EXHIBIT 99.1



                            CERTIFICATION PURSUANT TO
                      SECTION 906 OF THE SARBANES-OXLEY ACT


I, A. R. Ginn, certify that:

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

         2.       This quarterly report fully complies with the requirements of
                  section 13(a) or 15(d) of the Securities Exchange Act of 1934;
                  and

         3.       The information contained in this quarterly report fairly
                  presents, in all material respects, the financial condition
                  and results of operations of NCI Building Systems, Inc.

Date:  May 16, 2003

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


A signed original of this written statement required by Section 906 has been
provided to NCI Building Systems, Inc. and will be retained by NCI Building
Systems, Inc. and furnished to the Securities and Exchange Commission or its
staff upon request.

This Certification shall not be deemed to be "filed" or part of the Report or
incorporated by reference into any of the registrant's filings with the
Securities and Exchange Commission by implication or by any reference in any
such filing to the Report.