The Corotop® Metal roof membrane is a three-layer product with high vapour permeability combined with PP draining mesh destined for flat steel roof covering. It enables the drainage of the vapured water condensation (at back side of roof covering). The basement of this product is extremely high vapour roof membrane with increased strength parameters. The product has high degree of waterproofness and high resistance to mechanical damage which ensures comfort during installation. Thanks to high technology of termobonding the membrane is very strong and permanent