Multilayered foil for sealing of building roof spaces comprises a layer provided with holes which determine the water vapor permeability of the foil

摘要

The multilayered foil for sealing of building roof spaces comprises a layer (2) provided with holes (3) whose size and distribution determine the water vapor permeability of the foil. An independent claim is also included for a system consisting of the proposed multilayered foil with an adhesive tape.