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Surface density: 130g/m². Roll length: 50m. Roll width: 1.5m. Colour: black. Material: 2 x non-woven PP layers + PE membrane. Resistant to water penetration: Class W1. Sarking felt is triple-layer vapour-permeable roofing felt. Between two non-woven PP layers there is a breathable PE membrane. This makes the sarking felt waterproof and vapour-permeable at the same time. This material never fails to impress thanks to high stability and vapour permeability, whilst remaining waterproof. The sarking felt, also cased underlayment, is placed directly on rafters or roof boards. It is also possible to position the sarking felt on top of an insulation layer., Manufacturer: Aquagart