225 m² underlay Formwork membrane Roofing 130 g 1.5 m wide

General description The 225 m² underlay formwork membrane is a three-layer, breathable roofing membrane designed for effective moisture management. It features a breathable PE membrane sandwiched between two layers of PP non-woven fabric, ensuring waterproofing while allowing air permeability. Technical specifications Surface 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 directly applied to the roof rafters or the roof sheathing. It is also possible to lay the membrane directly on the thermal insulation.