SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 10-Q/A
                                 AMENDMENT NO. 1

                  QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

FOR THE QUARTER ENDED:  February 1, 2003
                        ----------------

COMMISSION FILE NUMBER:  1-14315
                         -------

                           NCI BUILDING SYSTEMS, INC.
              ----------------------------------------------------
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)


           Delaware                                         76-0127701
 ------------------------------                           ---------------
(STATE OR OTHER JURISDICTION OF                          (I.R.S. EMPLOYER
 INCORPORATION OR ORGANIZATION)                          IDENTIFICATION NO.)


     10943 N. Sam Houston Parkway W.
              Houston, TX                                      77064
 --------------------------------------                       --------
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                     (ZIP CODE)


                                 (281) 897-7788
               --------------------------------------------------
               REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE


               --------------------------------------------------
               FORMER NAME, FORMER ADDRESS AND FORMER FISCAL YEAR,
                         IF CHANGED SINCE LAST REPORT.

     INDICATE BY CHECK MARK WHETHER THE REGISTRANT (1) HAS FILED ALL REPORTS
     REQUIRED TO BE FILED BY SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT
     OF 1934 DURING THE PRECEDING 12 MONTHS (OR FOR SUCH SHORTER PERIODS THAT
     THE REGISTRANT WAS REQUIRED TO FILE SUCH REPORTS), AND (2) HAS BEEN SUBJECT
     TO SUCH FILING REQUIREMENTS FOR THE PAST 90 DAYS. YES  X   NO
                                                          ----    ----

                      APPLICABLE ONLY TO CORPORATE ISSUERS

     INDICATE THE NUMBER OF SHARES OUTSTANDING OF EACH OF THE ISSUER'S CLASSES
     OF COMMON STOCK, AS OF THE LATEST PRACTICAL DATE.

Common Stock, $.01 Par Value--18,731,108 shares as of February 1, 2003
----------------------------------------------------------------------






                                EXPLANATORY NOTE


                  This Amendment on Form 10-Q/A constitutes Amendment No. 1 to
         the Quarterly Report on Form 10-Q for the fiscal quarter ended February
         1, 2003, which was previously filed with the Securities and Exchange
         Commission on March 18, 2003 (the "Quarterly Report"), of NCI Building
         Systems, Inc. We are filing this Amendment to add the disclosure set
         forth in Part I, Item 4. We are also amending the Quarterly Report to
         include as Exhibits the certifications required by Section 906 of the
         Sarbanes-Oxley Act of 2002 in accordance with the interim guidance
         provided by the Securities and Exchange Commission.

                  This Amendment amends only the items of the Quarterly Report
         specified above and amends those items solely to reflect the changes
         described above. This Amendment does not otherwise update the
         disclosures in the Quarterly Report as originally filed and does not
         reflect events occurring after the original filing of the Quarterly
         Report on March 18, 2003.



                                TABLE OF CONTENTS


                         PART I - FINANCIAL INFORMATION


                                                                                                                Page
                                                                                                                ----

                                                                                                            
       Item 4.    Controls and Procedures.........................................................................1



                           PART II - OTHER INFORMATION


                                                                                                                Page
                                                                                                                ----

                                                                                                            

       Item 6.    Exhibits and Reports on Form 8-K................................................................1

       SIGNATURES AND CERTIFICATIONS............................................................................2-5



                           FORWARD LOOKING STATEMENTS

"This Quarterly Report contains forward-looking statements concerning our
business and operations. Although we believe that the expectations reflected in
the forward-looking statements are reasonable, these expectations and the
related statements are subject to risks, uncertainties, and other factors that
could cause the actual results to differ materially from those projected. These
risks, uncertainties, and other factors include, but are not limited to,
industry cyclicality and seasonality, adverse weather conditions, fluctuations
in customer demand and other patterns, raw material pricing, competitive
activity and pricing pressure, the ability to make strategic acquisitions
accretive to earnings, and general economic conditions affecting the
construction industry, as well as other risks detailed in our filings with the
SEC. We expressly disclaim any obligations to release publicly any updates or
revisions to these forward-looking statements to reflect any changes in our
expectations."


                                      -i-



                           NCI BUILDING SYSTEMS, INC.

