Nearly 20 years ago, Western Single Ply introduced the Western states to a new type of roofing material that was meant to revolutionize the commercial roofing industry. California, Nevada and other parts of the West are thriving single-ply markets, which in part is due to the pioneering efforts of Western Single Ply. The company offers metal roofing, single-ply roofing, sheet metal flashings, roof maintenance, waterproofing, tile roofing, roof coatings, composition shingles and traffic coatings. Headquartered in Loomis, Calif., Western Single Ply has offices in Fullerton, Calif.; Sparks, Nev.; Las Vegas; Phoenix; and St. George, Utah.