AMENDMENT NO. 1
                                        TO THE
                           AMENDED AND RESTATED BY-LAWS OF
                              NCI BUILDING SYSTEMS, INC.

                                    March 17, 1999


     The Amended and Restated By-Laws, dated as of February 5, 1992 (the
"By-Laws"), of NCI Building Systems, Inc., a Delaware corporation (the
"Company") are hereby amended as follows:

     1.   The first sentence of Article V, Section 1 is hereby amended to
read in its entirety as follows:

          "The elected officers of the corporation shall be a chief
     executive officer, a chief operating officer, a president, one or more
     vice presidents, with or without such descriptive titles as the board
     of directors shall deem appropriate, a secretary and a treasurer and,
     if the board of directors so elects a chairman of the board (who shall
     be a director) and a controller."

and the following sentence is added at the end of Article V, Section 1:

     "Unless otherwise provided in a resolution of the board of directors
     or a written directive of the chief executive officer, each of the
     officers of the corporation shall have general authority to agree upon
     and execute all bonds, evidences of indebtedness, deeds, leases,
     contracts, and other obligations in the name of the corporation and
     affix the corporate seal thereto."

     2.   Article V, Section 5 of the By-Laws is hereby amended by replacing
the word "president" therein with the words "chief executive officer and
chief operating officer".

     3.   Article V, Section 6 of the By-Laws is hereby amended to read in
its entirety as follows:

          "Section 6.  DUTIES OF THE CHIEF EXECUTIVE OFFICER.  The chief
     executive officer shall have responsibility for and general
     supervision of the affairs of the corporation and shall have general
     and active executive charge, management, and control of all the
     business, operations, and properties of the corporation with all such
     powers as may be reasonably incident to such responsibilities, subject
     to the provisions of these by-laws and the control of the board of
     directors.  Unless a chairman of the board shall have been elected,
     the chief executive officer shall preside, when present, at all
     meetings of stockholders and at all meetings of the board of
     directors.  The chief executive officer shall be the ranking officer
     of the



     corporation, to whom all other officers shall be subordinate, and he
     shall be responsible for and see that all orders and resolutions
     of the stockholders and the board of directors are carried into effect.
     The chief executive officer shall have the power and authority to sign
     stock certificates; to cause the employment or appointment of such
     employees and agents of the corporation as the proper conduct of
     operations may require; to terminate, remove or suspend any employee
     or agent who shall have been employed or appointed under his authority
     or under authority of an officer subordinate to him; to suspend for cause
     any officer subordinate to the chief executive officer, pending final
     action by the board of directors or such other authority as shall have
     elected or appointed such officer; to delegate any of the foregoing
     powers and authority to any other officer or agent of the corporation;
     and, in general, to exercise all the powers and authority usually
     appertaining to the chief executive officer of a corporation (except
     as otherwise provided in these by-laws or in resolutions or written
     directives of the board of directors), as may be designated in accordance
     with these by-laws, and as from time to time may be assigned to him by the
     board of directors.  In the absence of the chief executive officer, his
     duties shall be performed and his powers may be exercised by the chief
     operating officer, if different from the chief executive officer and
     president, by the president in the absence of the chief operating
     officer, or otherwise by such other officer as the chief executive
     officer shall designate in writing or (failing such designation) by
     the executive committee (if any has been appointed) or such officer as
     it may designate in writing, subject, in either case, to review and
     superseding action by the board of directors."

     4.   Article V of the By-Laws is hereby amended by adding new Section 6A
and new Section 6B, which shall read in their entirety as follows:

          "Section 6A.   DUTIES OF THE CHIEF OPERATING OFFICER.  The chief
     operating officer shall have general, active supervision of and
     responsibility for the business operations of the corporation, subject
     to the review and approval of the chief executive officer.   The chief
     operating officer shall have the same authority and powers with
     respect to the conduct of the business operations of the corporation
     as has the chief executive officer with respect to its affairs
     generally.  As such, he shall have all such powers and authority as
     may be reasonably incident to such responsibilities and as usually
     appertain to the chief operating officer of a corporation (except as
     otherwise provided in these by-laws or in resolutions or written
     directives of the board of directors or chief executive officer), as
     well as other powers and authority as may be designated in accordance
     with these by-laws and as from time to time may be assigned to him by
     the board of directors or the chief executive officer.  He shall
     preside, in the absence of any other person designated by these
     by-laws, at all meetings of the board of directors and shareholders.
     He shall have the power and authority to sign stock certificates.  The
     chief operating officer shall report

                                       2



     to the chief executive officer and otherwise shall be the ranking officer
     of the corporation to whom all other officers shall be subordinate."

          "Section 6B.   DUTIES OF THE PRESIDENT.  The president shall be
     the chief executive officer and/or the chief operating officer of the
     corporation, unless a chief executive officer or a chief operating
     officer is otherwise elected.  The president shall  have all powers
     and authority as usually appertain to the president of a corporation
     (except as otherwise provided in these by-laws or in resolutions or
     written directives of the board of directors or chief executive
     officer), as well as other powers and authority as may be designated
     in accordance with these by-laws and as from time to time may be
     assigned to him by the board of directors or the chief executive
     officer.    He shall have the power and authority to sign stock
     certificates."

     5.   Article V, Section 8 of the By-Laws is hereby amended by replacing
the word "president" therein with the words "chief executive officer or chief
operating officer".

     6.   Article V, Section 9 of the By-Laws is hereby amended by replacing
the word "president" therein with the words "chief executive officer".

     7.   The first sentence of Article VII, Section 1 of the By-Laws is
hereby amended by adding the phrase "the chief executive officer, the chief
operating officer," immediately before the words "the president".

     8.   Any reference to the "by-laws" in the By-Laws shall be deemed to be
a reference to the By-Laws, as amended by this Amendment No. 1.

                                       3