The first ethylene propylene diene monomer (EPDM) roofing from Firestone, RubberGard EPDM, was installed in West Bend, Wisconsin, in 1980. At the time, said sales rep Clay Van Gomple, no one really knew how long an EPDM roof would last. But, he added, Firestone researchers were sure they had the right formulation. Turns out they were right. A manufacturing plant Firestone opened in Prescott, Arkansas, in 1983 is now the largest EPDM facility in the world, and the company has since added more than a dozen other plants that make EPDM, modified bitumen, thermoplastic membranes and polyiso insulation. Since 1980, Firestone says it has installed roughly 6.5 billion square feet of its RubberGard EPDM globally--the equivalent of about 149,000 acres or 233 square miles. Firestone says RubberGard EPDM can last as long as 50 years.

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