Roofing underlayment film 135

The roofing underlayment film 135 is an armed micro-perforated film made of a grid sandwiched between two polyethylene sheets. It is watertight; however, it allows ventilation of the ceiling thanks to its micro-perforation, not to forget its role as a thermal insulator. It is easy to use and is guaranteed for 10 years. The roofing underlayment film 135 is made to protect the ceiling against mould and leakage. It compensates for accidental flaws of the cover during storms, leakage or fresh powder snow penetration under the tiles. It must be laid carefully near chimney stacks, ceiling windows and ventilation exits.