4 IN WITNESS WHEREOF, this Amendment has been duly executed and delivered on the date first above written. AMERICAN ARCHITECTURAL BANKBOSTON, N.A. PRODUCTS CORPORATION By: /s/ W. J. Sherald ------------------------ EAGLE AND TAYLOR COMPANY Name: W. J. Sherald Title: Vice President FORTE, INC. WESTERN INSULATED GLASS, CO. THERMETIC GLASS, INC. BINNINGS BUILDING PRODUCTS, INC. DANVID WINDOW COMPANY MODERN WINDOW ACQUISITION CORPORATION AMERICAN GLASSMITH ACQUISITION CORPORATION VINYLSOURCE, INC. WEATHER-SEAL ACQUISITION CORPORATION EAGLE WINDOW & DOOR CENTER, INC. DENVER WINDOW ACQUISITION CORPORATION AAPC ONE ACQUISITION CORPORATION AAPC TWO ACQUISITION CORPORATION By: /s/ Richard L. Kovach --------------------------------------- (on behalf of the parties named above) Name: Richard L. Kovach Title: Chief Financial Officer