PLY GEM INDUSTRIES INC
SC 13D/A, 1997-08-01
MILLWOOD, VENEER, PLYWOOD, & STRUCTURAL WOOD MEMBERS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                 SCHEDULE 13D/A
                      UNDER THE SECURITIES EXCHANGE OF 1934



                            PLY GEM INDUSTRIES, INC.                            
- --------------------------------------------------------------------------------
                                (Name of Issuer)




                          Common Stock, $.25 par value                          
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)




                                    72941610                                    
- --------------------------------------------------------------------------------
                      (CUSIP Number of Class of Securities)



                             Lawrence D. Stuart, Jr.
                     Hicks, Muse, Tate & Furst Incorporated
                         200 Crescent Court, Suite 1600
                               Dallas, Texas 75201                              
- --------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                  Communications on Behalf of the Bidders)



                                    Copy to:
                               Michael D. Wortley
                             Vinson & Elkins L.L.P.
                            3700 Trammell Crow Center
                                2001 Ross Avenue
                              Dallas, Texas  75201                              
- --------------------------------------------------------------------------------



                                  July 29, 1997                                 
- --------------------------------------------------------------------------------
     (Date of Event which Requires Filing of this Statement on Schedule 13D


If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this schedule because of Rule
13d-1(b)(3) or (4), check the following box [ ].

Note:  Six copies of this statement, including all exhibits, should be filed
with the Commission. See Rule 13d-1(a) for other parties to whom copies are to
be sent.
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities,
and for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).

                               Page 1 of 39 Pages
<PAGE>   2
CUSIP NO. 72941610


- --------------------------------------------------------------------------------
  1   NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Atrium/PG Acquisition Corp.
- --------------------------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3   SEC USE ONLY

- --------------------------------------------------------------------------------
  4   SOURCE OF FUNDS*

       OO

- --------------------------------------------------------------------------------
  5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(e) or 2(f)                                                     [ ]

- --------------------------------------------------------------------------------
  6   CITIZENSHIP OR PLACE OF ORGANIZATION

      State of Delaware
- --------------------------------------------------------------------------------
  7   SOLE VOTING POWER


- --------------------------------------------------------------------------------
  8   SHARED VOTING POWER


- --------------------------------------------------------------------------------
  9   SOLE DISPOSITIVE POWER


- --------------------------------------------------------------------------------
 10   SHARED DISPOSITIVE POWER

      6,234,603* shares
- --------------------------------------------------------------------------------
 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,234,603* shares
- --------------------------------------------------------------------------------
 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]

- --------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      32.8%
- --------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*

      CO
- --------------------------------------------------------------------------------


* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.





                                       2
<PAGE>   3
CUSIP NO. 72941610



- --------------------------------------------------------------------------------
  1   NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Atrium Acquisition Holdings Corp.
- --------------------------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3   SEC USE ONLY

- --------------------------------------------------------------------------------
  4   SOURCE OF FUNDS*

      OO
- --------------------------------------------------------------------------------
  5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(e) or 2(f)                                                     [ ]

- --------------------------------------------------------------------------------
  6   CITIZENSHIP OR PLACE OF ORGANIZATION

      State of Delaware
- --------------------------------------------------------------------------------
  7   SOLE VOTING POWER

- --------------------------------------------------------------------------------
  8   SHARED VOTING POWER


- --------------------------------------------------------------------------------
  9   SOLE DISPOSITIVE POWER


- --------------------------------------------------------------------------------
 10   SHARED DISPOSITIVE POWER

      6,234,603* shares
- --------------------------------------------------------------------------------
 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,234,603* shares
- --------------------------------------------------------------------------------
 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]

- --------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      32.8%
- --------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*

      CO, HC
- --------------------------------------------------------------------------------


* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.





                                       3
<PAGE>   4
CUSIP NO. 72941610



- --------------------------------------------------------------------------------
  1   NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Atrium Corporation
- --------------------------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3   SEC USE ONLY

- --------------------------------------------------------------------------------
  4   SOURCE OF FUNDS*

      OO
- --------------------------------------------------------------------------------
  5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(e) or 2(f)                                                     [ ]

- --------------------------------------------------------------------------------
  6   CITIZENSHIP OR PLACE OF ORGANIZATION

      State of Delaware
- --------------------------------------------------------------------------------
  7   SOLE VOTING POWER


- --------------------------------------------------------------------------------
  8   SHARED VOTING POWER


- --------------------------------------------------------------------------------
  9   SOLE DISPOSITIVE POWER


- --------------------------------------------------------------------------------
 10   SHARED DISPOSITIVE POWER

      6,234,603* shares
- --------------------------------------------------------------------------------
 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,234,603* shares
- --------------------------------------------------------------------------------
 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]

- --------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      32.8%
- --------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*

      CO, HC
- --------------------------------------------------------------------------------


* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.





                                       4
<PAGE>   5
CUSIP NO. 72941610



- --------------------------------------------------------------------------------
  1   NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      HM3 Coinvestors, L.P.
- --------------------------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3   SEC USE ONLY

- --------------------------------------------------------------------------------
  4   SOURCE OF FUNDS*

      OO
- --------------------------------------------------------------------------------
  5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(e) or 2(f)                                                     [ ]

- --------------------------------------------------------------------------------
  6   CITIZENSHIP OR PLACE OF ORGANIZATION

      State of Texas
- --------------------------------------------------------------------------------
  7   SOLE VOTING POWER


- --------------------------------------------------------------------------------
  8   SHARED VOTING POWER


- --------------------------------------------------------------------------------
  9   SOLE DISPOSITIVE POWER


- --------------------------------------------------------------------------------
 10   SHARED DISPOSITIVE POWER

      6,234,603* shares
- --------------------------------------------------------------------------------
 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,234,603* shares
- --------------------------------------------------------------------------------
 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]

- --------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      32.8%
- --------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*

      PN
- --------------------------------------------------------------------------------



* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.





                                       5
<PAGE>   6
CUSIP NO. 72941610



- --------------------------------------------------------------------------------
  1   NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Hicks, Muse, Tate & Furst Equity Fund III, L.P.
- --------------------------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3   SEC USE ONLY

- --------------------------------------------------------------------------------
  4   SOURCE OF FUNDS*

      OO
- --------------------------------------------------------------------------------
  5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(e) or 2(f)                                                     [ ]

- --------------------------------------------------------------------------------
  6   CITIZENSHIP OR PLACE OF ORGANIZATION

      State of Delaware
- --------------------------------------------------------------------------------
  7   SOLE VOTING POWER


- --------------------------------------------------------------------------------
  8   SHARED VOTING POWER


- --------------------------------------------------------------------------------
  9   SOLE DISPOSITIVE POWER


- --------------------------------------------------------------------------------
 10   SHARED DISPOSITIVE POWER

      6,234,603* shares
- --------------------------------------------------------------------------------
 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,234,603* shares
- --------------------------------------------------------------------------------
 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]

- --------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      32.8%
- --------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*

      PN
- --------------------------------------------------------------------------------



* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.





                                       6
<PAGE>   7
CUSIP NO. 72941610


- --------------------------------------------------------------------------------
  1   NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      HM3/GP Partners, L.P..
- --------------------------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3   SEC USE ONLY

- --------------------------------------------------------------------------------
  4   SOURCE OF FUNDS*

      OO
- --------------------------------------------------------------------------------
  5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(e) or 2(f)                                                     [ ]

- --------------------------------------------------------------------------------
  6   CITIZENSHIP OR PLACE OF ORGANIZATION

      State of Texas
- --------------------------------------------------------------------------------
  7   SOLE VOTING POWER


- --------------------------------------------------------------------------------
  8   SHARED VOTING POWER


- --------------------------------------------------------------------------------
  9   SOLE DISPOSITIVE POWER


- --------------------------------------------------------------------------------
 10   SHARED DISPOSITIVE POWER

      6,234,603* shares
- --------------------------------------------------------------------------------
 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,234,603* shares
- --------------------------------------------------------------------------------
 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]

- --------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      32.8%
- --------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*

      PN
- --------------------------------------------------------------------------------



* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.





                                       7
<PAGE>   8
CUSIP NO. 72941610


- --------------------------------------------------------------------------------
  1   NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Hicks, Muse GP Partners III, L.P.
- --------------------------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3   SEC USE ONLY


- --------------------------------------------------------------------------------
  4   SOURCE OF FUNDS*

      OO
- --------------------------------------------------------------------------------
  5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(e) or 2(f)                                                     [ ]

- --------------------------------------------------------------------------------
  6   CITIZENSHIP OR PLACE OF ORGANIZATION

      State of Texas
- --------------------------------------------------------------------------------
  7   SOLE VOTING POWER


- --------------------------------------------------------------------------------
  8   SHARED VOTING POWER


- --------------------------------------------------------------------------------
  9   SOLE DISPOSITIVE POWER


- --------------------------------------------------------------------------------
 10   SHARED DISPOSITIVE POWER

      6,234,603* shares
- --------------------------------------------------------------------------------
 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,234,603* shares
- --------------------------------------------------------------------------------
 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]


- --------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      32.8%
- --------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*

      PN
- --------------------------------------------------------------------------------



* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.


                                      8
<PAGE>   9


- --------------------------------------------------------------------------------
  1  NAME OF REPORTING PERSON
                             
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
     
     Hicks, Muse Fund III Incorporated
- --------------------------------------------------------------------------------
  2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                     
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3  SEC USE ONLY
                 
     
- --------------------------------------------------------------------------------
  4  SOURCE OF FUNDS*
                     
     OO
- --------------------------------------------------------------------------------
  5  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
     ITEMS 2(e) or 2(f)                                                   [ ]
     
- --------------------------------------------------------------------------------
  6  CITIZENSHIP OR PLACE OF ORGANIZATION
                                         
     State of Texas
- --------------------------------------------------------------------------------
  7  SOLE VOTING POWER
                      
     
- --------------------------------------------------------------------------------
  8  SHARED VOTING POWER
                        
     
- --------------------------------------------------------------------------------
  9  SOLE DISPOSITIVE POWER
                           
     
- --------------------------------------------------------------------------------
 10  SHARED DISPOSITIVE POWER
                             
     6,234,603* shares
- --------------------------------------------------------------------------------
 11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                 
     6,234,603* shares
- --------------------------------------------------------------------------------
 12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]
     

- --------------------------------------------------------------------------------
 13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                                                              
     32.8%
- --------------------------------------------------------------------------------
 14  TYPE OF REPORTING PERSON*
                                     
     CO
- --------------------------------------------------------------------------------



* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.





