525 m² underlay Formwork membrane Roofing 130 g 1.5 m wide

General description The underlay formwork membrane is a 3-layer, diffusion-open roofing membrane. It features a breathable PE membrane sandwiched between two layers of PP non-woven fabric, ensuring it is waterproof while remaining air-permeable. The material is characterized by high stability and vapor diffusion, making it an excellent choice for roofing applications. Technical specifications Weight: 130 g/m² Roll length: 50 m Roll width: 1.5 m Color: Black Material: 2 x PP non-woven + PE membrane Water penetration resistance: Class W1 Fire behavior: Class E UV stability: 3 months SD value: 0.02 m Water vapor permeability: 2000 g/m²/24h Tensile strength (lengthwise/crosswise): 190 N/50 mm / 140 N/50 mm Application temperature: -20 to +90 degrees Celsius Installation The underlay membrane can be applied directly to the roof rafters or the roof sheathing. It is also possible to lay the membrane directly on the thermal insulation.