Hangzhou Singer Building Material Co., Ltd. was built in 2006. We are a main producer and supplier of asphalt shingles, rain gutters and waterproofing materials in Hangzhou, China.Our factory covered about 4000 square meters, we have 5 inspection people to control the quality of the goods. We have 5 kinds of shingles with 14 colors for your choose. We use the best materials to produce our shingles without fakery. The warranty time of laminate shingles is 30 years.