Exhibit 99.1




    CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


        I, Michael P. DiMino, President and Chief Executive Officer, of LESCO,
Inc. (the "Company"), certify, pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002, that:

        (1)     The Quarterly Report on Form 10-Q of the Company for the period
                ended June 30, 2002 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 the 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

August 9, 2002