Suzhou, Hangzhou million toward asphalt shingles manufacturers of building materials Co., Ltd. Contact: Mr. Zhang Tel: 18758129303 Hangzhou million toward the building materials Co. and production, marketing, construction and one of the manufacturer, the company specializing in the production of asphalt shingles, shingles, metal tile , and other building materials, and now the market was mixed, price varies, select become a major problem, Wan commitment towards building materials warranty of 30 years, quality and security, asphalt shingles, we have two more professional standard ASTM International standards applicable to Current US asphalt shingle products: ASTMD225 "mineral aggregate surface asphalt shingles (Organic Felt) technical conditions" and ASTM D3462 "mineral aggregate surface asphalt shingle (fiberglass tire) technical conditions." This standard specifies two asphalt shingles minimum and maximum quality, physical properties and the use of function, and for the International Building Code and NFPA 5000 "construction and safety norms" adopted as minimum requirements for asphalt shingles.