One solution for every roof, upgrade your roofing with this breathable membrane roofing underlay, designed for homes, sheds, and pitched roof systems. Measuring 1.5x50m (4.92x164ft) and covering 75m² (807ft²), each lightweight roll offers professional-grade performance for both DIY and trade use. The 3-layer construction features a vapour permeable film between two polypropylene fleece layers, allowing internal humidity to escape while blocking external water. Rated W1 for maximum water resistance, this roof vapour barrier membrane is suitable under felt, shingles, tiles or metal sheets, and works in both ventilated and fully sarked roofing systems.

This roof underlayment combines durability and flexibility for easy installation. Each roll weighs approximately 9.5kg (20.94lbs) and is light enough for single-person handling, yet strong enough to resist tearing during fitting. At 120g/m², it can be stapled or taped to create a watertight seal that prevents leaks and draughts. Breathable roofing membrane made for extreme weather, it withstands UV exposure for up to 4 months, with a temperature resistance from -40°C to +100°C. Suitable for tile roof underlay, pitched roof projects, and roof insulation systems, it ensures long-lasting moisture protection and breathability.

Something not quite right? You have 28 days from the day you receive it, to send something back.

Please note, we cannot offer refunds on fashion face masks, cosmetics, pierced jewellery, adult toys, and swimwear or lingerie if the hygiene seal is not in place or has been broken.

Items of footwear and/or clothing must be unworn and unwashed with the original labels attached. Also, footwear must be tried on indoors. Items of homeware including bedlinen, mattresses, and toppers, and pillows must be unused and in their original unopened packaging. This does not affect your statutory rights.

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