                         PART I - FINANCIAL INFORMATION


ITEM 4.  CONTROLS AND PROCEDURES

              Within 90 days before the date of this report, we carried out an
       evaluation, under the supervision and with the participation of our
       principal executive officer and principal financial officer, of the
       effectiveness of the design and operation of our disclosure controls and
       procedures. Based on this evaluation, our principal executive officer and
       principal financial officer concluded that our disclosure controls and
       procedures are effective in timely alerting them to material information
       required to be included in our periodic SEC reports.

              Disclosure controls and procedures are controls and other
       procedures that are designed to ensure that information required to be
       disclosed in our reports filed or submitted under the Securities and
       Exchange Act of 1934 is recorded, processed, summarized and reported,
       within the time periods specified in the SEC's rules and forms.
       Disclosure controls and procedures include, without limitation, controls
       and procedures designed to ensure that information required to be
       disclosed in our reports filed under the Exchange Act is accumulated and
       communicated to management, including our principal executive officer and
       principal financial officer as appropriate, to allow timely decisions
       regarding required disclosure.

              In addition, we reviewed our internal controls, and there have
       been no significant changes in our internal controls or in other factors
       that could significantly affect those controls subsequent to the date of
       their last evaluation.


                           PART II - OTHER INFORMATION

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

(a)      Exhibits

            99.1  Certifications pursuant to Section 1350 of Chapter 63 of Title
                  18 of the United States Code (Section 906 of the
                  Sarbanes-Oxley Act of 2002)

            99.2  Certifications pursuant to Section 1350 of Chapter 63 of Title
                  18 of the United States Code (Section 906 of the
                  Sarbanes-Oxley Act of 2002)

            99.3  Certifications pursuant to Section 1350 of Chapter 63 of Title
                  18 of the United States Code (Section 906 of the
                  Sarbanes-Oxley Act of 2002)

(b)      Reports on Form 8-K

            None



                                     - 1 -




                                   SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                               NCI BUILDING SYSTEMS, INC.
                               --------------------------
                               (Registrant)


Date:   May 16, 2003           By:  /s/ Robert J. Medlock
                                    --------------------------------------------
                                    Robert J. Medlock
                                    Executive Vice President and Chief
                                    Financial Officer





                                     - 2 -



                    CERTIFICATION PURSUANT TO RULE 13a-14(b)


I, A. R. Ginn, certify that:

         1. I have reviewed this quarterly report on Form 10-Q/A of NCI Building
Systems, Inc.;

         2. Based on my knowledge, this quarterly report does not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
quarterly report;

         3. Based on my knowledge, the financial statements, and other financial
information included in this quarterly report, fairly present in all material
respects the financial condition, results of operations and cash flows of the
registrant as of, and for, the periods presented in this quarterly report;

         4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:

                  (a) designed such disclosure controls and procedures to ensure
         that material information relating to the registrant, including its
         consolidated subsidiaries, is made known to us by others within those
         entities, particularly during the period in which this quarterly report
         is being prepared;

                  (b) evaluated the effectiveness of the registrant's disclosure
         controls and procedures as of a date within 90 days prior to the filing
         date of this quarterly report (the "Evaluation Date"); and

                  (c) presented in this quarterly report our conclusions about
         the effectiveness of the disclosure controls and procedures based on
         our evaluation as of the Evaluation Date;

         5. The registrant's other certifying officers and I have disclosed,
based on our most recent evaluation, to the registrant's auditors and the audit
committee of registrant's board of directors (or persons performing the
equivalent function):

                  (a) all significant deficiencies in the design or operation of
         internal controls which could adversely affect the registrant's ability
         to record, process, summarize and report financial data and have
         identified for the registrant's auditors any material weaknesses in
         internal controls; and

                  (b) any fraud, whether or not material, that involves
         management or other employees who have a significant role in the
         registrant's internal controls; and

         6. The registrant's other certifying officers and I have indicated in
this quarterly report whether or not there were significant changes in internal
controls or in other factors that could significantly affect internal controls
subsequent to the date of our most recent evaluation, including any corrective
actions with regard to significant deficiencies and material weaknesses.

