NCI BUILDING SYSTEMS, INC.




                                    COMMON STOCK

                                 ($0.01 Par Value)



                               UNDERWRITING AGREEMENT



____________, 1998





                               UNDERWRITING AGREEMENT


                                             ____________, 1998


Warburg Dillon Read LLC
535 Madison Avenue
New York, New York  10022

J.C. Bradford & Co.
330 Commerce Street
Nashville, Tennessee 37201

Wheat First Union
Riverfront Plaza
Richmond, Virginia 23219

Dain Rauscher Wessels
(a division of Dain Rauscher Incorporated)
2711 North Haskell Avenue
Suite 2400
Dallas, Texas 75204-2936

  as Managing Underwriters

Dear Sirs:

     NCI Building Systems, Inc., a Delaware corporation (the "Company"), 
proposes to issue and sell and the persons named in Schedule B (the "Selling 
Shareholders") propose to sell to the underwriters named in Schedule A (the 
"Underwriters") an aggregate of 3,800,000 shares (the "Firm Shares") of 
Common Stock, par value $ 0.01 per share (the "Common Stock"), of the 
Company, of which 3,500,000 shares are to be issued and sold by the Company 
and an aggregate of 300,000 shares are to be sold by the Selling Shareholders 
in the respective amounts set forth opposite their names in Schedule B.  In 
addition, solely for the purpose of covering overallotments, the Company 
[and the Selling Shareholders] propose[s] to issue and sell, at the 
Underwriters' option, up to 570,000 additional shares of the Common Stock 
(the "Additional Shares") [of which _________ shares may be issued and sold by 
the Company and an aggregate of ____________ shares may be sold by the Selling
Shareholders



in the respective amounts set forth opposite their names in Schedule B].  The 
Additional Shares and the Firm Shares are collectively referred to as the 
"Shares".  The Shares are described in the Prospectus which is referred to 
below.

     The Company has filed, in accordance with the provisions of the 
Securities Act of 1933, as amended, and the rules and regulations thereunder 
(collectively, the "Act"), with the Securities and Exchange Commission (the 
"Commission") a registration statement on Form S-3, including a prospectus, 
relating to the Shares, which incorporates by reference documents that the 
Company has filed in accordance with the provisions of the Securities 
Exchange Act of 1934, as amended, and the rules and regulations thereunder 
(collectively, the "Exchange Act").  The Company has furnished to you, for 
use by the Underwriters and by dealers, copies of one or more preliminary 
prospectuses and all documents incorporated by reference therein 
(collectively, the "Preliminary Prospectus") relating to the Shares.  Except 
where the context otherwise requires, the registration statement as in effect 
at the time of execution of this Agreement or, if the registration statement 
is not yet effective, as amended when it becomes effective, including all 
documents filed as a part thereof or incorporated by reference therein, and 
including any registration statement filed pursuant to Rule 462(b) under the 
Act increasing the size of the offering registered under the Act and any 
information contained in a prospectus subsequently filed with the Commission 
pursuant to Rule 424(b) under the Act and deemed to be part of the 
registration statement at the time of effectiveness pursuant to Rule 430A 
under the Act, is herein called the "Registration Statement", and the 
prospectus, including all documents incorporated therein by reference, in the 
form filed by the Company with the Commission pursuant to Rule 424(b) under 
the Act or, if no such filing is required, in the form of final prospectus 
included in the Registration Statement at the time it became effective, is 
herein called the "Prospectus".

     The Company, the Selling Shareholders and the Underwriters agree as 
follows:

     1.   SALE AND PURCHASE.  On the basis of the representations and 
warranties and the other terms and conditions herein set forth, the Company 
and each Selling Shareholder, severally and not jointly, agrees to sell to 
the respective Underwriters and each of the Underwriters, severally and not 
jointly, agrees to purchase from the Company and each Selling Shareholder the 
respective number of Firm Shares (subject to such adjustment as you may 
determine to avoid fractional shares) which bears the same 

                                       2



proportion to the number of Firm Shares to be sold by the Company or by that 
Selling Shareholder, as the case may be, as the number of Firm Shares set 
forth opposite the name of such Underwriter on Schedule A bears to the total 
number of Firm Shares to be sold by the Company and the Selling Shareholders, 
in each case at a purchase price of $____ per Share.  You may release the 
Firm Shares for public sale promptly after this Agreement becomes effective.  
You may from time to time increase or decrease the public offering price 
after the initial public offering to such extent as you may determine.

     In addition, on the basis of the representations and warranties and the 
other terms and conditions herein set forth, the Company [and each Selling 
Shareholder, severally and not jointly,] hereby grants to the several 
Underwriters an option to purchase, and the Underwriters shall have the right 
to purchase, severally and not jointly, from the Company all or a portion of 
the Additional Shares as may be necessary to cover overallotments made in 
connection with the offering of the Firm Shares, at the same purchase price 
per share to be paid by the several Underwriters to the Company and the 
Selling Shareholders for the Firm Shares.  This option may be exercised in 
whole or in part from time to time on or before the thirtieth day following 
the date hereof, by written notice to the Company.  Any such notice shall set 
forth the aggregate number of Additional Shares as to which the option is 
being exercised, and the date and time when the Additional Shares are to be 
delivered (any such date and time being herein referred to as an "additional 
time of purchase"); PROVIDED, HOWEVER, that no additional time of purchase 
shall occur earlier than the time of purchase (as defined below) nor earlier 
than the second business day * after the date on which the option shall have 
been exercised nor later than the eighth business day after the date on which 
the option shall have been exercised.  The number of Additional Shares to be 
sold to each Underwriter at an additional time of purchase shall be the 
number which bears the same proportion to the aggregate number of Additional 
Shares being purchased at such additional time of purchase as the number of 
Firm Shares set forth opposite the name of such Underwriter on Schedule A 
bears to the total number of Firm Shares (subject, in each case, to such 
adjustment as you may determine to eliminate fractional shares).

- -------------------------
*    As used herein, "business day" shall mean a day on which the New York 
Stock Exchange is open for trading.

                                       3




     2.   PAYMENT AND DELIVERY.  Payment of the purchase price for the Firm 
Shares shall be made to the Company and to the Attorney-in-fact referred to 
in Section 4(d) on behalf of the Selling Shareholders by certified or 
official bank checks, in immediately available funds, at the office of 
Warburg Dillon Read LLC in New York City, against delivery of the 
certificates for the Firm Shares to you for the respective accounts of the 
Underwriters.  Such payment and delivery shall be made at 9:30 A.M., New York 
City time, on ____________, 1998 (unless another time shall be agreed to by 
you, the Company and the Selling Shareholders or unless postponed in 
accordance with the provisions of Section 10).  The time at which such 
payment and delivery are actually made is called the "time of purchase".  
Certificates for the Firm Shares shall be delivered to you in definitive form 
in such names and in such denominations as you shall specify on the second 
business day preceding the time of purchase.  For the purpose of expediting 
the checking of the certificates for the Firm Shares by you, the Company and 
the Selling Shareholders agree to make such certificates available to you for 
such purpose at least one full business day preceding the time of purchase.

     Payment of the purchase price for the Additional Shares shall be made at 
the additional time of purchase in the same manner and at the same office as 
the payment for the Firm Shares.  Certificates for the Additional Shares 
shall be delivered to you in definitive form in such names and in such 
denominations as you shall specify on the second business day preceding the 
additional time of purchase.  For the purpose of expediting the checking of 
the certificates for the Additional Shares by you, the Company and the 
Selling Shareholders agree to make such certificates available to you for 
such purpose at least one full business day preceding the additional time of 
purchase.

     3.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND THE SELLING 
SHAREHOLDERS.  The Company and each of the Selling Shareholders, jointly and 
severally, represent and warrant to each of the Underwriters that:

          (a)  Each Preliminary Prospectus filed as part of the Registration
     Statement as originally filed or as part of any amendment thereto, or filed
     pursuant to Rule 424 under the Act, complied when so filed in all material
     respects with the Act; when the Registration Statement becomes or became
     effective and at all times subsequent thereto up to the time of purchase
     and the additional time of purchase, the Registration Statement and the
     Prospectus, and any supplements or amendments thereto, complied and will
     comply in all material 

                                       4



     respects with the provisions of the Act; and the Registration Statement at
     all such times did not and will not contain an untrue statement of a 
     material fact or omit to state a material fact required to be stated 
     therein or necessary to make the statements therein not misleading, and 
     the Prospectus at all such times did not and will not contain an untrue 
     statement of a material fact or omit to state a material fact required to
     be stated therein or necessary to make the statements therein, in light of
     the circumstances under which they were made, not misleading; PROVIDED, 
     HOWEVER, that the Company and the Selling Shareholders make no 
     representation or warranty with respect to any statement contained in the 
     Registration Statement or the Prospectus in reliance upon and in conformity
     with information concerning the Underwriters and furnished in writing by or
     on behalf of any Underwriter through you to the Company expressly for use 
     in the Registration Statement or the Prospectus and set forth in the 
     section of the Registration Statement and the Prospectus entitled 
     "Underwriting"; the documents incorporated by reference in the Prospectus, 
     at the time they were filed with the Commission, complied in all material 
     respects with the requirements of the Exchange Act, and do not contain an 
     untrue statement of a material fact or omit to state a material fact 
     required to be stated therein or necessary to make the statements therein,
     in light of the circumstances under which they were made, not misleading.