                                       9
<PAGE>   10
CUSIP NO. 72941610


- --------------------------------------------------------------------------------
  1   NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Thomas O. Hicks
- --------------------------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [ ]
                                                                         (b) [ ]
- --------------------------------------------------------------------------------
  3   SEC USE ONLY


- --------------------------------------------------------------------------------
  4   SOURCE OF FUNDS*

      OO
- --------------------------------------------------------------------------------
  5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(e) or 2(f)                                                     [ ]

- --------------------------------------------------------------------------------
  6   CITIZENSHIP OR PLACE OF ORGANIZATION

      United States of America
- --------------------------------------------------------------------------------
  7   SOLE VOTING POWER


- --------------------------------------------------------------------------------
  8   SHARED VOTING POWER


- --------------------------------------------------------------------------------
  9   SOLE DISPOSITIVE POWER


- --------------------------------------------------------------------------------
 10   SHARED DISPOSITIVE POWER

      6,234,603* shares
- --------------------------------------------------------------------------------
 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,234,603* shares
- --------------------------------------------------------------------------------
 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ]


- --------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      32.8%
- --------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*

      IN
- --------------------------------------------------------------------------------



* On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware corporation
("Parent"), and Atrium/PG Acquisition Corp., a Delaware corporation and a
direct wholly-owned subsidiary of Parent ("Sub "), entered into the First
Amended and Restated  Stockholders Agreement (the "Stockholders Agreement")
with Ply Gem Industries, Inc., a Delaware corporation (the "Company") Nortek,
Inc., a Delaware Corporation, NTK Sub, Inc., a Delaware Corporation and Jeffrey
S.  Silverman, Dana R. Snyder and Herbert P. Dooskin (the "Stockholders").
Pursuant to the Stockholders Agreement, the Stockholders granted Sub an option
to purchase the 1,235,261 shares of Company's common stock, par value $.25 per
share (the "Common Stock") currently owned by the Stockholders plus an option
to purchase 4,999,342 shares of Common Stock which may be acquired upon
exercise of options currently held by the Stockholders (the "Shares"). The
above discussion of the Stockholders Agreement is qualified in its entirety by
reference to the Stockholders Agreement which is filed as an exhibit to this
Amended Schedule 13D.





                                      10
<PAGE>   11
                                 SCHEDULE  13D



ITEM 3.       SOURCES AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

       If the shares subject to the Stockholders Agreement (as hereinafter
defined) are sold to Nortek, any necessary funding will be provided by Nortek.
If Sub (as hereinafter defined) exercises its option, Sub will have to arrange
for financing. Sub has not currently made any such financing arrangements.

       The Common Stock to which this Amended Schedule 13D relates was acquired
pursuant to the Stockholders Agreement (as hereinafter defined) which is more
fully described in response to Item 6 and filed as an exhibit hereto. The
Stockholders Agreement is incorporated herein by reference.


ITEM 4.       PURPOSE OF THE TRANSACTION.

       The purpose of the acquisition of the Common Stock pursuant to the
Stockholders Agreement is to resell such shares to an unaffiliated third party
if the Option is exercised.

ITEM 5.       INTEREST IN SECURITIES OF ISSUER

       (a)    As of the close of business on July 29, 1997, the each of the
Reporting Persons may each be deemed to have beneficially owned 6,234,603
shares or 32.8 percent of the Common Stock by virtue of the terms of the
Stockholders Agreement.

       (b)    As of July 29, 1997, each of the Reporting Persons does not have
shared power to vote or to direct the vote of any shares of the Company common
stock, per value $.25 per share (the "COMMON STOCK"). On July 29, 1997, each of
the Reporting Persons may be deemed to have shared power to dispose of or to
direct the disposition of 6,234,603 shares of the Common Stock.

       (c)    Until such time as Parent's option is exercised, each of the
Stockholders  (as hereinafter defined) will have the right to receive and the
power to direct the receipt of any dividends on the Common Stock. Upon exercise
of Parent's option under the Stockholders Agreement, the Stockholders will
receive the proceeds from the sale of the such shares of Common Stock.

ITEM 6.       CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH
              RESPECT TO THE SUBJECT COMPANY'S SECURITIES.

       On July 29, 1997, Atrium Acquisition Holdings Corp., a Delaware
Corporation ("PARENT") Atrium/PG Acquisition Corp., a Delaware corporation and
wholly owned subsidiary of Parent ("SUB") entered into the First Amended
Restated Stockholders Agreement dated July 24, 1997 (the "STOCKHOLDERS
AGREEMENT") with the Ply Gem Industries, Inc., a Delaware corporation (the
"COMPANY"), Nortek, Inc., a Delaware corporation ("NORTEK") and NTK Sub, Inc.,
a Delaware corporation and a wholly owned Subsidiary of Nortek  ("NTK")  and
Jeffrey S. Silverman, Dana R. Snyder and Herbert P. Dooskin (the
"STOCKHOLDERS"). Pursuant to the terms of the Stockholders Agreement, each of
the Stockholders will grant Sub a Purchase Option (as hereafter defined) and
agrees to tender such shares in the offer as hereinafter defined.





                                       11
<PAGE>   12

       OPTIONS.

              (a)    Each of the Stockholders grants to Sub an irrevocable
option (each, a "Purchase Option" and collectively, the "Purchase Options") to
purchase the number of shares set forth opposite such Stockholder's name on
Schedule I to the Stockholders Agreement ("Schedule I") hereto together with
all of the shares (including any additional shares that may be issuable as a
result of a "change of control") beneficially owned as determined pursuant to
Rule 13d-3 of the Securities Exchange Act of 1934 by such Stockholder as a
result of the Stockholder's exercise of the options set forth opposite such
Stockholder's name on Schedule II to the Stockholders Agreement ("Schedule II")
(collectively, with the Shares described on Schedule I, the "Option Shares") at
a purchase price per share equal $18.75 (the "PURCHASE PRICE").  Subject to the
last sentence of this paragraph, each Purchase Option is currently exercisable
in whole but not in part, and shall remain exercisable in whole but not in part
until 5:00 p.m. (Dallas, Texas time) on the date which is 120 days after a
Termination Event (the "OPTION PERIOD"), so long as: (i) all waiting periods
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the
"HSR Act"), required for the purchase by Sub of the Option Shares upon such
exercise shall have expired or been waived, and (ii) there shall not be in
effect any preliminary or final injunction or other order issued by any court
or governmental, administrative or regulatory agency or authority prohibiting
the exercise of the Purchase Options pursuant to the Stockholders Agreement.
Termination Event shall mean the first to occur of (i) the termination of the
Nortek Agreement by any party thereto, (ii) the termination, withdrawal,
abandonment or expiration of the Offer without the Shares of each Stockholder
as set forth on Schedule I  being accepted for purchase thereunder
(collectively an "Offer Termination Event") or (iii) the material breach on the
part of any party of any of their respective obligations. The Option Period
shall be extended for the time period that any such preliminary injunction or
order shall be in effect that otherwise prohibits the exercise of a Purchase
Option. To exercise the Purchase Options, Sub shall send a written notice (the
"Notice") to the Stockholders identifying the place and date (not less than one
nor more than 20 business days from the date of the Notice) for the closing of
such purchase. The Sub shall not exercise the Purchase Options prior to the
occurrence of a Termination Event.

              (b)    Upon receipt of the Notice to the extent not previously
exercised, contemporaneously with the closing of the purchase of the Option
Shares, each Stockholder shall exercise in full the Options set forth opposite
such Stockholder's name on Schedule II. For convenience purposes, in connection
with such exercise of the Options, each Stockholder hereby gives the Company
irrevocable notice of the exercise of his Options effective contemporaneously
with the closing of the purchase of the Option Shares pursuant to the Purchase
Option and the Company hereby acknowledges the effectiveness of such exercise.
Each Stockholder also hereby irrevocably instructs the Company to issue (and
the Company hereby agrees to issue) the shares issuable upon such exercise in
the name of Sub or its permitted assignee (and Sub or its permitted assignee
shall be deemed the record owner thereof as of the date of such exercise so
long as Sub or its permitted assignee timely tenders payment of the Purchase
Price as provided herein) and Sub hereby agrees, on behalf of each Stockholder,
to pay directly to the Company (by means of wire transfer or official bank
check) such amount as may be necessary to fund the payment of the exercise
price (without regard to any applicable withholding taxes) due and payable to
the Company as a result of such exercise (with the aggregate amount of the
Purchase Price due and payable to each Stockholder (or his designee) being
reduced by the amount of any such payment made by Sub on behalf of such
Stockholder and with the remaining amount of the Purchase Price otherwise due
and payable to each Stockholder being paid directly to such Stockholder, as may
be requested by the Company net of any applicable withholding taxes required to
be paid to the Company, by means of wire transfer or official bank check). Such
payments to the Company (including such requested withholding taxes) and the
Stockholders shall be made contemporaneously with the exercise of the Purchase
Options and the delivery of the Option Shares





                                       12
<PAGE>   13
thereunder, provided, that as to any Stockholder subject to Section 16(a) of
the Exchange Act, payment to such Stockholder of any portion of the Purchase
Price will be deferred (if necessary to avoid Section 16(b) liability) until
the first date such payment can be made without liability to such Stockholder
under Section 16(b) of the Exchange Act, but shall be paid as soon as
practicable thereafter.

              (c)    In the event that Sub has purchased the Option Shares
pursuant to the Purchase Options, and, within one year after the date of such
purchase, the Sub or any affiliate thereof sells, transfers, exchanges or
disposes of any of the Option Shares in a transaction with a non-affiliate of
Sub (a "Disposition") then, within two business days after the closing of such
Disposition, Sub shall tender and pay to each Stockholder, in immediately
available funds, their respective pro-rata share (calculated based on the
respective amount of the Option Shares purchased from each Stockholder pursuant
to the Purchase Options) of 25% of the Net Profit realized by Sub in connection
with such Disposition. As used in this paragraph, Net Profit shall mean an
amount equal to (i) the excess, if any, of the gross amount realized by Sub
from a Disposition over (ii) the aggregate Purchase Price paid with respect to
the Option Shares subject to such Disposition, with such excess being reduced
by the sum of (A) all reasonable out-of-pocket fees, costs and expenses
incurred by Sub and its affiliates in connection with such Disposition
(including, without limitation, all fees, costs and expenses of counsel) which
in no event shall exceed 1% of such Net Profit, and (B) all customary brokerage
fees and commissions, if any, incurred in connection with such Disposition.

              (d)    In the event that within the Option Period a Stockholder
sells, transfers, exchanges, cancels or disposes of any of his Option Shares or
options in connection with or as a result of an Acquisition Proposal (an
"Alternative Disposition") other than pursuant to the offer then, within two
business days after the closing of such Alternative Disposition, such
Stockholder shall tender and pay to Sub, in immediately available funds, its
pro-rata share of 75% of the Net Profit realized by such Stockholder in
connection with such Alternative Disposition. As used in this Paragraph, Net
Profit shall mean (i) in the case of outstanding Option Shares, an amount equal
to the excess, if any, of (A) the gross amount realized by such Stockholder
from an Alternative Disposition of outstanding Option Shares, over (B) the
product of  (x) the number of such Option Shares subject to such Alternative
Disposition, multiplied by (y) the Purchase Price and (ii) in the case of
options, an amount equal to the excess, if any, of (A) the product of (x) the
gross underlying per Share price otherwise paid in the Alternative Disposition
and used in calculating the amount so realized by such Stockholder with respect
to such options in connection with such Alternative Disposition, multiplied by
(y) the number of Option Shares subject to such options, over (B) the product
of (x) the number of Option Shares subject to such options, multiplied by (y)
the Purchase Price, with the aggregate of such excesses being reduced by the
sum of (1) all reasonable out-of-pocket fees, costs and expenses incurred by
such Stockholder in connection with such Alternative Disposition, (including,
without limitation, all fees, costs and expenses of counsel, but excluding any
withholding taxes) which in no event shall exceed 1% of such Net Profit, and
(2) all customary brokerage fees and commissions, if any, incurred in
connection with such Alternative Disposition.

