Exhibit 99.1



                    Certification of CEO and CFO Pursuant to
                             18 U.S.C. Section 1350,
                             as Adopted Pursuant to
                  Section 906 of the Sarbanes-Oxley Act of 2002



         In connection with the Quarterly Report on Form 10-Q of Building
Materials Corporation of America (the "Company") for the quarterly period ended
June 30, 2002 as filed with the Securities and Exchange Commission on the date
hereof (the "Report"), William W. Collins, as Chief Executive Officer and
President of the Company, and John F. Rebele, as Senior Vice President and Chief
Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002, that to the best of my knowledge and belief:

                  (1)      The Report fully complies with the requirements of
                           Section 13(a) or 15(d) of the Securities Exchange Act
                           of 1934; and

                  (2)      The information contained in the Report fairly
                           presents, in all material respects, the financial
                           condition and results of operations of the Company.




         /s/ William W. Collins-
- -------------------------------
Name:  William W. Collins
Title: Chief Executive Officer and President

Date:  August 14, 2002




         /s/ John F. Rebele
- -------------------------------
Name:    John F. Rebele
Title:   Senior Vice President and
         Chief Financial Officer

Date:    August 14, 2002


This certification accompanies the Report pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the
Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of
Section 18 of the Securities Exchange Act of 1934, as amended.







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