          (b)  As of the date of this Agreement, the Company has an authorized
     capitalization as set forth under the column entitled "April 30, 1998
     Actual" in the section of the Registration Statement and the Prospectus
     entitled "Capitalization" and, as of the time of purchase, the
     capitalization of the Company will be as set forth under the column
     entitled "April 30, 1998 As Adjusted" in the section of the Registration
     Statement and the Prospectus entitled "Capitalization"; all of the issued
     and outstanding shares of capital stock of the Company have been duly
     authorized and validly issued and are fully paid and nonassessable and are
     free of statutory and contractual preemptive rights. 

          (c)  The Company has been duly organized and is validly existing as a
     corporation in good standing under the laws of the State of Delaware with
     full power and authority to (i) own its properties and conduct its business
     as described in the Registration Statement and the Prospectus and
     (ii) execute and deliver this Agreement and to issue, sell and deliver the
     Shares as herein contemplated.

                                       5



          (d)  Except as described in the Prospectus with respect to Doublecote,
     L.L.C., Metallic de Mexico, S.A. de C.V., Building Systems de Mexico, S.A.
     de C.V. and Midwest Metal Coating, L.L.C., all of the issued and
     outstanding shares of capital stock of each of the subsidiaries of the
     Company (the "Subsidiaries") are owned directly by the Company; all of such
     shares have been duly authorized and validly issued and are fully paid and
     nonassessable and, except as described in the Prospectus, are owned free
     and clear of any pledge, lien, encumbrance, security interest or other
     claim; there are no outstanding rights, subscriptions, warrants, calls,
     preemptive rights, options or other agreements of any kind with respect to
     the capital stock of any of the Subsidiaries.

          (e)  Each of the corporate Subsidiaries has been duly incorporated and
     is validly existing as a corporation in good standing under the laws of its
     respective jurisdiction of incorporation, with full corporate power and
     authority to own its respective properties and to conduct its respective
     businesses.  Each of the limited partnership Subsidiaries has been duly
     organized and is validly existing as a limited partnership in good standing
     (or the equivalent thereto) under the laws of its respective jurisdiction
     of organization, with full limited partnership power and authority to own
     its respective properties and to conduct its respective businesses.

          (f)  Each of the Company and each of the Subsidiaries is duly
     qualified or licensed by and is in good standing (or the equivalent
     thereto) in each jurisdiction in which it owns or leases property or
     conducts its business and in each other jurisdiction in which the failure,
     individually or in the aggregate, to be so qualified or licensed could have
     a material adverse effect on the properties, assets, operations, business,
     business prospects or condition (financial or other) of the Company and the
     Subsidiaries taken as a whole; each of the Company and each of the
     Subsidiaries is in compliance in all material respects with the laws,
     orders, rules, regulations and directives issued or administered by each
     such jurisdiction.

          (g)  Neither the Company nor any of the Subsidiaries is in breach of,
     or in default under (nor has any event occurred which with notice, lapse of
     time or both would constitute a breach of, or default under), its charter
     or bylaws, or in the performance or observance of any obligation,
     agreement, covenant or condition contained in any license, indenture,
     lease, 

                                       6




     mortgage, deed of trust, bank loan or credit agreement, material supply 
     agreement or other agreement or instrument to which the Company or any of 
     the Subsidiaries is a party or by which any of them may be bound or 
     affected.  The execution, delivery and performance of this Agreement, 
     the issuance and sale of the Shares, the application of the net proceeds 
     thereof as described in the Prospectus and the consummation of the 
     transactions contemplated hereby will not conflict with, or result in 
     any breach of or constitute a default under (nor constitute any event 
     which with notice, lapse of time or both would constitute a breach of, 
     or default under), the charter bylaws or other organizational document 
     of the Company or any of the Subsidiaries or under any provision of any 
     license, indenture, lease, mortgage, deed of trust, bank loan or credit 
     agreement, material supply agreement or other agreement or instrument to 
     which the Company or any of the Subsidiaries is a party or by which any 
     of them or their properties may be bound or affected, or under any 
     federal, state, local or foreign law, regulation or rule or any decree, 
     judgment or order applicable to the Company or any of the Subsidiaries.

          (h)  The Firm Shares and the Additional Shares, when issued and 
     delivered to and paid for by the Underwriters as contemplated hereby, 
     will be duly authorized and validly issued and fully paid and 
     nonassessable, free and clear of any pledge, lien, encumbrance, security 
     interest, preemptive right or other claim.

          (i)  This Agreement has been duly authorized, executed and 
     delivered by the Company.

          (j)  The capital stock of the Company, including the Shares, 
     conforms in all material respects to the description thereof contained 
     in the Registration Statement and the Prospectus; and the certificates 
     for the Shares are in due and proper form and the holders of the Shares 
     after making payment therefor will not be subject to personal liability 
     by reason of being such holders.

          (k)  No approval, authorization, consent or order of or filing with 
     any federal, state, local or foreign governmental or regulatory 
     commission, board, body, authority or agency is required in connection 
     with the issuance and sale of the Shares as contemplated hereby, other 
     than registration of the Shares under the Act, clearance of the offering 
     of the Shares with the National Association of Securities Dealers, Inc. 
     (the

                                       7



     "NASD") and any necessary qualification under the securities or blue sky 
     laws of the various jurisdictions in which the Shares are being offered 
     by the Underwriters.

          (l)  Each person who has the right, contractual or otherwise, to 
     cause the Company to register pursuant to the Act any securities of the 
     Company in consequence of the issue and sale of the Shares to the 
     Underwriters hereunder either included such securities in the 
     Registration Statement or duly waived such right and each person who has 
     the right, contractual or otherwise, to cause the Company to issue to it 
     any securities of the Company in consequence of the issue and sale of 
     the Shares to the Underwriters hereunder has duly waived such right.

          (m)  Ernst & Young LLP, whose reports on the consolidated financial 
     statements of the Company and the Subsidiaries are included or 
     incorporated by reference in the Registration Statement and the 
     Prospectus, are independent public accountants with respect to the 
     Company as required by the Act and the applicable published rules and 
     regulations thereunder.

          (n)  All legal or governmental proceedings, contracts or documents 
     of a character required to be described in the Registration Statement or 
     the Prospectus or to be filed as an exhibit to the Registration 
     Statement have been so described or filed as required.

          (o)  There is no action, suit or proceeding pending or threatened 
     against the Company or any of the Subsidiaries or any of their 
     properties, at law or in equity, or before or by any federal, state, 
     local or foreign governmental or regulatory commission, board, body, 
     authority or agency that could result in a judgment, decree or order 
     having a material adverse effect on the properties, assets, operations, 
     business, business prospects or condition (financial or other) of the 
     Company and the Subsidiaries taken as a whole.

          (p)  The audited and unaudited financial statements included in the 
     Registration Statement and the Prospectus present fairly the 
     consolidated financial condition of the Company and the Subsidiaries as 
     of the dates indicated and the consolidated results of operations and 
     cash flows of the Company and the Subsidiaries for the periods 
     specified; such financial statements have been prepared in conformity 
     with generally accepted accounting principles applied on a 

                                       8



     consistent basis during the periods involved.  The pro forma financial 
     statements contained in the Registration Statement and Prospectus have 
     been prepared on a basis consistent with the financial statements 
     referred to above and, except for the pro forma adjustments specified 
     therein, include all material adjustments to the historical financial 
     data required by Rule 11-02 of Regulation S-X to reflect the MBCI 
     Acquisition and the Offering (as defined in the Prospectus), and give 
     effect to assumptions made on a reasonable basis and present fairly the 
     historical and proposed transactions contemplated by the Prospectus and 
     this Agreement.