              (e)    As may be requested by Sub subsequent to a Termination
Event but prior to the expiration of the Option Period each Stockholder shall
tender his Shares as set forth on Schedule I hereto pursuant to any tender
offer being made (at a per Share price greater than the Purchase Price) in
connection with an Acquisition Proposal.

              (f)    The Purchase Options shall terminate in full upon the
consummation of the transactions (including, the tendering of all payments to
be made thereunder) contemplated by offer.





                                       13
<PAGE>   14
       THE NORTEK OFFER

       (a)    Each Stockholder, severally and not jointly and severally, agrees
to validly tender (and not to withdraw) pursuant to and in accordance with the
terms of the tender offered by Nortek (the "OFFER"), not later than one
business day prior to the expiration date of the Offer pursuant to the
Agreement and Plan of Merger (as such agreement may hereafter be amended,
restated or renewed from time to time, the ("Nortek Agreement") and Rule 14d-2
under the Exchange Act, the number of Shares. Each party to the Stockholders
Agreement acknowledges and agrees that NTK's obligation to accept for payment
shares purchased pursuant to the Offer, including the shares tendered pursuant
to the Stockholders Agreement, is subject to the terms and conditions of the
Offer. The obligations of the Stockholders to tender the share shall terminate
upon a Termination Event

       FINANCIAL ADVISORY AGREEMENT

       Pursuant to a Financial Advisory Agreement dated November 27, 1996 an
affiliate of Fund III may receive an advisory fee of 1.5% of the "transaction
value."  The term "TRANSACTION VALUE" means the total value of the transaction,
including without limitation, the aggregate amount of the funds required to
complete the transaction (excluding any fees payable pursuant to the Financial
Advisory Agreement), including the amount of any indebtedness, preferred stock
or similar items assumed (or remaining outstanding).


ITEM 7.       MATERIAL TO BE FILED AS EXHIBITS.

99(1)  Stockholders Agreement attached thereto as an Exhibit.

99(2)  Financial Advisory Agreement dated as of November 27, 1996 among Atrium
       , ACI and Hicks, Muse & Co. Partners, L.P.





                                       14
<PAGE>   15
       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997


                                   ATRIUM/PG ACQUISITION CORP.


                                   By:/s/ Jeffry S. Fronterhouse                
                                      ------------------------------------------
                                   Name: Jeffry S. Fronterhouse                 
                                        ----------------------------------------
                                   Title:Executive Vice President and Secretary 
                                         ---------------------------------------

       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997



                                   ATRIUM ACQUISITION HOLDINGS
                                   CORP.


                                   By: /s/ Jeffry S. Fronterhouse               
                                      ------------------------------------------
                                   Name: Jeffry S. Fronterhouse                 
                                        ----------------------------------------
                                   Title:Executive Vice President and Secretary 
                                         ---------------------------------------


       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997



                                   ATRIUM CORPORATION


                                   By: /s/ Jeffry S. Fronterhouse               
                                      ------------------------------------------
                                   Name: Jeffry S. Fronterhouse                 
                                        ----------------------------------------
                                   Title: Executive Vice President              
                                         ---------------------------------------

<PAGE>   16
       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997


                                   HM3 COINVESTORS, L.P.

                                   By:     Hicks, Muse GP Partners III, L.P.,
                                           Its General Partner

                                   By:     Hicks, Muse Fund III Incorporated,
                                           Its General Partner


                                   By: /s/ Jeffry S. Fronterhouse
                                      ---------------------------
                                   Name: Jeffry S. Fronterhouse                 
                                        ----------------------------------------
                                   Title: Vice President                        
                                         ---------------------------------------


       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997


                                   HICKS, MUSE, TATE & FURST EQUITY
                                   FUND III, L.P.

                                   By:     HM3/GP Partners, L.P.,
                                           Its General Partner

                                   By:     Hicks, Muse GP Partners III, L.P.,
                                           Its General Partner

                                   By:     Hicks, Muse Fund III Incorporated,
                                           Its General Partner


                                   By: /s/ Jeffry S. Fronterhouse               
                                      ------------------------------------------
                                   Name: Jeffry S. Fronterhouse                 
                                        ----------------------------------------
                                   Title: Vice President                        
                                         ---------------------------------------

<PAGE>   17
       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997


                                   HM3/GP PARTNERS, L.P.

                                   By:     Hicks, Muse GP Partners III, L.P.,
                                           Its General Partner

                                   By:     Hicks, Muse Fund III Incorporated,
                                           Its General Partner


                                   By: /s/ Jeffry S. Fronterhouse               
                                      ------------------------------------------
                                   Name: Jeffry S. Fronterhouse                 
                                        ----------------------------------------
                                   Title: Vice President                        
                                         ---------------------------------------



       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997


                                   HICKS, MUSE GP PARTNERS III, L.P.

                                   By:     Hicks, Muse Fund III Incorporated,
                                           Its General Partner


                                   By: /s/ Jeffry S. Fronterhouse               
                                      ------------------------------------------
                                   Name: Jeffry S. Fronterhouse                 
                                        ----------------------------------------
                                   Title: Vice President                        
                                         ---------------------------------------

<PAGE>   18
       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997



                                   HICKS, MUSE FUND III INCORPORATED


                                   By: /s/ Jeffry S. Fronterhouse               
                                      ------------------------------------------
                                   Name: Jeffry S. Fronterhouse                 
                                        ----------------------------------------
                                   Title: Vice President                        
                                         ---------------------------------------


       After due inquiry and to the best of my knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  August 1, 1997



                                   /s/ Thomas O. Hicks                          
                                   ---------------------------------------------
                                   Thomas O. Hicks

<PAGE>   19
                              INDEX TO EXHIBITS

EXHIBIT
NUMBER           DESCRIPTION
- -------          -----------

99(1)       Stockholders Agreement attached thereto as an Exhibit.

99(2)       Financial Advisory Agreement dated as of November 27, 1996 among 
            Atrium, ACI and Hicks, Muse & Co. Partners, L.P.





<PAGE>   1
                                                                    EXHIBIT 99.1


                           FIRST AMENDED AND RESTATED
                             STOCKHOLDERS AGREEMENT


       THIS FIRST AMENDED AND RESTATED STOCKHOLDERS AGREEMENT, dated as of July
24, 1997 (the "Agreement"), is made and entered into by Atrium Acquisition
Holdings Corp., a Delaware corporation ("Parent"), Atrium/PG Acquisition Corp.,
a Delaware corporation and a wholly-owned subsidiary of Parent ("Sub"), Jeffrey
S. Silverman, Dana R. Snyder and Herbert P. Dooskin (collectively, the
"Stockholders" and individually a "Stockholder"), Ply Gem Industries, Inc., a
Delaware corporation (the "Company"), Nortek, Inc., a Delaware corporation
("Nortek") and NTK Sub, Inc., a Delaware corporation and a wholly-owned
subsidiary of Nortek ("NTK").

                                  WITNESSETH:

       WHEREAS, prior to the date hereof Parent, Sub, the Company and, for
limited purposes, Atrium Corporation, entered into that certain Agreement and
Plan of Merger dated as of June 24, 1997 (the "Merger Agreement");

       WHEREAS, on July 24, 1997 the Merger Agreement was terminated in
accordance with its terms;

       WHEREAS, on July 24, 1997 Nortek, NTK and the Company entered into an
Agreement and Plan of Merger (as such agreement may hereafter be amended,
restated or renewed from time to time, the "Nortek Agreement"), pursuant to
which NTK will commence a tender offer for Shares (as defined below) of the
Company and NTK will be merged with and into the Company;

       WHEREAS, as a result of the termination of the Merger Agreement and
Nortek, NTK and the Company entering into the Nortek Agreement, the parties
desire to amend and restate that certain Stockholders Agreement between certain
of the parties hereto dated as of June 24, 1997 in accordance with the terms
and provisions of this Agreement;

       NOW, THEREFORE, in consideration of the foregoing and the
representations, warranties, covenants and agreements contained herein, the
parties hereto, intending to be legally bound, hereby agree as follows:

       1.     DEFINITIONS. For purposes of this Agreement:

              (a)    "Acquisition Proposal" shall mean any proposal or offer
(other than the transactions among the Company, Parent and Sub previously
contemplated in the Merger Agreement) involving the Company or any of its
subsidiaries for, or an inquiry or indication of interest that reasonably could
be expected to lead to: (i) any merger, consolidation, share exchange,
recapitalization, business combination, or other similar transaction, (ii) any
sale, lease, exchange, mortgage, pledge, transfer or other disposition of a
material portion of the assets of the Company and its subsidiaries, taken as a
whole, in a single transaction or series of transactions, or (iii) any tender
<PAGE>   2
offer or exchange offer for all or any portion of the outstanding shares of
capital stock of the Company or any of its subsidiaries or the filing of a
registration statement under the Securities Act of 1933 in connection
therewith. The term "Acquisition Proposal" shall include the Offer and the
Merger.

              (b)    "Beneficially Own" or "Beneficial Ownership" with respect
to any securities shall mean having "beneficial ownership" of such securities
(as determined pursuant to Rule 13d-3 under the Securities Exchange Act of
1934, as amended (the "Exchange Act")), including pursuant to any agreement,
arrangement or understanding, whether or not in writing. Without duplicative
counting of the same securities by the same holder, securities Beneficially
Owned by a Person shall include securities Beneficially Owned by all other
Persons with whom such Person would constitute a "group" within the meanings of
Section 13(d)(3) of the Exchange Act.

              (c)    "Merger shall mean the merger contemplated by the Nortek
Agreement.

              (d)    "Offer" shall mean the cash tender offer contemplated by
the Nortek Agreement for all of the outstanding Shares.

              (e)    "Offer Price" shall mean the greater of $19.50 or the
highest per share price paid in the Offer.

              (f)    "Options" shall mean all outstanding options or warrants
(including stock purchase rights and stock awards) to purchase or acquire
Shares and shall include the right under the Options to acquire additional
Shares upon a "change of control" with respect to the Company.

              (g)    "Person" shall mean an individual, corporation,
partnership, joint venture, association, trust, unincorporated organization or
other entity.

              (h)    "Purchase Price" shall mean a per share purchase price
equal to $18.75.

              (i)    "Shares" shall mean shares of common stock, par value
$0.25 per share, of the Company. The term "Shares" shall include, without
limitation, shares of Unvested Stock and any restricted Shares.

