Exhibit 32.1


                    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
September 28, 2003 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 his 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:  November 11, 2003



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

Date:  November 11, 2003


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.