Water vapor permeability membrane (wind water vapor permeability membrane) is laying insultation in the building envelope (insulation) layer outside the menbrane layer of functionality for curtain wall,steel (wood)structure,such as composite masonry walls and sloping roof,through the building envelope insulation(insulation)layer coated in the building to reduce water and air penetration, while also foster the building envelope and indoor humidity can be discharged effectively prevent mold and skeptical of water generated in the wall and roof to ensure insulation material performance of the play, so as to achieve energy efficiency, improve building durability, retaining the role of human settlements.