              (j)    "Termination Event " shall mean the first to occur of (i)
the termination of the Nortek Agreement by any party thereto, (ii) the
termination, withdrawal, abandonment or expiration of the Offer without the
Shares of each Stockholder as set forth on Schedule I hereto being accepted for
purchase thereunder (collectively an "Offer Termination Event") or (iii) the
material breach on the part of any party of any of their respective obligations
under Section 2.



                                      2
<PAGE>   3
       In addition to the terms otherwise defined herein, the following terms
shall have the meaning set forth in Nortek Agreement:

              "Company Stockholder Approval";
              "Offer Documents";
              "Proxy Statement";
              "SEC"; and
              "Unvested Stock".

       2.     THE NORTEK OFFER

              (a)    Each Stockholder hereby, severally and not jointly and
severally, agrees to validly tender (and not to withdraw) pursuant to and in
accordance with the terms of the Offer, not later than one business day prior
to the expiration date of the Offer pursuant to the Nortek Agreement and Rule
14d-2 under the Exchange Act, the number of Shares set forth opposite such
Stockholder's name on Schedule I hereto. Each party hereto acknowledges and
agrees that NTK's obligation to accept for payment Shares purchased pursuant to
the Offer, including the Shares tendered pursuant to the Agreement by the
Stockholders, is subject to the terms and conditions of the Offer. The
obligations of the Stockholders under this Section 2(a) shall terminate upon a
Termination Event (except a Termination Event resulting from a breach by a
Stockholder).

              (b)    Each Stockholder hereby agrees to permit Nortek and NTK to
publish and disclose in the Offer Documents and, if Company Stockholder
Approval is required under applicable law, the Proxy Statement (including all
documents and schedules filed with the SEC) such Stockholder's identity and
ownership of Shares and the nature of such Stockholder's commitments,
arrangements and understandings under this Agreement.

              (c)    Immediately after the acceptance of any Shares for payment
pursuant to the Offer, Nortek and NTK shall take such actions as may be
necessary (including, without limitation, the giving to the "Depositary " such
instructions as may be necessary) to cause payment of the aggregate Offer Price
due in respect of the Shares properly tendered hereunder by each Stockholder to
be paid, no later than on the first business day following the date that any
Shares have been accepted for purchase pursuant to the Offer (the "Purchase
Date"), as follows:

                     (i)    The Sub, or its permitted assign, in respect of the
       Shares that have been so tendered by each Stockholder and not withdrawn,
       shall receive an amount equal to 75% of the excess of (A) the aggregate
       Offer Price payable in respect of such Stockholder's Shares so tendered
       over (B) the product of (1) the number of Shares so tendered, multiplied
       by (2) the Purchase Price; and

                     (ii)   Each Stockholder (or his designee), in respect of
       the Shares that have been so tendered by such Stockholder, shall receive
       the amount of the aggregate Offer Price payable in respect of the Shares
       so tendered after deducting therefrom the amount payable pursuant to
       clause (i) above.





                                       3
<PAGE>   4
              (d)    On the Purchase Date, the Company, Nortek, NTK and each of
the Stockholders, severally and not jointly and severally, shall take such
actions as may be necessary for each of the Options set forth next to each
Stockholder's name on Schedule II hereto to be cancelled in consideration of an
amount in cash (subject to any applicable withholding tax), in respect of each
of the Shares subject to each of such Options (including any additional Shares
subject thereto by the reason of the occurrence of a "change of control" in the
Company and Unvested Stock to the extent not tendered in the Offer), equal to
the difference between the per share Offer Price and the per Share exercise
price of each such Option to the extent such difference is a positive number
(such amount as to the Options of each Stockholder being collectively referred
to herein as the "Option Consideration"). On the Purchase Date, Nortek, NTK and
the Company shall pay or shall cause to be paid the Option Consideration due in
respect of each Stockholder's Options as follows:

                     (i)    The Sub, or its permitted assign, in respect of the
       Options of each Stockholder, shall receive from the Option Consideration
       (A) in respect of Options having a per Share exercise price equal to or
       less than the Purchase Price, an amount equal to 75% of the excess of
       (x) the product of (1) the Offer Price, multiplied by (2) the number of
       Shares subject to such Options, including any "change of control"
       Shares, over (y) the product of (1) the number of Shares subject to such
       Options, including any "change of control" Shares, multiplied by (2) the
       Purchase Price and (B) in respect of Options having a per Share exercise
       price greater than the Purchase Price (as set forth on Schedule II
       hereto) an amount equal to 100% of the excess of (x) the product of (1)
       the Offer Price, multiplied by (2) the number of Shares subject to such
       Options, including any "change of control" Shares, over (y) the product
       of (1) the number of Shares subject to such Options, including any
       "change of control" Shares multiplied by (2) the applicable per Share
       exercise price of such Options; and

                     (ii)   Each Stockholder (or his designee), in respect of
       the Options of such Stockholder, shall receive the amount of the Option
       Consideration payable in respect of the Options of such Stockholder
       after deducting therefrom the amount payable pursuant to clause (i)
       above, provided, that as to any Stockholder subject to Section 16(a) of
       the Exchange Act, payment to such Stockholder of any portion of the
       Option Consideration payable under this clause (ii) will be deferred (if
       necessary to avoid Section 16(b) liability) until the first date such
       payment can be made without liability to such Stockholder under Section
       16(b) of the Exchange Act, but shall be paid as soon as practicable
       thereafter.

              The Company, Nortek and NTK hereby agree to extend to each holder
of Options who is not a party to this Agreement the opportunity to cash out
such Options on the Purchase Date in the manner contemplated in this Section
2(d).

       3.     OPTIONS.

              (a)    Each of the Stockholders hereby grants to Sub an
irrevocable option (each, a "Purchase Option" and collectively, the "Purchase
Options") to purchase the number of Shares set forth opposite such
Stockholder's name on Schedule I hereto together with all of the Shares





                                       4
<PAGE>   5
(including any additional Shares that may be issuable as a result of a "change
of control") Beneficially Owned by such Stockholder as a result of the
Stockholder's exercise of the Options set forth opposite such Stockholder's
name on Schedule II hereto (collectively, with the Shares described on Schedule
I, the "Option Shares") at a purchase price per share equal to the Purchase
Price. Subject to the last sentence of this Section 3(a), each Purchase Option
is currently exercisable in whole but not in part, and shall remain exercisable
in whole but not in part until 5:00 p.m. (Dallas, Texas time) on the date which
is 120 days after a Termination Event (the "Option Period"), so long as: (i)
all waiting periods under the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended (the "HSR Act"), required for the purchase by Sub of the
Option Shares upon such exercise shall have expired or been waived, and (ii)
there shall not be in effect any preliminary or final injunction or other order
issued by any court or governmental, administrative or regulatory agency or
authority prohibiting the exercise of the Purchase Options pursuant to this
Agreement. The Option Period shall be extended for the time period that any
such preliminary injunction or order shall be in effect that otherwise
prohibits the exercise of a Purchase Option. To exercise the Purchase Options,
Sub shall send a written notice (the "Notice") to the Stockholders identifying
the place and date (not less than one nor more than 20 business days from the
date of the Notice) for the closing of such purchase. The Sub shall not
exercise the Purchase Options prior to the occurrence of a Termination Event.

              (b)    Upon receipt of the Notice to the extent not previously
exercised, contemporaneously with the closing of the purchase of the Option
Shares, each Stockholder shall exercise in full the Options set forth opposite
such Stockholder's name on Schedule II hereto. Subject to Section 2(d), for
convenience purposes, in connection with such exercise of the Options, each
Stockholder hereby gives the Company irrevocable notice of the exercise of his
Options effective contemporaneously with the closing of the purchase of the
Option Shares pursuant to the Purchase Option and the Company hereby
acknowledges the effectiveness of such exercise. Each Stockholder also hereby
irrevocably instructs the Company to issue (and the Company hereby agrees to
issue) the Shares issuable upon such exercise in the name of Sub or its
permitted assignee (and Sub or its permitted assignee shall be deemed the
record owner thereof as of the date of such exercise so long as Sub or its
permitted assignee timely tenders payment of the Purchase Price as provided
herein) and Sub hereby agrees, on behalf of each Stockholder, to pay directly
to the Company (by means of wire transfer or official bank check) such amount
as may be necessary to fund the payment of the exercise price (without regard
to any applicable withholding taxes) due and payable to the Company as a result
of such exercise (with the aggregate amount of the Purchase Price due and
payable to each Stockholder (or his designee) being reduced by the amount of
any such payment made by Sub on behalf of such Stockholder and with the
remaining amount of the Purchase Price otherwise due and payable to each
Stockholder being paid directly to such Stockholder, as may be requested by the
Company net of any applicable withholding taxes required to be paid to the
Company, by means of wire transfer or official bank check). Such payments to
the Company (including such requested withholding taxes) and the Stockholders
shall be made contemporaneously with the exercise of the Purchase Options and
the delivery of the Option Shares thereunder, provided, that as to any
Stockholder subject to Section 16(a) of the Exchange Act, payment to such
Stockholder of any portion of the Purchase Price will be deferred (if necessary
to avoid Section 16(b)





                                       5
<PAGE>   6
liability) until the first date such payment can be made without liability to
such Stockholder under Section 16(b) of the Exchange Act, but shall be paid as
soon as practicable thereafter.

              (c)    In the event that Sub has purchased the Option Shares
pursuant to the Purchase Options, and, within one year after the date of such
purchase, the Sub or any affiliate thereof sells, transfers, exchanges or
disposes of any of the Option Shares in a transaction with a non-affiliate of
Sub (a "Disposition") then, within two business days after the closing of such
Disposition, Sub shall tender and pay to each Stockholder, in immediately
available funds, their respective pro-rata share (calculated based on the
respective amount of the Option Shares purchased from each Stockholder pursuant
to the Purchase Options) of 25% of the Net Profit realized by Sub in connection
with such Disposition. As used in this Section 3(c), Net Profit shall mean an
amount equal to (i) the excess, if any, of the gross amount realized by Sub
from a Disposition over (ii) the aggregate Purchase Price paid with respect to
the Option Shares subject to such Disposition, with such excess being reduced
by the sum of (A) all reasonable out-of-pocket fees, costs and expenses
incurred by Sub and its affiliates in connection with such Disposition
(including, without limitation, all fees, costs and expenses of counsel) which
in no event shall exceed 1% of such Net Profit, and (B) all customary brokerage
fees and commissions, if any, incurred in connection with such Disposition.