Date:  May 16, 2003

                                   /s/ A.R. Ginn
                                   ---------------------------------------------
                                   A. R. Ginn
                                   Chairman of the Board



                                     - 3 -



                    CERTIFICATION PURSUANT TO RULE 13a-14(b)


I, Johnie Schulte, Jr., certify that:

         1. I have reviewed this quarterly report on Form 10-Q/A of NCI Building
Systems, Inc.;

         2. Based on my knowledge, this quarterly report does not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
quarterly report;

         3. Based on my knowledge, the financial statements, and other financial
information included in this quarterly report, fairly present in all material
respects the financial condition, results of operations and cash flows of the
registrant as of, and for, the periods presented in this quarterly report;

         4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:

                  (a) designed such disclosure controls and procedures to ensure
         that material information relating to the registrant, including its
         consolidated subsidiaries, is made known to us by others within those
         entities, particularly during the period in which this quarterly report
         is being prepared;

                  (b) evaluated the effectiveness of the registrant's disclosure
         controls and procedures as of a date within 90 days prior to the filing
         date of this quarterly report (the "Evaluation Date"); and

                  (c) presented in this quarterly report our conclusions about
         the effectiveness of the disclosure controls and procedures based on
         our evaluation as of the Evaluation Date;

         5. The registrant's other certifying officers and I have disclosed,
based on our most recent evaluation, to the registrant's auditors and the audit
committee of registrant's board of directors (or persons performing the
equivalent function):

                  (a) all significant deficiencies in the design or operation of
         internal controls which could adversely affect the registrant's ability
         to record, process, summarize and report financial data and have
         identified for the registrant's auditors any material weaknesses in
         internal controls; and

                  (b) any fraud, whether or not material, that involves
         management or other employees who have a significant role in the
         registrant's internal controls; and

         6. The registrant's other certifying officers and I have indicated in
this quarterly report whether or not there were significant changes in internal
controls or in other factors that could significantly affect internal controls
subsequent to the date of our most recent evaluation, including any corrective
actions with regard to significant deficiencies and material weaknesses.

Date:  May 16, 2003

                                         /s/ Johnie Schulte, Jr.
                                         ---------------------------------------
                                         Johnie Schulte, Jr.
                                         President and Chief Executive Officer



                                     - 4 -



                    CERTIFICATION PURSUANT TO RULE 13a-14(b)


I, Robert J. Medlock, certify that:

         1. I have reviewed this quarterly report on Form 10-Q/A of NCI Building
Systems, Inc.;

         2. Based on my knowledge, this quarterly report does not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
quarterly report;

         3. Based on my knowledge, the financial statements, and other financial
information included in this quarterly report, fairly present in all material
respects the financial condition, results of operations and cash flows of the
registrant as of, and for, the periods presented in this quarterly report;

         4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:

                  (a) designed such disclosure controls and procedures to ensure
         that material information relating to the registrant, including its
         consolidated subsidiaries, is made known to us by others within those
         entities, particularly during the period in which this quarterly report
         is being prepared;

                  (b) evaluated the effectiveness of the registrant's disclosure
         controls and procedures as of a date within 90 days prior to the filing
         date of this quarterly report (the "Evaluation Date"); and

                  (c) presented in this quarterly report our conclusions about
         the effectiveness of the disclosure controls and procedures based on
         our evaluation as of the Evaluation Date;

         5. The registrant's other certifying officers and I have disclosed,
based on our most recent evaluation, to the registrant's auditors and the audit
committee of registrant's board of directors (or persons performing the
equivalent function):

                  (a) all significant deficiencies in the design or operation of
         internal controls which could adversely affect the registrant's ability
         to record, process, summarize and report financial data and have
         identified for the registrant's auditors any material weaknesses in
         internal controls; and

                  (b) any fraud, whether or not material, that involves
         management or other employees who have a significant role in the
         registrant's internal controls; and

         6. The registrant's other certifying officers and I have indicated in
this quarterly report whether or not there were significant changes in internal
controls or in other factors that could significantly affect internal controls
subsequent to the date of our most recent evaluation, including any corrective
actions with regard to significant deficiencies and material weaknesses.

Date:  May 16, 2003

                                /s/ Robert J. Medlock
                                ------------------------------------------------
                                Robert J. Medlock
                                Executive Vice President and Chief
                                Financial Officer



                                     - 5 -




                                INDEX TO EXHIBITS

         99.1     Certifications pursuant to Section 1350 of Chapter 63 of Title
                  18 of the United States Code (Section 906 of the
                  Sarbanes-Oxley Act of 2002)

         99.2     Certifications pursuant to Section 1350 of Chapter 63 of Title
                  18 of the United States Code (Section 906 of the
                  Sarbanes-Oxley Act of 2002)

         99.3     Certifications pursuant to Section 1350 of Chapter 63 of Title
                  18 of the United States Code (Section 906 of the
                  Sarbanes-Oxley Act of 2002)