About product and suppliers:
            6,065 roofing and drainage products are offered for sale by suppliers on Alibaba.com, of which other plastic building materials accounts for 13%, waterproof membrane accounts for 7%, and metal building materials accounts for 6%. 

A wide variety of roofing and drainage options are available to you, such as galvanized, coated. You can also choose from stainless steel, steel, and plastic roofing and drainage

There are 6,156 suppliers who sells roofing and drainage on Alibaba.com, mainly located in Asia. The top countries of suppliers are China, India, and Vietnam, from which the percentage of roofing and drainage supply is 99%, 1%, and 1% respectively. 

Roofing and drainage products are most popular in United States, India, and Nigeria.