A WATERTIGHT COMPOSITE SUPPORT FOR BITUMINOUS MEMBRANES WITH LIMITED THICKNESS AND WEIGHT AND A PROCESS FOR THE PRODUCTION THEREOF

摘要

There is described a composite product (10) including two layers (1) and (2) of polyester non- woven fabric which is preferably reinforced, and a thin membrane (3) of polymer material, which is watertight, resistant to high temperatures and arranged between the above said layers of non- woven fabric. The product is adapted to be used as a support for bituminous membranes having a low thickness and weight, as it is intrinsically watertight.