              (d)    In the event that within the Option Period a Stockholder
sells, transfers, exchanges, cancels or disposes of any of his Option Shares or
Options in connection with or as a result of an Acquisition Proposal (an
"Alternative Disposition") other than pursuant to Section 2 then, within two
business days after the closing of such Alternative Disposition, such
Stockholder shall tender and pay to Sub, in immediately available funds, its
pro-rata share of 75% of the Net Profit realized by such Stockholder in
connection with such Alternative Disposition. As used in this Section 3(d), Net
Profit shall mean (i) in the case of outstanding Option Shares, an amount equal
to the excess, if any, of (A) the gross amount realized by such Stockholder
from an Alternative Disposition of outstanding Option Shares, over (B) the
product of  (x) the number of such Option Shares subject to such Alternative
Disposition, multiplied by (y) the Purchase Price and (ii) in the case of
Options, an amount equal to the excess, if any, of (A) the product of (x) the
gross underlying per Share price otherwise paid in the Alternative Disposition
and used in calculating the amount so realized by such Stockholder with respect
to such Options in connection with such Alternative Disposition, multiplied by
(y) the number of Option Shares subject to such Options, over (B) the product
of (x) the number of Option Shares subject to such Options, multiplied by (y)
the Purchase Price, with the aggregate of such excesses being reduced by the
sum of (1) all reasonable out-of-pocket fees, costs and expenses incurred by
such Stockholder in connection with such Alternative Disposition, (including,
without limitation, all fees, costs and expenses of counsel, but excluding any
withholding taxes) which in no event shall exceed 1% of such Net Profit, and
(2) all customary brokerage fees and commissions, if any, incurred in
connection with such Alternative Disposition.

              (e)    As may be requested by Sub subsequent to a Termination
Event but prior to the expiration of the Option Period each Stockholder shall
tender his Shares as set forth on Schedule I hereto pursuant to any tender
offer being made (at a per Share price greater than the Purchase Price) in
connection with an Acquisition Proposal.





                                       6
<PAGE>   7
              (f)    The Purchase Options shall terminate in full upon the
consummation of the transactions (including, the tendering of all payments to
be made thereunder) contemplated by Section 2.

       4.     COVENANTS, REPRESENTATIONS AND WARRANTIES OF EACH STOCKHOLDER.

              (a)    Each Stockholder hereby, severally and not jointly and
severally, represents and warrants to the other parties hereto as follows:

                     (i)    OWNERSHIP BY SHARES. Such Stockholder is either (A)
       the record and Beneficial Owner of, or (B) the Beneficial Owner but not
       the record holder of, the number of Shares and Options respectively set
       forth opposite the Stockholder's name on Schedule I and II hereto. As of
       June 24, 1997, the Shares and Options respectively set forth opposite
       such Stockholder's name on Schedules I and II hereto constitute all of
       the Shares and Options owned of record or Beneficially Owned by such
       Stockholder. Such Stockholder has sole power to issue instructions with
       respect to the matters set forth in Sections 2 and 3 hereof, sole power
       of disposition, sole power of conversion, sole power to demand appraisal
       rights and sole power to agree to all of the matters set forth in this
       Agreement, in each case with respect to all of the Shares set forth
       opposite such Stockholder's name on Schedule I hereto and all of the
       Options set forth opposite such Stockholder's name on Schedule II
       hereto, with no material limitations, qualifications or restrictions on
       such rights, subject to applicable securities laws and the terms of this
       Agreement.

                     (ii)   POWER; BINDING AGREEMENT. Such Stockholder has the
       legal capacity, power and authority to enter into and perform all of
       such Stockholder's obligations under this Agreement. This Agreement has
       been duly and validly executed and delivered by such Stockholder and
       constitutes a valid and binding agreement of such Stockholder,
       enforceable against such Stockholder in accordance with its terms. There
       is no beneficiary or holder of a voting trust certificate or other
       interest of any trust of which such Stockholder is trustee whose consent
       is required for the execution and delivery of this Agreement or the
       consummation by such Stockholder of the transactions contemplated
       hereby. If such Stockholder is married and such Stockholder's Shares or
       Options constitute community property, this Agreement has been duly
       authorized, executed and delivered by, and constitutes a valid and
       binding agreement of, such Stockholder's spouse, enforceable against
       such person in accordance with its terms.

                     (iii)  NO CONFLICTS. Except for filings under the Exchange
       Act or if applicable the HSR Act (as to which, to the extent necessary,
       each Stockholder shall promptly make all such filings and use all
       reasonable efforts to respond to any requests for additional
       information) (A) no filing with, and no permit, authorization, consent
       or approval of, any state or federal public body or authority is
       necessary for the execution of this Agreement by such Stockholder and
       the consummation by such Stockholder of the transactions contemplated
       hereby, except where the failure to obtain such consent, permit,
       authorization, approval or filing would not interfere with such
       Stockholder's ability to





                                       7
<PAGE>   8
       perform its obligations hereunder, and (B) none of the execution and
       delivery of this Agreement by such Stockholder, the consummation by such
       Stockholder of the transactions contemplated hereby or compliance by
       such Stockholder with any of the provisions hereof shall (1) conflict
       with or result in any breach of any applicable organizational documents
       applicable to such Stockholder, (2) result in a violation or breach of,
       or constitute (with or without notice or lapse of time or both) a
       default (or give rise to any third party right of termination,
       cancellation, material modification or acceleration) under any of the
       terms, conditions or provisions of any note, bond, mortgage, indenture,
       license, contract, commitment, arrangement, understanding, agreement or
       other instrument or obligation of any kind to which such Stockholder is
       a party or by which such Stockholder or any of such Stockholder's
       properties or assets may be bound, or (3) violate any order, writ,
       injunction, decree, judgment, order, statute, rule or regulation
       applicable to such Stockholder or any of such Stockholder's properties
       or assets, in each such case except to the extent that any conflict,
       breach, default or violation would not interfere with the ability of
       such Stockholder to perform its obligations hereunder.

                     (iv)   NO ENCUMBRANCES. Except as required by Sections 2
       and 3 and liens or security interests that will be released at the
       closing, if any, of a purchase under the Purchase Options or a closing
       under Section 2 as may be applicable, such Stockholder's Shares and the
       certificates representing such Shares are now, and at all times during
       the term hereof will be, held by such Stockholder, or by a nominee or
       custodian for the benefit of such Stockholder, free and clear of all
       liens, claims, security interests, proxies, voting trusts or agreements,
       understandings or arrangements or any other encumbrances whatsoever.

                     (v)    NO FINDER'S FEES. No broker, investment banker,
       financial adviser or other person is entitled to any broker's, finder's,
       financial adviser's or other similar fee or commission in connection
       with the transactions contemplated hereby based upon arrangements made
       by or on behalf of such Stockholder.

                     (vi)   NO SOLICITATION. Each Stockholder shall, in its
       capacity as such, comply with the terms of Section 5.1(e) of the Nortek
       Agreement.

                     (vii)  RESTRICTION ON TRANSFER, PROXIES AND NON-
       INTERFERENCE. During the Option Period, except as required by this
       Agreement, such Stockholder shall not, directly or indirectly without
       the consent of Sub: (A) offer for sale, sell, transfer, tender, pledge,
       encumber, assign or otherwise dispose of, or enter into any contract,
       option or other arrangement or understanding with respect to or consent
       to the offer for sale, sale, transfer, tender, pledge, encumbrance,
       assignment or other disposition of, any or all of such Stockholder's
       Shares, Options or any interest therein, (B) grant any proxies of powers
       of attorney, deposit any Shares into a voting trust or enter into a
       voting agreement with respect to any Shares, or (C) exercise any of his
       Options (except to prevent the impending expiration thereof), or (D)
       take any action that could reasonably be expected to have the effect of
       preventing or disabling such Stockholder from performing such
       Stockholder's obligations





                                       8
<PAGE>   9
       under this Agreement, except in the case of clause (A) or (D) any
       transfer of Shares that occurs by operation of law.

                     (viii) WAIVER OF APPRAISAL RIGHTS. Such Stockholder hereby
       waives any rights of appraisal or rights to dissent from the Merger that
       the Stockholder may have.

                     (ix)   FURTHER ASSURANCES. From time to time, at the other
       party's request and without further consideration, each party hereto
       shall execute and deliver such additional documents as may be necessary
       or desirable to consummate and make effective, in the most expeditious
       manner practicable, the transactions contemplated by this Agreement.

              (b)    Parent and Sub hereby represents and warrants to each of
the other parties hereto as follows:

                     (i)    ORGANIZATION, STANDING AND CORPORATE POWER. Each of
       Parent and Sub is a corporation duly organized, validly existing and in
       good standing under the laws of the State of Delaware, with adequate
       corporate power and authority to own its properties and carry on its
       business as presently conducted. Each of Parent and Sub has the
       corporate power and authority to enter into and perform all of its
       obligations under this Agreement and to consummate the transactions
       contemplated hereby.

                     (ii)   NO CONFLICTS. Except, if applicable, for filings
       under the HSR Act, (A) no filing with, and no permit, authorization,
       consent or approval of, any state or federal pubic body or authority is
       necessary for the execution of this Agreement by either Parent or Sub
       and the consummation by Parent and Sub of the transactions contemplated
       hereby, except where the failure to obtain such consent, permit,
       authorization, approval or filing would not interfere with its ability
       to perform its obligations hereunder, and (B) none of the execution and
       delivery of this Agreement by Parent or Sub, the consummation by Parent
       or Sub of the transactions contemplated hereby or compliance by Parent
       and Sub with any of the provisions hereof shall (1) conflict with or
       result in any breach of any applicable organizational documents
       applicable to Parent or Sub, (2) result in a violation or breach of, or
       constitute (with or without notice or lapse of time or both) a default
       (or give rise to any third party right of termination, cancellation,
       material modification or acceleration) under any of the terms,
       conditions or provisions of any note, bond, mortgage, indenture,
       license, contract, commitment, arrangement, understanding, agreement or
       other instrument or obligation of any kind to which Parent or Sub is a
       party or by which Parent or Sub or any of Parent's or Sub's properties
       or assets may be bound, or (3) violate any order, writ, injunction,
       decree, judgment, order, statute, rule or regulation applicable to
       Parent or Sub or any of Parent's or Sub's properties or assets, in each
       such case except to the extent that any conflict, breach, default or
       violation would not interfere with the ability of Parent or Sub to
       perform its obligations hereunder.

                     (iii)  EXECUTION, DELIVERY AND PERFORMANCE BY PARENT AND
       SUB. The execution, delivery and performance of this Agreement and the
       consummation of the





                                       9
<PAGE>   10
       transactions contemplated hereby have been duly authorized by the Board
       of Directors of Parent and Sub, and each of Parent and Sub has taken all
       other actions required by law, its Certificate of Incorporation and its
       Bylaws in order to consummate the transactions contemplated by this
       Agreement. This Agreement constitutes the valid and binding obligations
       of Parent and Sub and is enforceable in accordance with its terms,
       except as enforceability may be subject to bankruptcy, insolvency,
       reorganization, moratorium or other similar laws relating to or
       affecting creditors' rights generally.

              (c)    Nortek and NTK hereby represents and warrants to each of
the other parties hereto as follows:

                     (i)    ORGANIZATION, STANDING AND CORPORATE POWER. Each of
       Nortek and NTK is a corporation duly organized, validly existing and in
       good standing under the laws of the State of Delaware, with adequate
       corporate power and authority to own its properties and carry on its
       business as presently conducted. Each of Nortek and NTK has the
       corporate power and authority to enter into and perform all of its
       obligations under this Agreement and to consummate the transactions
       contemplated hereby.