          (q)  Subsequent to the respective dates as of which information is 
     given in the Registration Statement and the Prospectus, and except as 
     may be otherwise stated in the Registration Statement or the Prospectus, 
     there has not been:  (A) any material adverse change in the properties, 
     assets, operations, business, business prospects or condition (financial 
     or other), present or prospective, of the Company and the Subsidiaries 
     taken as a whole; (B) any transaction, that is material to the Company 
     and the Subsidiaries taken as a whole, contemplated or entered into by 
     the Company or any of the Subsidiaries; or (C) any obligation, 
     contingent or otherwise, directly or indirectly incurred by the Company 
     or any of the Subsidiaries that is material to the Company and the 
     Subsidiaries taken as a whole.

          (r)  The Company has obtained the agreement of the shareholders 
     listed on Schedule C not to sell, contract to sell, grant any option to 
     sell, transfer or otherwise dispose of, directly or indirectly, any 
     shares of Common Stock, or securities convertible into or exchangeable 
     for Common Stock or warrants or other rights to purchase Common Stock 
     for a period of 90 days from the date of the Prospectus without the 
     prior written consent of Warburg Dillon Read LLC.

          (s)  Neither the Company nor any of the Subsidiaries has violated 
     any foreign, federal, state or local law or regulation relating to the 
     protection of human health and safety, the environment or hazardous or 
     toxic substances or wastes, pollutants or contaminants ("Environmental 
     Laws"), nor any federal or state law relating to discrimination in the 
     hiring, promotion or pay of employees nor any applicable federal or 
     state wages and hours laws, nor any provisions of the Employee 
     Retirement Income Security Act or the rules and regulations promulgated 

                                       9



     thereunder, which in each case might result in any material adverse 
     effect on the properties, assets, operations, business, business 
     prospects or condition (financial or other) of the Company and the 
     Subsidiaries taken as a whole.

          (t)  The Company and each of the Subsidiaries has such permits, 
     licenses, franchises and authorizations of governmental or regulatory 
     authorities ("permits"), including without limitation under any 
     applicable Environmental Laws, as are necessary to own, lease and 
     operate its respective properties and to conduct its business; the 
     Company and each of the Subsidiaries has fulfilled and performed all of 
     its material obligations with respect to such permits and no event has 
     occurred which allows, or after notice or lapse of time would allow, 
     revocation or termination thereof or results in any other material 
     impairment of the rights of the holder of any such permit; and, except 
     as described in the Prospectus, such permits contain no restrictions 
     that are materially burdensome to the Company or any of the Subsidiaries.

          (u)  In the ordinary course of its business, the Company conducts a 
     periodic review of the effect of Environmental Laws on the business, 
     operations and properties of the Company and the Subsidiaries, in the 
     course of which it identifies and evaluates associated costs and 
     liabilities (including without limitation any capital or operating 
     expenditure required for clean-up, closure of properties or compliance 
     with Environmental Laws or any permit, license or approval, any related 
     constraints on operating activities and any potential liabilities to 
     third parties).  On the basis of such review, the Company reasonably has 
     concluded that such associated costs and liabilities, singly or in the 
     aggregate, would not have a material adverse effect on the properties, 
     assets, operations, business, business prospects or condition (financial 
     or other) of the Company and the Subsidiaries taken as a whole.

          (v)  Neither the Company nor any of the Subsidiaries, nor any 
     employee of the Company or any of the Subsidiaries, has made any payment 
     of funds of the Company or any of the Subsidiaries prohibited by law, 
     and no funds of the Company or any of the Subsidiaries have been set 
     aside to be used for any payment prohibited by law.

          (w)  The Company and the Subsidiaries have filed all federal or 
     state income or franchise tax returns required to be filed and have paid 
     all taxes shown 

                                       10



     thereon as due, and there is no material tax deficiency which has been 
     or might be asserted against the Company or any of the Subsidiaries; all
     material tax liabilities are adequately provided for on the books of the 
     Company and the Subsidiaries.

          (x)  The Company has not incurred any liability for any finder's 
     fees or similar payments in connection with the transactions herein 
     contemplated.

          (y)  The Company and the Subsidiaries have good title to all 
     properties and assets owned or leased by them, in each case free and 
     clear of all liens, security interests, pledges, charges, encumbrances, 
     mortgages and defects (except such as are described or referred to in 
     the Prospectus and the financial statements and the notes thereto 
     contained therein or such as do not interfere with the use made and 
     proposed to be made of such property by the Company and the 
     Subsidiaries).

          (z)  Neither the Company nor any of the Subsidiaries is an 
     "investment company" within the meaning of the Investment Company Act of 
     1940, as amended, or is subject to regulation under such Act.

     4.   FURTHER REPRESENTATIONS AND WARRANTIES OF THE SELLING SHAREHOLDERS.  
Each Selling Shareholder, severally and not jointly, further represents and 
warrants to each Underwriter that:

          (a)  Such Selling Shareholder is and at the time of delivery of the 
     Shares to be sold by such Selling Shareholder will be the lawful owner 
     of the number of Shares or securities convertible into or warrants 
     exercisable for the number of Shares to be sold by such Selling 
     Shareholder pursuant to this Agreement and, at the time of delivery 
     thereof, will have valid and marketable title to such Shares, and upon 
     delivery of and payment for such Shares the Underwriters will acquire 
     valid and marketable title to such Shares free and clear of any claim, 
     lien, encumbrance, security interest, community property right, 
     restriction on transfer or other defect in title, assuming each of the 
     Underwriters has purchased the Shares purchased by it in good faith and 
     without notice of any adverse claim.

          (b)  Such Selling Shareholder has and at the time of delivery of 
     such Shares will have full legal right, power and capacity, and any 
     approval required by law to sell, assign, transfer and deliver such 
     Shares in the manner provided in this Agreement.

                                       11



          (c)  This Agreement has been duly authorized, executed and 
     delivered by such Selling Shareholder.  The Power of Attorney executed 
     by the Selling Shareholders (the "Power of Attorney") and the Custody 
     Agreement among the Selling Shareholders and Harris Trust and Savings 
     Bank (the "Custody Agreement") have been duly executed and delivered by 
     such Selling Shareholder and are legal, valid and binding agreements of 
     such Selling Shareholder, enforceable in accordance with their terms, 
     except as the enforceability thereof may be limited by bankruptcy, 
     insolvency, reorganization, moratorium or similar laws affecting 
     creditors' rights generally and general principles of equity.

          (d)  Such Selling Shareholder has duly and irrevocably authorized 
     the Attorney-in-Fact (as defined in the Power of Attorney), on behalf of 
     such Selling Shareholder, to execute and deliver this Agreement and any 
     other document necessary or desirable in connection with the 
     transactions contemplated hereby and to deliver the Shares to be sold by 
     such Selling Shareholder and receive payment therefor pursuant hereto.

          (e)  The sale of the Shares by such Selling Shareholder pursuant 
     hereto is not prompted by any material adverse information concerning 
     the Company; and all information furnished in writing by or on behalf of 
     such Selling Shareholder specifically for use in the Registration 
     Statement and the Prospectus, and any supplement or amendment thereto, 
     is and will be when the Registration Statement became effective and at 
     all times subsequent thereto up to the time of purchase [AND THE 
     ADDITIONAL TIME OF PURCHASE], true and correct and complete and at all 
     such times did not and will not contain any untrue statement of material 
     fact or omit to state a material fact required to be stated therein or 
     necessary to make the statements therein, in light of the circumstances
     under which they were made, not misleading.

          (f)  The consummation of the transactions contemplated hereby and 
     by the Power of Attorney and by the Custody Agreement and the 
     fulfillment of the terms hereof and thereof will not constitute a breach 
     or violation of or default under any trust, indenture, agreement or 
     other instrument to which any such Selling Shareholder is a party or by 
     which any such Selling Shareholder is bound.

