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
October 2, 2005 as filed with the Securities and Exchange Commission on the date
hereof (the "Report"), Samuel J. Heyman, as Chief Executive Officer of the
Company, and John F. Rebele, as Senior Vice President, Chief Financial Officer
and Chief Administrative 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/ Samuel J. Heyman
- ------------------------------------
Name:  Samuel J. Heyman
Title: Chief Executive Officer

Date:  November 16, 2005


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

Date:  November 16, 2005

           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.