Due to inflexibility, weathering and failing joints, sooner or later conventional flat roofing methods will leak. If you have been struggling with a flat roof leak, or you have a flat or gently sloping roof project, you'll be excited to discover Thermoplastic roofing. The most common flat roofing material used in Central Ohio is EPDM. EPDM is a cost driven product that fails at the seams. Thermoplastic roofing has welded seams and becomes a monolithic “seamless” flat roof. With millions of square feet installed, Thermoplastic roofing has been proven to give many years of leak free service.