                                       12



     5.   CERTAIN COVENANTS OF THE COMPANY.  The Company hereby agrees:

          (a)  to furnish such information as may be required and otherwise 
     to cooperate in qualifying the Shares for offering and sale under the 
     securities or blue sky laws of such states as you may designate and to 
     maintain such qualifications in effect as long as required for the 
     distribution of the Shares, provided that the Company shall not be 
     required to qualify as a foreign corporation or to consent to the 
     service of process under the laws of any such state (except service of 
     process with respect to the offering and sale of the Shares); promptly 
     to advise you of the receipt by the Company of any notification with 
     respect to the suspension of the qualification of the Shares for sale in 
     any jurisdiction or the initiation or threatening of any proceeding for 
     such purpose; and to use its best efforts to obtain the withdrawal of 
     any order of suspension at the earliest practicable moment;

          (b)  to make available to you in New York City, as soon as 
     practicable after the Registration Statement becomes effective, and 
     thereafter from time to time to furnish to the Underwriters, as many 
     copies of the Prospectus (or of the Prospectus as amended or 
     supplemented if the Company shall have made any amendment or supplement 
     thereto after the effective date of the Registration Statement) as the 
     Underwriters may request for the purposes contemplated by the Act;

          (c)  to advise you promptly and if requested by you to confirm such 
     advice in writing, (i) when the Registration Statement has become 
     effective and when any post-effective amendment thereto becomes 
     effective and (ii) when the Prospectus is filed with the Commission 
     pursuant to Rule 424(b) under the Act, if required under the Act (which 
     the Company agrees to file in a timely manner under such Rule);

          (d)  to advise you promptly, confirming such advice in writing, of 
     any request by the Commission for amendments or supplements to the 
     Registration Statement or the Prospectus or for additional information 
     with respect thereto, or of notice of institution of proceedings for or 
     the entry of a stop order suspending the effectiveness of the 
     Registration Statement and, if the Commission should enter a stop order 
     suspending the effectiveness of the Registration Statement, to use its 
     best efforts to obtain the lifting or removal of such order as soon as 
     possible; to advise you promptly of any proposal to amend or supplement 
     the Registration 

                                       13



     Statement or the Prospectus, including by filing any document that would 
     be incorporated therein by reference, and to file no such amendment or 
     supplement to which you shall object in writing;

          (e)  to furnish to you and, upon request to each of the other 
     Underwriters, for a period of five years from the date of this Agreement 
     (i) copies of all reports or other communications that the Company shall 
     send to its shareholders or from time to time shall publish or publicly 
     disseminate and (ii) copies of all annual, quarterly and current reports 
     filed with the Commission on Forms 10-K, 10-Q and 8-K, or such other 
     similar form as may be designated by the Commission, and any other 
     document filed by the Company pursuant to Section 12, 13, 14 or 15(d) of 
     the Exchange Act;

          (f)  to advise the Underwriters promptly of the happening of any 
     event known to the Company within the time during which a prospectus 
     relating to the Shares is required to be delivered under the Act that, 
     in the reasonable judgment of the Company, would require the making of 
     any change in the Prospectus then being used, or in the information 
     incorporated therein by reference, so that the Prospectus, as then 
     supplemented, would not include an untrue statement of a material fact 
     or omit to state a material fact necessary to make the statements 
     therein, in the light of the circumstances under which they are made, 
     not misleading and, during such time, promptly to prepare and furnish, 
     at the Company's expense, to the Underwriters such amendments or 
     supplements to such Prospectus as may be necessary to reflect any such 
     change in such quantities as requested by the Underwriters, and to 
     furnish to you a copy of such proposed amendment or supplement before 
     filing any such amendment or supplement with the Commission;

          (g)  to make generally available to its security holders, and to 
     deliver to you, an earnings statement of the Company (which need not be 
     audited and which will satisfy the provisions of Section 11(a) of the 
     Act including, at the option of the Company, Rule 158) covering a period 
     of 12 months beginning after the effective date of the Registration 
     Statement but ending not later than 15 months after the date of the 
     Registration Statement, as soon as is reasonably practicable after the 
     termination of such 12-month period;

          (h)  to furnish to you five signed copies of the Registration 
     Statement, as initially filed with the 

                                       14



     Commission, and of all amendments thereto (including all exhibits thereto 
     and documents incorporated by reference therein) and sufficient conformed 
     copies of the foregoing (other than exhibits) for distribution of a copy 
     to each of the other Underwriters; 

          (i)  to furnish to you as early as practicable prior to the time of 
     purchase and the additional time of purchase, as the case may be, but 
     not later than two business days prior thereto, a copy of the latest 
     available unaudited interim consolidated financial statements, if any, 
     of the Company and the Subsidiaries that have been read by the Company's 
     independent certified public accountants as stated in their letter to be 
     furnished pursuant to Section 8(b);

          (j)  to apply the net proceeds from the sale of the Shares sold by 
     the Company in the manner set forth under the caption "Use of Proceeds" 
     in the Registration Statement and the Prospectus;

          (k)  to use its best efforts to cause the Shares to be approved for 
     listing on the New York Stock Exchange;

          (l)  whether or not the transactions contemplated in this Agreement 
     are consummated or this Agreement otherwise becomes effective or is 
     terminated, to pay all expenses, fees and taxes (other than (x) any 
     transfer taxes and (y) fees and disbursements of your counsel except as 
     set forth under Section 5 and clauses (iv) and (vi) below) in connection 
     with (i) the preparation and filing of the Registration Statement, each 
     Preliminary Prospectus, the Prospectus and any amendment or supplement 
     thereto, and the printing and furnishing of copies of each thereof to 
     you and to dealers (including costs of mailing and shipment), (ii) the 
     issuance, sale and delivery of the Shares, (iii) the word processing or 
     printing of this Agreement and any dealer agreements, and the 
     reproduction or printing and furnishing of copies of each thereof to you 
     and to dealers (including costs of mailing and shipment), (iv) the 
     qualification of the Shares for offering and sale under state laws as 
     aforesaid (including legal fees and filing fees and other disbursements 
     of your counsel) and the printing and furnishing of copies of any blue 
     sky surveys to you and to dealers, (v) any listing of the Shares on any 
     securities exchange or qualification of the Shares for listing on the 
     New York Stock Exchange and any registration thereof under the Exchange 
     Act, (vi) any filing for review of the public offering of the Shares 

                                       15



     by the NASD and (viii) the performance of the Company's and the Selling 
     Shareholders' other obligations hereunder;

          (m)  not to sell, contract to sell, grant any option to sell, 
     transfer or otherwise dispose of, directly or indirectly, any shares of 
     Common Stock or securities convertible into or exchangeable for Common 
     Stock or warrants or other rights to purchase Common Stock or permit the 
     registration under the Act of any shares of Common Stock, except for the 
     registration of the Shares and the sales to you pursuant to this 
     Agreement for a period commencing on the date hereof and continuing for 
     90 days after the date of the Prospectus, without the prior written 
     consent of Warburg Dillon Read LLC; and

          (n)  to refrain from investing the proceeds from the sale of the 
     Shares in a manner to cause the Company or any of the Subsidiaries to 
     become an "investment company" within the meaning of the Investment 
     Company Act of 1940, as amended.

     6.   CERTAIN COVENANTS OF THE SELLING SHAREHOLDERS.  Each Selling 
Shareholder agrees with each Underwriter that such Selling Shareholder will 
not sell, contract to sell, grant any option to sell, transfer or otherwise 
dispose of, directly or indirectly, any shares of Common Stock or securities 
convertible into or exchangeable for Common Stock or warrants or other rights 
to purchase Common Stock, except for the sales to you pursuant to this 
Agreement, for a period commencing on the date hereof and continuing for 90 
days after the date of the Prospectus, without the prior written consent of 
Warburg Dillon Read LLC.

     7.   REIMBURSEMENT OF UNDERWRITERS' EXPENSES.  If the Firm Shares or the 
Additional Shares are not delivered for any reason, other than the failure of 
the Underwriters to purchase the Firm Shares or the Additional Shares as 
provided herein (unless such failure is permitted under the provisions of 
Section 8 or Section 9(b) of this Agreement), the Company will reimburse the 
Underwriters for all of their out-of-pocket expenses, including the fees and 
disbursements of their counsel.