                     (ii)   NO CONFLICTS. Except, if applicable, for filings
       under the Exchange Act and the HSR Act, (A) no filing with, and no
       permit, authorization, consent or approval of, any state or federal
       pubic body or authority is necessary for the execution of this Agreement
       by either Nortek or NTK and the consummation by Nortek and NTK of the
       transactions contemplated hereby, except where the failure to obtain
       such consent, permit, authorization, approval or filing would not
       interfere with its ability to perform its obligations hereunder, and (B)
       none of the execution and delivery of this Agreement by Nortek or NTK,
       the consummation by Nortek or NTK of the transactions contemplated
       hereby or compliance by Nortek and NTK with any of the provisions hereof
       shall (1) conflict with or result in any breach of any applicable
       organizational documents applicable to Nortek or NTK, (2) result in a
       violation or breach of, or constitute (with or without notice or lapse
       of time or both) a default (or give rise to any third party right of
       termination, cancellation, material modification or acceleration) under
       any of the terms, conditions or provisions of any note, bond, mortgage,
       indenture, license, contract, commitment, arrangement, understanding,
       agreement or other instrument or obligation of any kind to which Nortek
       or NTK is a party or by which Nortek or NTK or any of Nortek's or NTK's
       properties or assets may be bound, or (3) violate any order, writ,
       injunction, decree, judgment, order, statute, rule or regulation
       applicable to Nortek or NTK or any of Nortek's or NTK's properties or
       assets, in each such case except to the extent that any conflict,
       breach, default or violation would not interfere with the ability of
       Nortek or NTK to perform its obligations hereunder.

                     (iii)  EXECUTION, DELIVERY AND PERFORMANCE BY NORTEK AND
       NTK. The execution, delivery and performance of this Agreement and the
       consummation of the transactions contemplated hereby have been duly
       authorized by the Board of Directors of Nortek and NTK, and each of
       Nortek and NTK has taken all other actions required by law, its
       Certificate of Incorporation and its Bylaws in order to consummate the
       transactions





                                       10
<PAGE>   11
       contemplated by this Agreement. This Agreement constitutes the valid and
       binding obligations of Nortek and NTK and is enforceable in accordance
       with its terms, except as enforceability may be subject to bankruptcy,
       insolvency, reorganization, moratorium or other similar laws relating to
       or affecting creditors' rights generally.

              (d)    The Company hereby represents and warrants to each of the
other parties hereto as follows:

                     (i)    ORGANIZATION, STANDING AND CORPORATE POWER. The
       Company is a corporation duly organized, validly existing and in good
       standing under the laws of the State of Delaware, with adequate
       corporate power and authority to own its properties and carry on its
       business as presently conducted. The Company has the corporate power and
       authority to enter into and perform all of its obligations under this
       Agreement and to consummate the transactions contemplated hereby.

                     (ii)   NO CONFLICTS. Except, if applicable, for filings
       under the HSR Act, (A) no filing with, and no permit, authorization,
       consent or approval of, any state or federal pubic body or authority is
       necessary for the execution of this Agreement by the Company and the
       consummation by the Company of the transactions contemplated hereby,
       except where the failure to obtain such consent, permit, authorization,
       approval or filing would not interfere with its ability to perform its
       obligations hereunder, and (B) none of the execution and delivery of
       this Agreement by the Company, the consummation by the Company of the
       transactions contemplated hereby or compliance by the Company with any
       of the provisions hereof shall (1) conflict with or result in any breach
       of any applicable organizational documents applicable to the Company,
       (2) result in a violation or breach of, or constitute (with or without
       notice or lapse of time or both) a default (or give rise to any third
       party right of termination, cancellation, material modification or
       acceleration) under any of the terms, conditions or provisions of any
       note, bond, mortgage, indenture, license, contract, commitment,
       arrangement, understanding, agreement or other instrument or obligation
       of any kind to which the Company is a party or by which the Company or
       any of the Company's properties or assets may be bound, or (3) violate
       any order, writ, injunction, decree, judgment, order, statute, rule or
       regulation applicable to the Company or any of the Company's properties
       or assets, in each such case except to the extent that any conflict,
       breach, default or violation would not interfere with the ability of the
       Company to perform its obligations hereunder.

                     (iii)  EXECUTION, DELIVERY AND PERFORMANCE BY THE COMPANY.
       The execution, delivery and performance of this Agreement and the
       consummation of the transactions contemplated hereby have been duly
       authorized by the Board of Directors of the Company, and the Company has
       taken all other actions required by law, its Certificate of
       Incorporation and its Bylaws in order to consummate the transactions
       contemplated by this Agreement. This Agreement constitutes the valid and
       binding obligations of the Company and is enforceable in accordance with
       its terms, except as enforceability may be subject to





                                       11
<PAGE>   12
       bankruptcy, insolvency, reorganization, moratorium or other similar laws
       relating to or affecting creditors' rights generally.

       5.     STOP TRANSFER. Each Stockholder agrees with, and covenants to,
Sub that during the Option Period such Stockholder shall not request that the
Company register (and the Company agrees not to register) the transfer (book-
entry or otherwise) of any certificate or uncertificated interest representing
any of such Stockholder's Shares, unless such transfer is made in compliance
with this Agreement.

       6.     RECAPITALIZATION. In the event of a stock dividend or
distribution, or any change in the Shares by reason of any stock dividend,
split-up, recapitalization, combination, exchange of shares or the like, the
term "Shares" shall be deemed to refer to and include the Shares as well as all
such stock dividends and distributions and any shares into which or for which
any or all of the Shares may be changed or exchanged and the Purchase Price
shall be amended as may be appropriate to reflect such event.

       7.     MERGER AGREEMENT. Parent, Sub and the Company hereby agree that
the provisions of Section 6.11 (insofar as it relates to the transactions
contemplated by this Agreement) and Section 9.2 of the Merger Agreement remain
in full force and effect notwithstanding the termination of the Merger
Agreement and that such Sections of the Merger Agreement are by reference
incorporated herein and made a part hereof. In addition, the Company hereby
acknowledges that the transactions contemplated herein have been previously
approved by its Board of Directors for purposes of Section 203 of the Delaware
General Corporation Law, as amended. Atrium Corporation, Parent and Sub hereby
acknowledge that the Merger Agreement has been properly terminated by the
Company in accordance with its terms.

       8.     STOCKHOLDER CAPACITY. No person executing this Agreement who is
or becomes during the term hereof a director or officer of the Company makes
any agreement or understanding herein in his or her capacity as such director
or officer and nothing herein shall limit or affect any action taken by such
person in his or her capacity as a director or officer. Each Stockholder signs
solely in his or her capacity as the record and beneficial owner of, or the
trustee of a trust whose beneficiaries are the beneficial owners of, such
Stockholder's Shares or Options.

       9.     OTHER ACTIONS. Except as contemplated by Section 2 or by
operation of law, during the Option Period no Stockholder may take any action
(including, without limitation, any cashless exercise of any Option except with
respect to an Option that would otherwise expire unless so exercised) or enter
into any agreement or waiver, which would adversely affect Sub's rights under
the Purchase Options or the benefits to be derived by Sub from an exercise of
the Purchase Options.

       10.    Release. Effective as of an Acquisition Event, each of the
Company, Nortek and NTK hereby releases and discharges Parent, Sub and Atrium
Corporation, together with their respective officers, directors, employees,
representatives and agents (collectively the "Released Parties") from any and
all liabilities, claims, causes of actions or demands of any nature whatsoever
(including, without limitation, arising under the Merger Agreement) that any of
them may have or





                                       12
<PAGE>   13
claim to have (including, without limitation, the reservation made in that
certain letter of July 24, 1997 from the Company to Parent, Sub and Atrium
Corporation giving notice of the Company's termination of the Merger Agreement)
which are directly or indirectly attributable to or otherwise related to the
payment of $12,000,000 made by the Company on July 24, 1997 pursuant to that
certain letter of July 24, 1997 from the Parent to the Company, regardless of
whether any such liabilities, claim, cause of action or demand is known or
unknown, matured or contingent or liquidated or unliquidated. Prior to the
occurrence of an Offer Termination Event, the Company agrees not to initiate
any proceedings against any of the Released Parties with respect to any of the
liabilities, claims, causes of actions or demands described in the foregoing
release. Notwithstanding any provision contained herein to the contrary, the
provisions of this Section 10 shall remain in full force and effect and shall
survive any termination or expiration of this Agreement and the consummation of
any of the transactions contemplated herein. As used in this Section 10, an
"Acquisition Event" shall mean the first to occur of (i) the acceptance of any
Shares for payment pursuant to the Offer, (ii) the consummation of the Merger
or (iii) the consummation of any Acquisition Proposal with Nortek of any of its
affiliates.

       11.    MISCELLANEOUS.

              (a)    ENTIRE AGREEMENT. This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof.

              (b)    CERTAIN EVENTS. Each Stockholder agrees that this
Agreement and the obligations hereunder shall attach to such Stockholder's
Shares and Options and shall be binding upon any person or entity to which
legal or beneficial ownership of such Shares or Options shall pass, whether by
operation of law or otherwise, including, without limitation, such
Stockholder's heirs, guardians, administrators or successors. Notwithstanding
any transfer of Shares or Options, the transferor shall remain liable for the
performance of all obligations under this Agreement of the transferor.

              (c)    ASSIGNMENT. This Agreement shall not be assigned by
operation of law or otherwise without the prior written consent of the other
parties, provided that Parent may assign, in its sole discretion, its rights
and obligations hereunder to any affiliate of Parent or, after a Termination
Event, to any person making an Acquisition Proposal, but no such assignment
shall relieve Parent of its obligations hereunder if such assignee does not
perform such obligations.

              (d)    AMENDMENTS, WAIVERS, ETC. This Agreement may not be
amended, changed, supplemented, waived or otherwise modified or terminated,
except upon the execution and delivery of a written agreement executed by the
parties hereto; provided that either Schedule I or II hereto may be
supplemented by Parent by adding the name and other relevant information
concerning any stockholder of the Company who agrees to be bound by the terms
of this Agreement without the agreement of any other party hereto, and
thereafter such added stockholder shall be treated as a "Stockholder" for all
purposes of this Agreement; provided further that after a Termination Event,
this Agreement may be amended, changed, supplemented, waived or otherwise
modified or





                                       13
<PAGE>   14
terminated without the consent of, or the execution of any written agreement on
the part of, Nortek and NTK, so long as such amendment, change, supplement,
waiver or modification does not increase the obligations of either Nortek or
NTK hereunder.

