{"product_id":"cromar-vent-3-classic-breather-membrane-felt-underlay-1-5m-x-50m-75m2-roll","title":"Cromar Vent 3 Classic Breather Membrane Felt Underlay 1.5m x 50m (75m2\/Roll)","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003ePremium triple-layer breather membrane crafted from high-tensile spun-bonded polypropylene and a micro-porous film. This innovative design resists water penetration while allowing moisture vapour to escape, delivering superior protection and durability for both warm and cold roof applications. \u003cbr\u003e\u003cbr\u003eIdeal for fully supported or unsupported tiled, slated, or metal roof systems, the membrane combines high vapour permeability with a robust waterproof barrier.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eThe outer layer forms a waterproof surface, the middle layer serves as a breathable barrier, and the inner layer protects against abrasion while adding extra strength. \u003cbr\u003e\u003cbr\u003eThe 1.5m width makes this roll particularly suited to large roofs and open areas, reducing the number of overlaps and speeding up installation, thereby improving overall efficiency on site.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple Layer Membrane:\u003c\/strong\u003e Combines three layers for enhanced waterproofing and breathability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight and Flexible:\u003c\/strong\u003e Facilitates quick installation, adapting easily to various roof contours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent Tensile and Tear Strength:\u003c\/strong\u003e Withstands high wind uplift and mechanical stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof Membrane:\u003c\/strong\u003e Provides robust protection against water penetration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Term Durability:\u003c\/strong\u003e Designed to last, ensuring continued performance over the roof’s lifespan.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV Stable:\u003c\/strong\u003e Maintains performance after up to 4 months of exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile for Roof Applications:\u003c\/strong\u003e Suitable for both warm and cold roof systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Additional Ventilation Required:\u003c\/strong\u003e Engineered to manage moisture without extra ventilation systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh coverage efficiency\u003c\/strong\u003e: 1.5m width reduces laps, increasing installation speed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiled Roofs:\u003c\/strong\u003e Provides a breathable yet waterproof barrier beneath tiles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlated Roofs:\u003c\/strong\u003e Protects the roof structure while allowing moisture to escape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal Roof Systems:\u003c\/strong\u003e Enhances performance by reducing condensation and ensuring longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnsupported Installations:\u003c\/strong\u003e Drapes over rafters, ensuring ease of installation and effective moisture management.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Over Insulation:\u003c\/strong\u003e Lays directly on top of insulation without compromising its effectiveness.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixing\u003c\/strong\u003e: Secure using corrosion-resistant nails, staples, or counter-battens.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaps\u003c\/strong\u003e: Maintain recommended side and end lap dimensions to ensure weatherproofing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport\u003c\/strong\u003e: Allow appropriate drape between rafters in unsupported installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV exposure\u003c\/strong\u003e: Cover with roof tiles or slates within 3 months of installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: Install in line with BS 5534:2014 and manufacturer’s instructions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction\u003c\/strong\u003e: Triple-layer breathable membrane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction\u003c\/strong\u003e: Vapour-permeable and water-resistant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e: Resistant to tearing, UV (temporary), and wind-driven rain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e: Suitable for warm and cold roof constructions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Must be installed as part of a ventilated pitched roof system in line with British Standards.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"1.5m","offer_id":53771555111023,"sku":"5004114","price":96.0,"currency_code":"GBP","in_stock":false},{"title":"1m","offer_id":53771555143791,"sku":"5004113","price":64.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/Cromar_Vent_3_Classic_Breather_Membrane_Felt_Underlay_-_Photo.jpg?v=1783758788","url":"https:\/\/supplyyard.co.uk\/products\/cromar-vent-3-classic-breather-membrane-felt-underlay-1-5m-x-50m-75m2-roll","provider":"Supply Yard","version":"1.0","type":"link"}