     8.   CONDITIONS OF UNDERWRITERS' OBLIGATIONS.  The several obligations 
of the Underwriters hereunder are subject to the accuracy of the 
representations and warranties on the part of the Company and the Selling 
Shareholders on the date hereof and at the time of purchase (and the several 
obligations of the Underwriters at any 

                                       16



additional time of purchase are subject to the accuracy of the 
representations and warranties on the part of the Company and the Selling 
Shareholders on the date hereof and at the time of purchase and at such 
additional time of purchase, as the case may be), the performance by each of 
the Company and the Selling Shareholders of their obligations hereunder and 
to the following conditions:

          (a)  The Company shall furnish to you at the time of purchase and 
     at such additional time of purchase, as the case may be, an opinion of 
     Gardere & Wynne, L.L.P., counsel for the Company and the Selling 
     Shareholders, addressed to the Underwriters and dated the time of 
     purchase or such additional time of purchase, as the case may be, with 
     reproduced copies for each of the other Underwriters and in form 
     satisfactory to Gibson, Dunn & Crutcher LLP, counsel for the 
     Underwriters, stating that:

            (i)  the Company has been duly incorporated and is validly existing
          as a corporation in good standing under the laws of the State of 
          Delaware, with full corporate power and authority (A) to own its 
          properties and conduct its business as described in the 
          Registration Statement and the Prospectus and (B) to execute and 
          deliver this Agreement and to issue, sell and deliver the Shares as 
          herein contemplated;

           (ii)  each of the Subsidiaries has been duly incorporated (or, in 
          the case of limited partnership Subsidiaries, duly organized) and 
          is validly existing as a corporation or limited partnership, as the 
          case may be, in good standing (or equivalent thereto) under the 
          laws of the state in which such Subsidiary is incorporated, with 
          full corporate power and authority (or, in the case of limited 
          partnership Subsidiaries, full limited partnership power and 
          authority) to own its properties and to conduct its business as 
          described in the Registration Statement and the Prospectus;

           (iii) each of the Company and each of the Subsidiaries is duly 
          qualified or licensed to do business by and is in good standing as 
          a foreign corporation, or foreign limited partnership, as the case 
          may be, in each jurisdiction in which it conducts business or owns 
          property and in which the failure, individually or in the 
          aggregate, to be so licensed or qualified could have a material 
          adverse effect on the properties, assets, 

                                       17



          operations, business, business prospects or condition (financial or 
          other) of the Company and the Subsidiaries taken as a whole;

           (iv)  all of the issued and outstanding shares of capital stock 
          (including partnership interests) of each Subsidiary have been duly 
          authorized and validly issued and are fully paid and nonassessable 
          and, except as set forth in the Prospectus, are owned, directly or 
          indirectly, by the Company free and clear of any pledge, lien, 
          encumbrance, security interest, preemptive right or other claim, 
          and there are no rights, warrants, options or other agreements to 
          acquire or instruments convertible into or exchangeable for any 
          shares of capital stock or other equity interest of any Subsidiary, 
          except as set forth in the Prospectus;

           (v)  this Agreement has been duly authorized, executed and 
          delivered by the Company;

           (vi)  (a) the Shares, when delivered to and paid for by the 
          Underwriters, will be duly authorized, validly issued, fully paid 
          and nonassessable, and will be free of any pledge, lien, 
          encumbrance, claim or preemptive right; and (b) the certificates for 
          the Shares are in due and proper form and the holders of the Shares 
          will not be subject to personal liability by reason of being such 
          holders;

           (vii)  (a) the Company has an authorized capitalization as set 
          forth under the heading "Capitalization" in the Registration 
          Statement and the Prospectus, and (b) the outstanding shares of 
          capital stock of the Company have been duly authorized and validly 
          issued and are fully paid, nonassessable and free of statutory and 
          contractual preemptive rights;

           (viii)  the capital stock of the Company, including the Shares, 
          conforms in all material respects to the description thereof 
          contained in the Registration Statement and the Prospectus;

            (ix)   the Registration Statement and the Prospectus (except as 
          to the financial statements and schedules contained or incorporated 
          by reference therein as to which such counsel need express no 
          opinion) comply as to form in all 

                                       18



          material respects with the requirements of the Act;

            (x)  the Registration Statement has become effective under the 
          Act and, to the best of such counsel's knowledge, no stop order 
          proceedings with respect thereto are pending or threatened under 
          the Act;

           (xi)   no approval, authorization, consent or order of or filing 
          with any federal, state, local or foreign governmental or 
          regulatory commission, board, body, authority or agency is required 
          in connection with the issuance or sale of the Shares as 
          contemplated hereby other than registration of the Shares under the 
          Act (except such counsel need express no opinion as to any 
          necessary qualification under the state securities or blue sky laws 
          of the various jurisdictions in which the Shares are being offered 
          by the Underwriters);

          (xii)   the execution, delivery and performance of this Agreement 
          by the Company, the issuance and sale of the Shares, the 
          application of the net proceeds thereof as described in the 
          Prospectus and the consummation by the Company of the transactions 
          contemplated hereby do not and will not conflict with, or result in 
          any breach of, or constitute a default under (nor constitute any 
          event which with notice, lapse of time or both would constitute a 
          breach of or default under), the charter or bylaws of the Company 
          or any of the Subsidiaries, or any provision of any license, 
          indenture, lease, mortgage, deed of trust, bank loan or credit 
          agreement or other agreement or instrument to which the Company or 
          any of the Subsidiaries is a party or by which the Company or any 
          of the Subsidiaries or their properties are bound or affected, or 
          under any federal, state, local or foreign law, regulation or rule 
          or any decree, judgment or order applicable to the Company or any 
          of the Subsidiaries;

          (xiii)   to the best of such counsel's knowledge, neither the 
          Company nor any of the Subsidiaries is in breach of or in default 
          under (nor has any event occurred which with notice, lapse of time 
          or both would constitute a breach of or default under) any license, 
          indenture, lease, mortgage, deed of trust, bank loan or credit 
          agreement or any other agreement or instrument to which the Company 
          or any of the Subsidiaries is a party or 

                                       19



          by which the Company or any of the Subsidiaries or their properties 
          are bound or affected or under any law, regulation or rule or any 
          decree, judgment or order applicable to the Company or any of the 
          Subsidiaries, except for such matters as could not, individually or 
          in the aggregate, have a material adverse effect on the properties, 
          assets, operations, business, business prospects or condition 
          (financial or other) of the Company and the Subsidiaries taken as a 
          whole;

           (xiv)  to the best of such counsel's knowledge, after due inquiry, 
          neither the Company nor any of the Subsidiaries has violated any 
          Environmental Laws, nor any federal or state law relating to 
          discrimination in the hiring, promotion or pay of employees nor any 
          applicable federal or state wages and hours laws, nor any 
          provisions of the Employee Retirement Income Security Act or the 
          rules and regulations promulgated thereunder, which in each case 
          might result in any material adverse effect on the properties, 
          assets, operations, business, business prospects or condition 
          (financial or other) of the Company and the Subsidiaries taken as a 
          whole;

            (xv)  the Company and each of the Subsidiaries has such permits, 
          licenses, franchises and authorizations of governmental or 
          regulatory authorities ("permits"), including without limitation 
          under any applicable Environmental Laws, as are necessary to own, 
          lease and operate its respective properties and to conduct its 
          business in the manner described in the Prospectus; to the best of 
          such counsel's knowledge, after due inquiry, the Company and each 
          of the Subsidiaries has fulfilled and performed all of its material 
          obligations with respect to such permits and no event has occurred 
          which allows, or after notice or lapse of time would allow, 
          revocation or termination thereof or results in any other material 
          impairment of the rights of the holder of any such permit, subject 
          in each case to such qualification as may be set forth in the 
          Prospectus; and, except as described in the Prospectus, such 
          permits contain no restrictions that are materially burdensome to 
          the Company or any of the Subsidiaries;

           (xvi)  all contracts or documents of a character required to be
          described in the Registration Statement or the Prospectus or to be

                                       20



          filed as an exhibit to the Registration Statement have been so 
          described or filed;

          (xvii)  except as described in the Registration Statement and the 
          Prospectus, there are no actions, suits or proceedings of which 
          such counsel has knowledge pending or threatened against the 
          Company or any of the Subsidiaries, or any of their respective 
          properties, at law or in equity, or before or by any federal, 
          state, local or foreign governmental or regulatory commission, 
          board, body, authority or agency that individually or in the 
          aggregate could result in a judgment, decree or order having a 
          material adverse effect on the properties, assets, operations, 
          business, business prospects or condition (financial or other) of 
          the Company and the Subsidiaries taken as a whole;

          (xviii)  the documents incorporated by reference in the 
          Registration Statement and Prospectus, when they were filed (or, if 
          an amendment with respect to any such document was filed, when such 
          amendment was filed), complied as to form in all material respects 
          with the Exchange Act (except as to the financial statements and 
          schedules and other financial and statistical data contained or 
          incorporated by reference therein, as to which such counsel need 
          express no opinion);

           (xix)  to the best of such counsel's knowledge, each person who 
          has the right, contractual or otherwise, to cause the Company to 
          register pursuant to the Act any securities of the Company in 
          consequence of the issue and sale of the Shares to the Underwriters 
          hereunder either included such securities in the Registration 
          Statement or duly waived such right and each person who has the 
          right, contractual or otherwise, to cause the Company to issue to 
          it any securities of the Company in consequence of the issue and 
          sale of the Shares to the Underwriters hereunder has duly waived 
          such right;

