Backed by the quality and research of Firestone Building Products, GenFlex Roofing Systems is a leading, full-line supplier o ... f high quality single-ply roofing products for the commercial roofing market. Our products have a strong history. Roofing has long defined who we are and what we do. With over 30 years in the single-ply industry, we bring native expertise to every product, system and accessory we offer. Headquartered in Nashville, Tennessee, we manufacture, market, and sell our products through our network of distributors and authorized roofing contractors. read more