Paving waterproofing membrane lap width of not less than 100mm. Even the roof exposed, exposure to the sun is not a problem, because the waterproofing membrane on top of the protective layer is to be done, polypropylene insulation Which cheaper, rather than direct it waterproof layer is disposed in the open air; China said polypropylene PP Which is good, isotactic polypropylene as raw material obtained by spinning synthetic fibers, is the lightest chemical fiber varieties; strength of 35 ~ 62cN / dtex; wear resistance second only polyamide fibers; good corrosion resistance, especially Which is better _ inorganic acid polypropylene waterproof Shouguang Tianxiang (certified) _ Taiwan's first polypropylene provided by Shouguang City Tianxiang waterproof material plant. Shouguang City Tianxiang waterproof material plant (www.txfscl.com) Shandong Weifang, waterproof, moisture-proof material leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shouguang Tianxiang waterproof leadership with the staff warmly welcome all inquiries negotiations to create Shouguang Tianxiang waterproof better future.