            (xx)  the statements in the Registration Statement and the 
          Prospectus under the captions "Business -- Regulatory Matters" and 
          "Risk Factors -- Shares Eligible For Future Sale" and in the 
          Company's Registration Statement on Form 8-A dated July 20, 1998 
          under the caption "Description of Capital Stock," insofar as they 
          are descriptions of laws, regulations and rules, of legal and 

                                       21



          governmental proceedings or of contracts, agreements, leases and 
          other legal documents, or refer to statements of law or legal 
          conclusions, have been reviewed by such counsel and are accurate in 
          all material respects;

           (xxi)  neither the Company nor any of the Subsidiaries is an 
          "investment company" or a person "controlled" by an "investment 
          company" within the meaning of the Investment Company Act of 1940, 
          as amended;

          (xxii)  this Agreement, the Power of Attorney and the Custody 
          Agreement have been duly executed and delivered by each of the 
          Selling Shareholders; the Power of Attorney and the Custody 
          Agreement are legal, valid and binding agreements of each of the 
          Selling Shareholders enforceable in accordance with their 
          respective terms, except as the enforceability thereof may be 
          limited by bankruptcy, insolvency, reorganization, moratorium or 
          similar laws affecting creditors' rights generally and general 
          principles of equity;

         (xxiii)  each of the Selling Shareholders has full legal right and 
          power, and has obtained any authorization or approval required by 
          law (other than those imposed by the Act and the securities or blue 
          sky laws of certain jurisdictions), to sell, assign, transfer and 
          deliver the Shares to be sold by such Selling Shareholder in the 
          manner provided in this Agreement;

          (xxiv)  delivery of certificates for the Shares to be sold by the 
          Selling Shareholders pursuant hereto will pass title thereto to the 
          Underwriters severally, free and clear of any claim, lien, 
          encumbrance, security interest, community property right, 
          restriction on transfer or other defect in title assuming that the 
          several Underwriters are good faith purchasers and without notice 
          of any adverse claim;

           (xxv)  to the best of such counsel's knowledge, the consummation 
          of the transactions contemplated hereby and by the Power of 
          Attorney and the Custody Agreement and the fulfillment of the terms 
          hereof and thereof will not constitute a breach or violation of or 
          default under any trust, indenture, agreement or other instrument 
          to which any of the Selling Shareholders is a party or by which any 
          of the Selling Shareholders is bound;

                                       22



          (xxvi)  the Attorney-in-Fact has been duly authorized by each 
          Selling Shareholder to execute and deliver on behalf of each 
          Selling Shareholder this Agreement and any other document necessary 
          or desirable in connection with the transactions contemplated 
          hereby and to deliver the Shares to be sold by the Selling 
          Shareholders and receive payment therefor pursuant hereto;

         (xxvii)  no approval, authorization, consent or order of or filing 
          with any federal, state, local or foreign governmental or 
          regulatory commission, board, body, authority or agency is required 
          in connection with the sale of the Shares to be sold by the Selling 
          Shareholders as contemplated hereby other than registration of the 
          Shares under the Act (except such counsel need express no opinion 
          as to any necessary qualification under the state securities or 
          blue sky laws of the various jurisdictions in which the Shares are 
          being offered by the Underwriters); and

          (xxviii)  nothing has come to the attention of such counsel that 
          causes them to believe that the Registration Statement or any 
          amendment thereto at the time such Registration Statement or 
          amendment became effective contained an untrue statement of a 
          material fact or omitted to state a material fact required to be 
          stated therein or necessary to make the statements therein not 
          misleading, or that the Prospectus or any supplement thereto at the 
          date of such Prospectus or such supplement, and at all times up to 
          and including the time of purchase contained an untrue statement of 
          a material fact or omitted to state a material fact required to be 
          stated therein or necessary to make the statements therein, in 
          light of the circumstances under which they were made, not 
          misleading (it being understood that such counsel need express no 
          opinion with respect to the financial statements and schedules 
          included in the Registration Statement or Prospectus).

          (b)  You shall have received from Ernst & Young LLP letters dated, 
     respectively, the date of this Agreement and the time of purchase and 
     additional time of purchase, as the case may be, and addressed to the 
     Underwriters (with reproduced copies for each of the Underwriters) in 
     form and substance satisfactory to you.

                                       23



          (c)  You shall have received at the time of purchase and at the 
     additional time of purchase, as the case may be, opinions from Gibson, 
     Dunn & Crutcher LLP in form and substance satisfactory to you.

          (d)  No amendment or supplement to the Registration Statement or the
     Prospectus, including documents deemed to be incorporated by reference
     therein, shall be filed prior to the time the Registration Statement
     becomes effective to which you shall have objected in writing.

          (e)  The Registration Statement shall become effective at or before
     5:00 P.M., New York City time, on the date of this Agreement and, if
     Rule 430A under the Act is used, the Prospectus shall have been filed with
     the Commission pursuant to Rule 424(b) under the Act at or before
     5:00 P.M., New York City time, on the second full business day after the
     date of this Agreement; PROVIDED, HOWEVER, that the Company, the Selling
     Shareholders and you and any group of Underwriters, including you, who have
     agreed hereunder to purchase in the aggregate at least 50% of the Firm
     Shares from time to time may agree in writing or by telephone, confirmed in
     writing, on a later date.

          (f)  Prior to the time of purchase or the additional time of purchase,
     as the case may be:  (i) no stop order with respect to the effectiveness of
     the Registration Statement shall have been issued under the Act or
     proceedings initiated under Section 8(d) or 8(e) of the Act; (ii) the
     Registration Statement and all amendments thereto, or modifications
     thereof, if any, shall not contain an untrue statement of a material fact
     or omit to state a material fact required to be stated therein or necessary
     to make the statements therein not misleading; and (iii) the Prospectus and
     all amendments or supplements thereto, or modifications thereof, if any,
     shall not contain an untrue statement of a material fact or omit to state a
     material fact required to be stated therein or necessary to make the
     statements therein, in light of the circumstances under which they were
     made, not misleading.

          (g)  Between the time of execution of this Agreement and the time of
     purchase or the additional time of purchase, as the case may be, there has
     not been:  (i) any material and adverse change, present or prospective, in
     the properties, assets, operations, business, business prospects or
     condition (financial or other) of the Company and the Subsidiaries taken as
     a 

                                       24



     whole, other than as described in the Registration Statement and the 
     Prospectus; (ii) any transaction that is material to the Company and the 
     Subsidiaries taken as a whole contemplated or entered into by the 
     Company or any of the Subsidiaries, other than as described in the 
     Registration Statement and the Prospectus; or (iii) any obligation, 
     contingent or otherwise, directly or indirectly, incurred by the Company 
     or any of the Subsidiaries that is material to the Company and the 
     Subsidiaries taken as a whole, other than as described in the 
     Registration Statement and the Prospectus.

          (h)  The Company, at the time of purchase or additional time of
     purchase, as the case may be, will deliver to you a certificate of two of
     its executive officers to the effect that the representations and
     warranties of the Company as set forth in this Agreement are true and
     correct as of each such date and the conditions set forth in Section 8(f)
     and Section 8(g) have been met.

          (i)  You shall have received a signed letter, dated the date of this
     Agreement, from each of the shareholders listed in Schedule C to the effect
     that such persons shall not sell, contract to sell, grant any option to
     sell, transfer or otherwise dispose of, directly or indirectly, any shares
     of Common Stock or securities convertible into or exchangeable for Common
     Stock or warrants or other rights to purchase Common Stock for a period of
     90 days from the date of the Prospectus without the prior written consent
     of Warburg Dillon Read LLC.

          (j)  The Company and the Selling Shareholders shall have furnished to
     you such other documents and certificates as to the accuracy and
     completeness of any statement in the Registration Statement or the
     Prospectus as of the time of purchase and the additional time of purchase,
     as the case may be, as you reasonably may request.

          (k)  The Company and the Selling Shareholders shall have performed
     such of their respective obligations under this Agreement as are to be
     performed by the terms hereof at or before the time of purchase and at or
     before the additional time of purchase, as the case may be.

          (l)  The Shares shall have been approved for listing on the New York
     Stock Exchange.

                                       25



          (m)  The Attorney-in-Fact, at the time of purchase or additional time
     of purchase, as the case may be, shall have delivered to you a certificate
     to the effect that the Attorney-in-Fact is not aware that any of the
     representations and warranties of the Selling Shareholders as set forth in
     this Agreement are not true and correct as of such date.

          (n)  On or prior to the date hereof, the New York Stock Exchange shall
     have approved the Underwriters' participation in the distribution of the
     Shares to be sold by the Selling Shareholders.

