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General description This underlay formwork membrane is a three-layer, diffusion-open roofing membrane designed for effective moisture management. It features a breathable PE membrane sandwiched between two layers of PP non-woven fabric, ensuring that it is waterproof while remaining air-permeable. 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 membrane can be applied directly to the roof rafters or the roof sheathing. It is also possible to lay the roofing membrane directly on the thermal insulation.
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