              (e)    NOTICES. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given (and shall be
deemed to have been duly received if so given) by hand delivery, telegram,
telex or telecopy, or by mail (registered or certified mail, postage prepaid,
return receipt requested) or by any courier service, such as Federal Express,
providing proof of delivery. All communications hereunder shall be delivered to
the respective parties at the following addresses or the addresses set forth on
the signature pages hereto:

              If to Mr. Silverman: Jeffrey S. Silverman
                                   At his home address as supplementally
                                   provided to the parties hereto.

              copy to:             Squadron Ellenoff Plesent & Sheinfeld
                                   551 5th Avenue
                                   New York, New York  10176
                                   Attn:  Joel I. Papernik
                                   Telecopy:  (212) 697-6686

              If to Mr. Dooskin:   Herbert P. Dooskin
                                   At his home address as supplementally
                                   provided to the parties hereto.

              copy to:             Squadron Ellenoff Plesent & Sheinfeld
                                   551 5th Avenue
                                   New York, New York  10176
                                   Attn:  Joel I. Papernik
                                   Telecopy:  (212) 697-6686

              If to Mr. Snyder:    Dana R. Snyder
                                   At his home address as supplementally
                                   provided to the parties hereto.

              copy to:             Debevoise & Plimpton
                                   875 Third Avenue
                                   New York, New York  10022
                                   Attn:  Richard D. Bohm
                                   Telecopy:  (212) 909-6836

              If to Parent or Sub: Atrium Acquisition Holdings Corp.





                                       14
<PAGE>   15
                                             and

                                   Atrium/PG Acquisition Corp.
                                   1341 West Mockingbird Lane
                                   Suite 1200 West
                                   Dallas, Texas  75247
                                   Attn:  Randall Fojtasek
                                   Telecopy:  (214) 630-5013

              copies to:           Hicks, Muse, Tate & Furst Incorporated
                                   200 Crescent Court, Suite 1600
                                   Dallas, Texas  75201
                                   Attn:  Jeffrey S. Fronterhouse
                                   Telecopy:  (214) 740-7313

                                   Hicks, Muse, Tate & Furst Incorporated
                                   200 Crescent Court, Suite 1600
                                   Dallas, Texas  75201
                                   Attn:  Lawrence D. Stuart, Jr.
                                   Telecopy: (214) 740-7313

                                   Vinson & Elkins L.L.P.
                                   3700 Trammell Crow Center
                                   2001 Ross Avenue
                                   Dallas, Texas  75201-2975
                                   Attn:  A. Winston Oxley
                                   Telecopy: (214) 999-7891

              If to the Company:   Ply Gem Industries, Inc.
                                   777 Third Avenue
                                   New York, New York  10017
                                   Attn:  Jeffrey S. Silverman
                                   Telecopy: (212) 888-0472

              copy to:             Cleary, Gottlieb, Steen & Hamilton
                                   One Liberty Plaza
                                   New York, New York  10006
                                   Attn:  Victor Lewkow
                                   Telecopy:  (212) 225-3999





                                       15
<PAGE>   16
              If to Nortek or NTK: Nortek, Inc. and NTK Sub, Inc.
                                   50 Kennedy Plaza
                                   Providence, RI  02903
                                   Attn:  Richard L. Bready
                                   Telecopy:  (401) 751-4610

              copy to:             Ropes & Gray
                                   One International Place
                                   Boston, Massachusetts  02110
                                   Attn:  David C. Chapin, Esq.
                                   Telecopy:  (617) 951-7050

or to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

              (f)    SEVERABILITY. Whenever possible, each provision or portion
of any provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision in such jurisdiction, and this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision or portion of any provision had never been
contained herein.

              (g)    SPECIFIC PERFORMANCE. Each of the parties hereto
recognizes and acknowledges that a breach by it of any covenants or agreements
contained in this Agreement will cause the other party to sustain damages for
which it would not have an adequate remedy at law for money damages, and
therefore each of the parties hereto agrees that in the event of any such
breach the aggrieved party shall be entitled to the remedy of specific
performance of such covenants and agreements and injunctive and other equitable
relief in addition to any other remedy to which it may be entitled, at law or
in equity.

              (h)    REMEDIES CUMULATIVE. All rights, powers and remedies
provided under this Agreement or otherwise available in respect hereof at law
or in equity shall be cumulative and not alternative, and the exercise of any
thereof by any party shall not preclude the simultaneous or later exercise of
any other such right, power or remedy by such party.

              (i)    NO WAIVER. The failure of any party hereto to exercise any
right, power or remedy provided under this Agreement or otherwise available in
respect hereof at law or in equity, or to insist upon compliance by any other
party hereto with its obligations hereunder, and any custom or practice of the
parties at variance with the terms hereof, shall not constitute a waiver by
such party of its right to exercise any such or other right, power or remedy or
to demand such compliance.





                                       16
<PAGE>   17
              (j)    NO THIRD PARTY BENEFICIARIES. This Agreement is not
intended to be for the benefit of, and shall not be enforceable by, any person
or entity who or which is not a party hereto; provided that, in the event of a
Stockholder's death, the benefits to be received by the Stockholder hereunder
shall inure to his successors and heirs.

              (k)    GOVERNING LAW. This Agreement shall be governed and
construed in accordance with the laws of the State of Delaware, without giving
effect to the principles of conflicts of law thereof.

              (l)    JURISDICTION. Each party hereby irrevocably submits to the
exclusive jurisdiction of the Court of Chancery in the State of Delaware in any
action, suit or proceeding arising in connection with this Agreement, and
agrees that any such action, suit or proceeding shall be brought only in such
court (and waives any objection based on forum non conveniens or any other
objection to venue therein); provided, however, that such consent to
jurisdiction is solely for the purpose referred to in this paragraph (l) and
shall not be deemed to be a general submission to the jurisdiction of said
Court or in the State of Delaware other than for such purposes. Each party
hereto hereby waives any right to a trial by jury in connection with any such
action, suit or proceeding.

              (m)    DESCRIPTIVE HEADINGS. The descriptive headings used herein
are inserted for convenience of reference only and are not intended to be part
of or to affect the meaning or interpretation of this Agreement.

              (n)    COUNTERPARTS. This Agreement may be executed in
counterparts, each of which shall be deemed to be an original, but all of
which, taken together, shall constitute one and the same Agreement. This
Agreement shall not be effective as to any party hereto until such time as this
Agreement or a counterpart thereof has been executed and delivered by each
party hereto.

              (o)    PRIOR AGREEMENT. This agreement is executed and delivered
as an Amendment and Restatement of that certain Stockholders Agreement dated as
of June 24, 1997, between the parties hereto and this Agreement shall supersede
such prior agreement in its entirety.

              (p)    TRUST FUNDS. In the event that any party hereto should
receive any funds that are to be paid to another party pursuant to the terms of
this Agreement, then the receiving party shall hold such funds in trust for the
benefit of the party entitled to receive such funds and shall promptly pay such
funds to the party entitled to receive such funds in accordance with this
Agreement.

       12.    ACKNOWLEDGMENT BY COMPANY. The parties hereby acknowledge and
agree that the acceptance of any Shares for payment pursuant to the Offer or
other tender offer for a majority of the outstanding Shares will constitute a
"change of control" under the terms of the various agreements governing the
Options set forth on Schedule II hereto and that for purposes of the
transactions contemplated by this Agreement all restrictions on transferability
and vesting applicable to any of the Unvested Stock or restricted Shares on
Schedule I hereto shall be terminated.





                                       17
<PAGE>   18
       IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed on this ______ day of July, 1997.



                                                                                
                                   ---------------------------------------------
                                   Jeffrey S. Silverman


                                                                                
                                   ---------------------------------------------
                                   Dana R. Snyder


                                                                                
                                   ---------------------------------------------
                                   Herbert P. Dooskin


                                   Atrium Acquisition Holdings Corp.



                                   By:                                          
                                      ------------------------------------------
                                   Name:                                        
                                        ----------------------------------------
                                   Title:                                       
                                         ---------------------------------------


                                   Atrium/PG Acquisition Corp.



                                   By:                                          
                                      ------------------------------------------
                                   Name:                                        
                                        ----------------------------------------
                                   Title:                                       
                                         ---------------------------------------

                                   Ply Gem Industries, Inc.


                                   By:                                          
                                      ------------------------------------------
                                   Name:                                        
                                        ----------------------------------------
                                   Title:                                       
                                         ---------------------------------------





                                       18
<PAGE>   19

                                   Nortek, Inc.


                                   By:                                          
                                      ------------------------------------------
                                   Name:                                        
                                        ----------------------------------------
                                   Title:                                       
                                         ---------------------------------------


                                   NTK Sub, Inc.


                                   By:                                          
                                      ------------------------------------------
                                   Name:                                        
                                        ----------------------------------------
                                   Title:                                       
                                         ---------------------------------------





                                       19
<PAGE>   20
                                 SCHEDULE I TO
                             STOCKHOLDERS AGREEMENT


<TABLE>
<CAPTION>
                          NAME OF STOCKHOLDER                                   NUMBER OF SHARES OWNED       
 ---------------------------------------------------------------------   ------------------------------------
 <S>                                                                                       <C>
 Herbert P. Dooskin                                                                            1,337
 Dana R. Snyder                                                                                3,747
 Jeffrey S. Silverman                                                                      1,130,177
 Jeffrey S. Silverman, Restricted Stock                                                      100,000
</TABLE>

Excludes shares owned by pension/profit share/401(K)/TRA Plans.
<PAGE>   21
                                 SCHEDULE II TO
                             STOCKHOLDERS AGREEMENT


<TABLE>
<CAPTION>
                                        OPTION         NUMBER OF            OPTION
                NAME                     DATE           SHARES               PRICE          TYPE       
 ---------------------------------  -------------   ---------------   ------------------   -------
 <S>                                   <C>              <C>                  <C>          <C>
 Herbert P. Dooskin                    01/28/88           8,000               $10.750      ISO
                                       01/28/88          75,000                10.750      NQSO
                                       01/28/88          75,000                10.750      Note 1
                                       01/26/89          75,000                12.250      NQSO
                                       01/26/89          75,000                12.250      Note 1
                                       01/26/89           8,000                12.250      ISO
                                       01/23/92          10,000                 9.750       ISO
                                       11/24/92          75,000                10.250      NQSO
                                       01/29/93          75,000                12.000      NQSO
                                       05/20/93           9,000                10.375      ISO
                                       11/07/94          50,000                19.125      NQSO
                                                                                     
 Jeffrey S. Silverman                  01/28/88         300,000                10.750      NQSO
                                       01/28/88         300,000                10.750      Note 1
                                       01/26/89         300,000                12.250      NQSO
                                       01/26/89         300,000                12.250      Note 1
                                       11/24/92         325,000                10.250      NQSO
                                       01/29/93         513,500                12.000      NQSO
                                       05/20/93           9,000                10.375      ISO
                                       11/07/94         750,000                19.125      NQSO
                                       08/20/96         750,000                12.500      NQSO
                                                                                     
 Note 1. Options on Change of Control                                                
                                                                                     
 Dana R. Snyder                        06/02/95            6,250               16.000      ISO
                                       06/02/95          293,750               16.000      NQSO
                                       10/27/95          250,000               16.000      NQSO
                                       01/02/96            6,060               16.500      ISO
                                       01/02/96          210,782               16.500      NQSO
                                       08/20/96           33,158               12.500      NQSO
                                       08/20/96          116,842               12.500      NQSO
</TABLE>

<PAGE>   1
                                                                   EXHIBIT 99(2)



                          FINANCIAL ADVISORY AGREEMENT


         THIS FINANCIAL ADVISORY AGREEMENT (this "Agreement") is made and
entered into as of November 27, 1996 among Atrium Corporation, a Delaware
corporation, ("Holdings"), Atrium Companies, Inc., a Delaware corporation, (the
"Company"), and Hicks, Muse & Co. Partners, L.P., a Texas limited partnership
(together with its successors, "HMCo").