          9.   EFFECTIVE DATE OF AGREEMENT; TERMINATION.

          (a)  This Agreement shall become effective (i) if Rule 430A under 
the Act is not used, when you shall have received notification of the 
effectiveness of the Registration Statement, or (ii) if Rule 430A under the 
Act is used, when the parties hereto have executed and delivered this 
Agreement.

          (b)  The obligations of the several Underwriters hereunder shall be 
subject to termination in the absolute discretion of you or any group of 
Underwriters (which may include you) which has agreed to purchase in the 
aggregate at least 50% of the Firm Shares if, at any time prior to the time 
of purchase or, with respect to the purchase of any Additional Shares, the 
additional time of purchase, as the case may be, trading in securities on the 
New York Stock Exchange shall have been suspended or minimum prices shall 
have been established on the New York Stock Exchange or if a banking 
moratorium shall have been declared either by the United States or New York 
State authorities, or if the United States shall have declared war in 
accordance with its constitutional processes or there shall have occurred any 
material outbreak or escalation of hostilities or other national or 
international calamity or crisis of such magnitude in its effect on, or any 
material adverse change in, any financial market which, in each case, in your 
judgment or in the judgment of such group of Underwriters, makes it 
impracticable to market the Shares.  If you or any group of Underwriters 
elect to terminate this Agreement as provided in this Section 9(b), the 
Company and each other Underwriter shall be notified promptly by letter or 
telegram.

          (c)  If any Underwriter shall default in its obligation to take up 
and pay for the Firm Shares to be purchased by it hereunder and if the number 
of Firm Shares which all Underwriters so defaulting shall have agreed but 
failed to take up and pay for does not exceed 10% of the 

                                       26



total number of Firm Shares, the non-defaulting Underwriters shall take up 
and pay for (in addition to the aggregate principal amount of Firm Shares 
they are obligated to purchase pursuant to Section 1) the number of Firm 
Shares agreed to be purchased by all such defaulting Underwriters as 
hereinafter provided.  Such Shares shall be taken up and paid for by such 
non-defaulting Underwriter or Underwriters in such amount or amounts as you 
may designate with the consent of each Underwriter so designated or, in the 
event no such designation is made, such Shares shall be taken up and paid for 
by all non-defaulting Underwriters pro rata in proportion to the aggregate 
number of Firm Shares set opposite the names of such non-defaulting 
Underwriters in Schedule A.

          (d)  If any Underwriter shall default in its obligation to take up 
and pay for the Firm Shares to be purchased by it hereunder and if the number 
of Firm Shares which all Underwriters so defaulting shall have agreed but 
failed to take up and pay for exceeds 10% of the total number of Firm Shares, 
and arrangements satisfactory to you and the Company are not made within 48 
hours after such default, this Agreement will terminate without liability on 
the part of any non-defaulting Underwriter.

          (e)  Without relieving any defaulting Underwriter from its 
obligations hereunder, the Company agrees with the non-defaulting 
Underwriters that it will not sell any Firm Shares hereunder unless all of 
the Firm Shares are purchased by the Underwriters (or by substituted 
underwriters selected by you with the approval of the Company or selected by 
the Company with your approval pursuant to Section 9(d)).  If a new 
Underwriter or Underwriters are substituted for a defaulting Underwriter or 
Underwriters in accordance with Section 9(d), the Company or you shall have 
the right to postpone the time of purchase for a period not exceeding five 
business days in order that any necessary change in the Registration 
Statement and the Prospectus and other documents may be effected.  The term 
Underwriter as used in this Agreement shall refer to and include any 
Underwriter substituted under this Section 9 with like effect as if such 
substituted Underwriter had originally been named in Schedule A.

          (f)  If the purchase of the Shares by the Underwriters, as 
contemplated by this Agreement, is not consummated for any reason permitted 
under this Agreement or if such purchase is not consummated because the 
Company shall be unable to comply with any of the terms of this Agreement, 
the Company shall not be under any obligation or liability under this 
Agreement (except to the extent provided in Sections 5(l), 7 and 10), and the 
Underwriters 

                                       27



shall be under no obligation or liability to the Company under this Agreement 
(except to the extent provided in Section 10).

          10.  INDEMNITY BY THE COMPANY, THE SELLING SHAREHOLDERS AND THE 
UNDERWRITERS.

          (a)  The Company and the Selling Shareholders, jointly and 
severally, agree to indemnify, defend and hold harmless each Underwriter, 
each person that controls any Underwriter within the meaning of Section 15 of 
the Act or Section 20 of the Exchange Act, and each Underwriter's agents, 
employees, officers and directors and the agents, employees, officers and 
directors of any such controlling person (collectively, the "Underwriter 
indemnified parties") from and against any and all losses, claims, damages, 
judgments, liabilities and expenses (including the fees and expenses of 
counsel and other expenses in connection with investigating, defending or 
settling any such action or claim) which, jointly or severally, any 
Underwriter indemnified party may incur as they are incurred (and regardless 
of whether such Underwriter indemnified party is a party to the litigation, 
if any) arising out of or based upon any untrue statement or alleged untrue 
statement of a material fact contained in the registration statement relating 
to the Shares or the Prospectus or any Preliminary Prospectus, or arising out 
of or based upon any omission or alleged omission to state therein a material 
fact required to be stated therein or necessary to make the statements 
therein not misleading, except insofar as such losses, claims, damages, 
judgments, liabilities or expenses arise out of, or are based upon, any such 
untrue statement or omission or alleged untrue statement or omission based 
upon and in conformity with information with respect to any Underwriter 
furnished in writing by any Underwriter through you to the Company expressly 
for use therein with reference to such Underwriter; PROVIDED, HOWEVER, that 
no Selling Shareholder shall be liable under this Section 11 in an amount 
exceeding the total price at which the Shares sold by such Selling 
Shareholder were offered to the public.  This indemnity agreement will be in 
addition to any liability the Company or the Selling Shareholders otherwise 
may have.

          (b)  If any action or proceeding (including any governmental or 
regulatory investigation or proceeding) shall be brought or asserted against 
any Underwriter indemnified party, with respect to which indemnity may be 
sought against the Company or a Selling Shareholder pursuant to this Section 
10, such Underwriter indemnified party shall promptly notify the Company and 
each Selling Shareholder in writing, and the Company and the Selling 
Shareholders shall assume the defense thereof, including the employment of 

                                       28



counsel reasonably satisfactory to the Underwriter indemnified party and 
payment of all fees and expenses; PROVIDED that the omission so to notify the 
Company and the Selling Shareholders shall not relieve them from any 
liability that they may have to any Underwriter indemnified party.  An 
Underwriter indemnified party shall have the right to employ separate counsel 
in any such action or proceeding and to assume the defense thereof, but the 
fees and expenses of such counsel shall be at the expense of such Underwriter 
indemnified party unless (i) the employment of such counsel has been 
authorized in writing by the Company or the Selling Shareholders, (ii) the 
Company and the Selling Shareholders have failed promptly to assume the 
defense and employ counsel satisfactory to the Underwriter indemnified party 
or (iii) the named parties to any such action or proceeding (including any 
impleaded parties) include both the Underwriter indemnified party and the 
Company or the Selling Shareholders and such Underwriter indemnified party 
shall have reasonably concluded that there may be one or more legal defenses 
available to it that are different from or additional to those available to 
the Company and the Selling Shareholders (in which case the Company and the 
Selling Shareholders shall not have the right to assume the defense of such 
action on behalf of such Underwriter indemnified party), in any of which 
events such fees and expenses shall be borne by the Company and the Selling 
Shareholders and reimbursed as they are incurred.  It is understood, however, 
that the Company and the Selling Shareholders shall not, in connection with 
any one such action or separate but substantially similar or related actions 
in the same jurisdiction arising out of the same general allegations or 
circumstances, be liable for the fees and expenses of more than one separate 
firm of attorneys (in addition to any local counsel) at any time for all such 
Underwriter indemnified parties, which firm shall be designated in writing by 
Warburg Dillon Read LLC, and that all such fees and expenses shall be 
reimbursed as they are incurred.  The Company and the Selling Shareholders 
shall not be liable for any settlement of any such action effected without 
the written consent of the Company or the Selling Shareholders (which consent 
shall not be unreasonably withheld or delayed), but if settled with the 
written consent of the Company or the Selling Shareholders], or if there is a 
final judgment with respect thereto, the Company and the Selling Shareholders 
agree to indemnify and hold harmless each Underwriter indemnified party from 
and against any loss or liability by reason of such settlement or judgment.

