Exhibit 99.1

                            CERTIFICATION 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 Annual Report on Form 10-K of Drew Industries
Incorporated (the "Company") for the period ended December 31, 2002, as filed
with the Securities and Exchange Commission on the date hereof (the "Report"),
Leigh J. Abrams, as Chief Executive Officer of the Company, and Fredric M. Zinn,
as 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:

      (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.

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

/s/ Leigh J. Abrams
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Leigh J. Abrams
Chief Executive Officer
March 26, 2003

/s/ Fredric M. Zinn
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Fredric M. Zinn
Chief Financial Officer
March 26, 2003