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About product and suppliers:
        Alibaba.com offers 51,522 double roof products. About 9% of these are roof tiles, 6% are trade show tent, and 1% are waterproof membrane. 

A wide variety of double roof options are available to you, such as plain roof tiles, double roman tiles, and s tiles. You can also choose from synthetic resin, galvanized sheet, and stainless steel. As well as from aisi, astm. And whether double roof is cold rolled, or hot rolled. 

There are 51,522 double roof suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of double roof respectively. 

Double roof products are most popular in Africa, Domestic Market, and North America. 

You can ensure product safety by selecting from certified suppliers, including 15,608 with ISO9001, 5,048 with Other, and 3,785 with ISO14001 certification.