          (c)  Each Underwriter severally agrees to indemnify and hold 
harmless the Company, its directors, its officers who sign the Registration 
Statement, and any person 

                                       29



that controls the Company within the meaning of Section 15 of the Act or 
Section 20 of the Exchange Act (collectively, the "Company indemnified 
parties") and each Selling Shareholder to the same extent as the foregoing 
indemnity from the Company and the Selling Shareholders to the Underwriter 
indemnified parties, but only with respect to information concerning such 
Underwriter furnished in writing by or on behalf of such Underwriter through 
you to the Company expressly for use with respect to such Underwriter in the 
Registration Statement, any Preliminary Prospectus or the Prospectus.  In 
case any action shall be brought against any Company indemnified party or any 
Selling Shareholder based on the Registration Statement, any Preliminary 
Prospectus or the Prospectus and in respect of which indemnity may be sought 
against any Underwriter pursuant to this Section 10(c), such Underwriter 
shall have the rights and duties given to the Company and the Selling 
Shareholders by Section 10(b) (except that if the Company and the Selling 
Shareholders shall have assumed the defense thereof such Underwriter shall 
not be required to do so, but may employ separate counsel therein and 
participate in the defense thereof, PROVIDED that the fees and expenses of 
such separate counsel shall be at the expense of such Underwriter), and the 
Company indemnified parties and the Selling Shareholders shall have the 
rights and duties given to the Underwriter indemnified parties by Section 
10(b).

          (d)  If the indemnification provided for in this Section 10 is 
unavailable to or insufficient to hold harmless any Underwriter indemnified 
party or any Company indemnified party or any Selling Shareholder, then the 
party required to indemnify such indemnified party under this Section 10, in 
lieu of indemnifying such indemnified party, shall contribute to the amount 
paid or payable by such indemnified party as a result of such losses, claims, 
damages, judgments, liabilities and expenses (i) in such proportion as is 
appropriate to reflect the relative benefits received by the Company and the 
Selling Shareholders on the one hand and the Underwriters on the other hand 
from the offering of the Shares, or (ii) if the allocation provided by clause 
(i) above is not permitted by applicable law, in such proportion as is 
appropriate to reflect not only the relative benefits referred to in clause 
(i) above but also the relative fault of the Company and the Selling 
Shareholders on the one hand and the Underwriters on the other hand in 
connection with the statements or omissions which resulted in such losses, 
claims, damages, liabilities or expenses, as well as any other relevant 
equitable considerations.  The relative benefits received by the Company and 
the Selling Shareholders on the one hand and the Underwriters on the other 
hand shall be deemed to be in the same proportion as 

                                       30



the total proceeds from the offering (net of underwriting discounts and 
commissions but before deducting expenses) received by the Company and the 
Selling Shareholders bear to the total underwriting discounts and commissions 
received by the Underwriters, in each case as set forth in the table on the 
cover page of the Prospectus.  The relative fault of the Company and the 
Selling Shareholders on the one hand and the Underwriters on the other hand 
shall be determined by reference to, among other things, whether the untrue 
statement or alleged untrue statement of a material fact or the omission or 
alleged omission to state a material fact relates to information supplied by 
the Company, by the Selling Shareholders or by the Underwriters, and the 
parties' relative intent, knowledge, access to information and opportunity to 
correct or prevent such statement or omission.  The amount paid or payable by 
a party as a result of the losses, claims, damages, judgments, liabilities 
and expenses referred to above shall be deemed to include any legal or other 
fees or expenses reasonably incurred by such party in connection with 
investigating or defending any claim or action.

          The Company, the Selling Shareholders and the Underwriters agree 
that it would not be just and equitable if contribution pursuant to this 
Section 10(d) were determined by pro rata allocation or by any other method 
of allocation (even if the Underwriters were treated as one entity for such 
purpose) that does not take account of the equitable considerations referred 
to in this Section 10(d).  Notwithstanding the provisions of this Section 
10(d), no Underwriter indemnified party shall be required to contribute any 
amount in excess of the amount by which the total price at which the Shares 
underwritten by such Underwriter indemnified party and distributed to the 
public were offered to the public exceeds the amount of any damages which 
such Underwriter indemnified party otherwise has been required to pay by 
reason of such untrue statement or alleged untrue statement or omission or 
alleged omission.  No person guilty of fraudulent misrepresentation (within 
the meaning of Section 11(f) of the Act) shall be entitled to contribution 
from any person who was not guilty of such fraudulent misrepresentation.  The 
Underwriters' obligations to contribute pursuant to this Section 10 are 
several in proportion to their respective underwriting commitments and are 
not joint.

          The statements under the caption "Underwriting" in the Prospectus 
(to the extent such statements relate to an Underwriter) constitute the only 
information furnished to the Company in writing by such Underwriter expressly 
for use in the Registration Statement, any Preliminary Prospectus or the 
Prospectus.

                                       31



          (e)  The indemnity and contribution agreements contained in this 
Section 10 and the representations, warranties and covenants of the Company 
and the Selling Shareholders contained in this Agreement shall remain in full 
force and effect, regardless of any investigation made by or on behalf of any 
Underwriter indemnified party or by or on behalf of any Company indemnified 
party or any Selling Shareholder, and shall survive any termination of this 
Agreement or the issuance and delivery of the Shares.  Subject to the 
provisions of Section 10(b) and Section 10(c), the Company, each Selling 
Shareholder and each Underwriter agree promptly to notify the other of the 
commencement of any litigation or proceeding against it in connection with 
the issuance and sale of the Shares or in connection with the Registration 
Statement or the Prospectus.

          11.  NOTICES.  Except as otherwise herein provided, all statements, 
requests, notices and agreements shall be in writing or by telegram and, if 
to the Underwriters, shall be sufficient in all respects if delivered or sent 
to Warburg Dillon Read LLC, 535 Madison Avenue, New York, New York 10022, 
Attention:  Syndicate Department; if to the Company, shall be sufficient in 
all respects if delivered or sent to the Company at the offices of the 
Company at 7301 Fairview, Houston, Texas, 77041, Attention: ____________; and 
if to the Selling Shareholders, shall be sufficient in all respects, if 
delivered or sent to ____________.

          12.  CONSTRUCTION.  THIS AGREEMENT SHALL BE GOVERNED BY, AND 
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT 
REGARD TO PRINCIPLES OF CONFLICTS OF LAW.  THE SECTION HEADINGS IN THIS 
AGREEMENT HAVE BEEN INSERTED AS A MATTER OF CONVENIENCE OF REFERENCE AND ARE 
NOT A PART OF THIS AGREEMENT.

          13.  PARTIES AT INTEREST.  The Agreement herein set forth has been 
and is made solely for the benefit of the Underwriters, the Company, the 
Selling Shareholders, the Underwriter indemnified parties and the Company 
indemnified parties, and their respective successors, assigns, executors and 
administrators. No other person, partnership, association or corporation 
(including a purchaser, as such purchaser, from any of the Underwriters) 
shall acquire or have any right under or by virtue of this Agreement.

          14.  COUNTERPARTS.  This Agreement may be signed by the parties in 
counterparts which together shall constitute one and the same agreement among 
the parties.

                                       32



          If the foregoing correctly sets forth the understanding among the 
Company, the Selling Shareholders and the Underwriters, please so indicate in 
the space provided below for such purpose, whereupon this letter and your 
acceptance shall constitute a binding agreement among the Company, the 
Selling Shareholders and the Underwriters, severally.


                                       Very truly yours,

                                       NCI BUILDING SYSTEMS, INC.

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

                                       THE SELLING SHAREHOLDERS NAMED 
                                         IN SCHEDULE B ATTACHED HERETO


                                       By: 
                                          -------------------------------------
                                            Attorney-in-fact

Accepted and agreed to as of
the date first above written,
on behalf of themselves,
J.C. Bradford & Co.,
Wheat First Union, Dain
Rauscher Wessels
and the other several
Underwriters named in
Schedule A

WARBURG DILLON READ LLC, as

  Managing Underwriter

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

                                       33



                                     SCHEDULE A


                                                  Number of 
Underwriter                                      Firm Shares
- -----------                                      -----------
                                              
Warburg Dillon Read LLC . . . . . . . . . . .              
J.C. Bradford & Co. . . . . . . . . . . . . .              
Wheat First Union . . . . . . . . . . . . . .              
Dain Rauscher Wessels . . . . . . . . . . . .              




                                                 ----------
Total          
                                                 ----------
                                                 ----------




                                     SCHEDULE B



                                                     Number of Firm 
Name                                               Shares to be Sold
- ----                                               -----------------
                                                





                                     SCHEDULE C

                 SHAREHOLDERS WHO HAVE EXECUTED LOCK-UP AGREEMENTS