         WHEREAS, certain affiliates of HMCo are simultaneously with the
execution of this Agreement, purchasing 32,000,000 shares of the common stock
of Holdings (the "Acquisition") and as a result of the Acquisition, the debt
and equity financing thereof and certain other transactions related thereto
(collectively with the Acquisition, the "Transaction") such affiliates will own
82% of the outstanding shares of common stock of Holdings;

         WHEREAS, Holdings and the Company have requested that HMCo render, and
HMCo has rendered, financial advisory services to Holdings and the Company in
connection with the negotiation of the Transaction; and

         WHEREAS, Holdings and the Company have requested that HMCo render
financial advisory, investment banking and other similar services to them with
respect to any future proposals for a tender offer, acquisition, sale, merger,
exchange offer, recapitalization, restructuring or other similar transaction
directly involving the Company or any of its subsidiaries and any other person
or entity (collectively, "Add-on Transactions");

         NOW, THEREFORE, in consideration of the services rendered and to be
rendered by HMCo to Holdings and the Company, and to evidence the obligations
of Holdings and the Company to HMCo and the mutual covenants herein contained,
Holdings and the Company hereby jointly and severally agree with HMCo as
follows:

         1.      Retention.

                 (a)      Holdings and the Company hereby acknowledge that they
have retained HMCo, and HMCo acknowledges that it has acted, as financial
advisor to Holdings and the Company in connection with the Transaction.

                 (b)      Each of Holdings and the Company acknowledges that it
has retained HMCo as its exclusive financial advisor in connection with any
Add-on Transactions that may be consummated during the term of this Agreement,
and that Holdings and the Company will not retain any other person or entity to
provide such services in connection with any such Add-on Transaction without
the prior written consent of HMCo. HMCO agrees that it shall provide such
financial advisory, investment banking and other similar services in connection
with any such Add-on Transaction as may be requested from time to time by the
board of directors of Holdings.
<PAGE>   2
         2.      Term.  The term of this Agreement shall continue until the
earlier to occur of (i) the tenth anniversary of the date hereof or (ii) the
date on which HMCo's affiliates cease to own beneficially, directly or
indirectly, any securities of Holdings, the Company or their successors.

         3.      Compensation.

                 (a)      As compensation for HMCo's services as financial
advisor to Holdings and the Company in connection with the Transaction, the
Company hereby irrevocably agrees to pay, and Holdings hereby agrees to cause
the Company to pay, to HMCo a cash fee of $2,000,000 to be paid at the closing
of the Transaction, which will occur substantially simultaneously with the
execution of this Agreement.  The parties hereto agree that the compensation
due pursuant to this Section 3(a) shall be allocated among the segments of the
financing for the Transaction in proportion to the dollar amount of each such
segment.

                 (b)      As compensation for HMCo's financial advisory,
investment banking and other similar services rendered in connection with any
Add-on Transaction pursuant to Section 1(b) hereof, Holdings and the Company
shall, and Holdings shall cause the Company to, pay to HMCo, at the closing of
any such Add-on Transaction, a cash fee in the amount of 1.5% of the
Transaction Value of such Add-on Transaction.  As used herein, the term
"Transaction Value" means the total value of the Add-on Transaction, including,
without limitation, the aggregate amount of the funds required to complete the
Add-on Transaction (excluding any fees payable pursuant to this Section 3(b))
including the amount of any indebtedness, preferred stock or similar items
assumed (or remaining outstanding).

         4.      Reimbursement of Expenses.  In addition to the compensation to
be paid pursuant to Section 3 hereof, Holdings and the Company agree to, and
Holdings shall cause the Company to, reimburse HMCo, promptly following demand
therefor, together with invoices or reasonably detailed descriptions thereof,
for all reasonable disbursements and out-of-pocket expenses (including fees and
disbursements of counsel) incurred by HMCo (i) as financial advisor to Holdings
and the Company in connection with the Transaction or (ii) in connection with
the performance by it of the services contemplated by Section 1(b) hereof.

         5.      Indemnification.  Holdings and the Company jointly and
severally shall indemnify and hold harmless each of HMCo, its affiliates and
their respective directors, officers, controlling persons (within the meaning
of Section 15 of the Securities Act of 1933 or Section 20(a) of the Securities
Exchange Act of 1934), if any, agents and employees (HMCo, its affiliates, and
such other specified persons being collectively referred to as "Indemnified
Persons" and individually as an "Indemnified Person") from and against any and
all claims, liabilities, losses, damages and expenses incurred by any
Indemnified Person (including those arising out of an Indemnified Person's
negligence and fees and disbursements of the respective Indemnified Person's
counsel) which (A) are related to or arise out of (i) actions taken or omitted
to be taken (including any untrue statements made or any statements omitted to
be made) by Holdings and/or the Company or (ii) actions taken or omitted to be
taken by an Indemnified Person with Holdings' or the Company's consent or in
conformity with Holdings' or the Company's instructions or Holdings' or the
Company's actions or omissions or (B) are otherwise related to or arise out of
HMCo's engagement, and will reimburse each Indemnified Person for all costs and
expenses, including fees of any Indemnified Person's





                                      -2-
<PAGE>   3
counsel, as they are incurred, in connection with investigating, preparing for,
defending, or appealing any action, formal or informal claim, investigation,
inquiry or other proceeding, whether or not in connection with pending or
threatened litigation, caused by or arising out of or in connection with HMCo's
acting pursuant to the engagement, whether or not any Indemnified Person is
named as a party thereto and whether or not any liability results therefrom.
Neither Holdings nor the Company will, however, be responsible for any claims,
liabilities, losses, damages or expenses pursuant to clause (B) of the
preceding sentence that have resulted primarily from HMCo's bad faith, gross
negligence or willful misconduct.  Holdings and the Company also agree that
neither HMCo nor any other Indemnified Person shall have any liability to
Holdings or the Company for or in connection with such engagement except for
any such liability for claims, liabilities, losses, damages, or expenses
incurred by Holdings and/or the Company that have resulted primarily from
HMCo's bad faith, gross negligence or willful misconduct.  Holdings and the
Company further agree that neither of them will, without the prior written
consent of HMCo, settle or compromise or consent to the entry of any judgment
in any pending or threatened claim, action, suit or proceeding in respect of
which indemnification may be sought hereunder (whether or not any Indemnified
Person is an actual or potential party to such claim, action, suit or
proceeding) unless such settlement, compromise or consent includes an
unconditional release of HMCo and each other Indemnified Person hereunder from
all liability arising out of such claim, action, suit or proceeding.  HOLDINGS
AND THE COMPANY EACH HEREBY ACKNOWLEDGE THAT THE FOREGOING INDEMNITY SHALL BE
APPLICABLE TO ALL CLAIMS, LIABILITIES, LOSSES, DAMAGES OR EXPENSES THAT HAVE
RESULTED FROM OR ARE ALLEGED TO HAVE RESULTED FROM THE ACTIVE OR PASSIVE OR THE
SOLE, JOINT OR CONCURRENT ORDINARY NEGLIGENCE OF HMCO OR ANY OTHER INDEMNIFIED
PERSON.

         The foregoing right to indemnity shall be in addition to any rights
that HMCo and/or any other Indemnified Person may have at common law or
otherwise and shall remain in full force and effect following the completion or
any termination of the engagement.  Holdings and the Company hereby consent to
personal jurisdiction and to service and venue in any court in which any claim
which is subject to this Agreement is brought against HMCo or any other
Indemnified Person.

         It is understood that, in connection with HMCo's engagement, HMCo may
also be engaged to act for Holdings and/or the Company in one or more
additional capacities, and that the terms of this engagement or any such
additional engagements may be embodied in one or more separate written
agreements.  This indemnification shall apply to the engagement specified in
the first paragraph hereof as well as to any such additional engagement(s)
(whether written or oral) and any modification of said engagement or such
additional engagement(s) and shall remain in full force and effect following
the completion or termination of said engagement or such additional
engagements.

         Holdings and the Company further understand and agree that if HMCo is
asked to furnish Holdings and/or the Company a financial opinion letter or act
for Holdings and/or the Company in any other formal capacity, such further
action may be subject to a separate agreement containing provisions and terms
to be mutually agreed upon.

         6.      Confidential Information.  In connection with the performance
of the services hereunder, HMCo agrees not to divulge any confidential
information, secret processes or trade secrets disclosed by Holdings or the
Company to it solely in its capacity as a financial advisor, unless Holdings
and the Company consent to the divulging thereof or such information, secret
processes





                                      -3-
<PAGE>   4
or trade secrets are publicly available or otherwise available to HMCo without
restriction or breach of any confidentiality agreement or unless required by
any governmental authority or in response to any valid legal process.

         7.      Governing Law.  This Agreement shall be construed,
interpreted, and enforced in accordance with the laws of the State of Texas,
excluding any choice-of-law provisions thereof.

         8.      Assignment.  This Agreement and all provisions contained
herein shall be binding upon and inure to the benefit of the parties hereto and
their respective successors and assigns; provided, however, neither this
Agreement nor any of the rights, interests or obligations hereunder shall be
assigned (other than with respect to the rights and obligations of HMCo, which
may be assigned to any one or more of its principals or affiliates) by any of
the parties without the prior written consent of the other parties.

         9.      Counterparts.  This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument, and the signature of any
party to any counterpart shall be deemed a signature to, and may be appended
to, any other counterpart.

         10.     Other Understandings.  All discussions, understandings and
agreements heretofore made between any of the parties hereto with respect to
the subject matter hereof are merged in this Agreement, which alone fully and
completely expresses the Agreement of the parties hereto.




              [THE REMAINDER OF THIS PAGE IS INTENTIONALLY BLANK]





                                      -4-
<PAGE>   5
         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed as of the day and year first above written.

                                     HICKS, MUSE & CO. PARTNERS, L.P.
                                     
                                     By:      HM PARTNERS INC.,
                                              its General Partner
                                     
                                     
                                     
                                              By: /s/ MICHAEL D. SALIM
                                                  ------------------------
                                                   Michael D. Salim
                                                   Chief Financial Officer
                                                  
                                     
                                     ATRIUM CORPORATION
                                     
                                     
                                     
                                     By: /s/ RANDALL S. FOJTASEK
                                        ------------------------
                                         Randall S. Fojtasek
                                         President
                                     
                                     
                                     ATRIUM COMPANIES, INC.
                                     
                                     
                                     
                                     By: /s/ RANDALL S. FOJTASEK
                                        ------------------------
                                         Randall S. Fojtasek
                                         President


                [SIGNATURE PAGE TO FINANCIAL ADVISORY AGREEMENT]

                                      S-1







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