{"product_id":"wondervent-pro-breathable-pitched-roof-underlay-1m-50m-115g-m","title":"Wondervent Pro Breathable Pitched Roof Underlay – 1m × 50m, 115g\/m²","description":"\u003cp\u003eWonderbuilds Wondervent Pro is a premium breathable roofing membrane designed for use beneath pitched roof coverings. It helps protect against cold air and damp while allowing water vapour to escape, helping to reduce condensation within the roof construction.\u003c\/p\u003e\n\u003cp\u003eManufactured using two layers of non-woven polypropylene and a microporous film, Wondervent Pro combines strength, tear resistance and breathability. Its W1 watertightness classification, both before and after ageing, provides resistance to water penetration.\u003c\/p\u003e\n\u003cp\u003eSupplied in a 1m × 50m roll, this 115g\/m² pitched roof underlay offers 50m² of membrane before allowing for overlaps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBreathable membrane: Low Sd value of 0.02m allows water vapour to pass through.\u003c\/li\u003e\n\u003cli\u003eProtection against the elements: Helps protect the roof construction against cold air and damp.\u003c\/li\u003e\n\u003cli\u003eCondensation control: Helps reduce moisture build-up within the roof.\u003c\/li\u003e\n\u003cli\u003eThree-layer construction: Two non-woven polypropylene layers with a microporous film.\u003c\/li\u003e\n\u003cli\u003eW1 watertightness: Maintains its water resistance classification after ageing.\u003c\/li\u003e\n\u003cli\u003eStrong and tear-resistant: Designed to withstand handling during installation.\u003c\/li\u003e\n\u003cli\u003eBlack upper surface and grey underside.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll size\u003c\/strong\u003e - 1m × 50m.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll coverage\u003c\/strong\u003e - 50m² before overlaps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMass per unit area\u003c\/strong\u003e - 115g\/m².\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e - 0.45mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour\u003c\/strong\u003e – upper \/ lower - Black \/ Grey. ( May Vary )\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTensile strength\u003c\/strong\u003e – longitudinal \/ transverse - 300 \/ 200.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElongation\u003c\/strong\u003e – longitudinal \/ transverse - 70% \/ 70%.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTear resistance\u003c\/strong\u003e – longitudinal \/ transverse - 120N \/ 160N.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWatertightness\u003c\/strong\u003e – unaged \/ aged - W1 \/ W1.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater vapour diffusion equivalent air layer thickness (Sd)\u003c\/strong\u003e - 0.02m.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFollow the manufacturer’s fitting instructions, including requirements for overlaps, fixing and roof ventilation.\u003c\/p\u003e","brand":"Wonderbuilds","offers":[{"title":"Default Title","offer_id":57504383828294,"sku":"WONDERVENT-115\/1X50","price":48.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0572\/1670\/files\/Wondervent_Pro_Breather_115gram.png?v=1790927471","url":"https:\/\/flatroofingsystems.co.uk\/products\/wondervent-pro-breathable-pitched-roof-underlay-1m-50m-115g-m","provider":"Flat Roofing Systems","version":"1.0","type":"link"}