{"product_id":"self-adhesive-peel-stick-roofing-underlay-fully-bonded-vapour-permeable-membrane-1-5m-x-30m","title":"Self-Adhesive Peel \u0026amp; Stick Roofing Underlay – Fully-Bonded Vapour Permeable Membrane, 1.5m x 30m","description":"\u003cp\u003eA loose-laid breather membrane relies on overlaps and battens to hold it in place — fine on a standard pitch, but on a low-pitch roof or an exposed, wind-loaded site, wind can get underneath it before the tiles or battens are on. This underlay solves that differently: it's fully self-adhesive, bonding directly to the deck so there's nothing for wind to lift and no reliance on lap joints alone for weathertightness.\u003c\/p\u003e\n\u003cp\u003eBecause it bonds solid rather than floating, it also works as genuine secondary weatherproofing during the build — if the roof covering is delayed by weather, a fully-bonded underlay is doing far more than a loose-laid one to keep the structure dry underneath.\u003c\/p\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFully-bonded, self-adhesive, vapour-permeable roofing underlay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoll size\u003c\/td\u003e\n\u003ctd\u003e1.5m x 30m (45m² coverage)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication method\u003c\/td\u003e\n\u003ctd\u003ePeel-off release liner, adheres directly to roof deck\/sheathing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical use\u003c\/td\u003e\n\u003ctd\u003eLow-pitch roofs, wind-uplift-exposed sites, secondary weatherproofing during build delays, airtightness-focused self-builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOrdering guidance\u003c\/h3\u003e\n\u003cp\u003eThis is a premium, fully-bonded product positioned above our standard \u003ca href=\"\/products\/breathable-roofing-membrane-125gsm-roof-wall-underlay\"\u003eBreathable Roofing Membrane\u003c\/a\u003e (a loose-laid, mechanically-fixed underlay for standard-pitch roofs at a lower cost per m²) — choose this range specifically where low pitch, high wind exposure, or airtightness performance is the deciding factor, and the standard breather membrane for everything else. Check deck compatibility (typically timber sheathing) with the manufacturer's guidance before application.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow is this different from your standard breathable membrane?\u003c\/strong\u003e The standard membrane is loose-laid and mechanically fixed under battens; this product bonds solid to the deck via a self-adhesive backing — a different fixing technology aimed at low-pitch and high-wind-exposure situations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat roof pitch is it suitable for?\u003c\/strong\u003e Self-adhesive underlays are typically specified for lower roof pitches than standard loose-laid membrane can reliably weatherproof — check the manufacturer's minimum pitch guidance for your exact roof design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be left exposed before the roof covering goes on?\u003c\/strong\u003e Being fully bonded gives genuinely useful temporary weather protection during a build, but it is not a substitute for timely covering — follow the manufacturer's maximum UV\/weather exposure period.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat surface does it bond to?\u003c\/strong\u003e Typically timber roof sheathing\/decking — confirm deck type and condition (clean, dry, sound) before application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it vapour permeable?\u003c\/strong\u003e Yes — it's designed to shed liquid water while still allowing the roof structure to breathe, unlike a solid vapour-closed barrier.\u003c\/p\u003e","brand":"Rubber Roof UK","offers":[{"title":"1.5m x 30m (45m²)","offer_id":46014840144063,"sku":"SAU-1.5X30","price":681.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0598\/1804\/9727\/files\/self-adhesive-roofing-underlay-bonded-timber-roof-deck.jpg?v=1786783348","url":"https:\/\/rubberroofuk.uk\/products\/self-adhesive-peel-stick-roofing-underlay-fully-bonded-vapour-permeable-membrane-1-5m-x-30m","provider":"Rubber Roof UK","version":"1.0","type":"link"}