Exhibit 32(a)

                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

      I, Michael P. DiMino, President and Chief Executive Officer of LESCO, Inc.
(the "Company"), certify, pursuant to 18 U.S.C. Section 1350, that:

      (1)   The Quarterly Report on Form 10-Q of the Company for the quarter
            ended September 30, 2004 which this certification accompanies 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 such Quarterly Report fairly presents,
            in all material respects, the financial condition and results of
            operations of the Company.

/s/ Michael P. DiMino
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Michael P. DiMino
President and Chief Executive Officer

Date: November 3, 2004