{"product_id":"icopal-anderson-vbl-venting-base-layer","title":"Icopal Anderson VBL Venting Base Layer","description":"\u003cp class=\"MsoNormal\"\u003eThe Icopal Anderson VBL Venting Base Layer is a perforated bituminous membrane designed to act as a base sheet within high-performance built-up roofing systems. Manufactured on a reinforced glass fibre carrier, the sheet is precision-perforated with 25 mm holes staggered at 75 mm intervals, allowing partial bonding to the substrate and effective venting of trapped moisture.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThis layer is installed loose-laid and spot-bonded by torch application, forming a stable platform for subsequent waterproofing layers while reducing the risk of blistering or trapped vapour within the roof build-up.\u003c\/p\u003e\n\u003ch3 class=\"MsoNormal\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003eDual-sided bitumen coating for reliable performance\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eFine silica sand finish to improve handling and application\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003ePerforated reinforcement for controlled partial bonding and moisture release\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eCompatible with most building materials (not recommended for use with solvent-based hydrocarbons)\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eSupplied in 20 m x 1 m rolls\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eThickness: 4.0 mm | Roll weight: approx. 30 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"MsoNormal\"\u003eCertifications \u0026amp; Standards\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003eComplies with BS 8747:2007 for reinforced bituminous membranes\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eManufactured under ISO 9001 quality management systems\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eProduced to ISO 14001 environmental standards\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eSupplied on pallets and heat-shrink wrapped for protection in transit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"MsoNormal\"\u003eApplication Guidance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003eSubstrate must be clean, dry, and free from dust or debris\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eMembrane is loose-laid, then lightly bonded to the substrate by torch-on technique\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eOverlaid with a compatible underlay or waterproofing membrane, which is torch-bonded into place\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"MsoNormal\"\u003eStorage \u0026amp; Handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003eStore rolls upright in a cool, dry, and shaded environment\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eProtect from direct sunlight and contact with solvents\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eDelivered shrink-wrapped on wooden pallets for secure handling and storage\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/roofing-supplies\"\u003eroofing supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/flat-roofing\"\u003eflat roofing\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Icopal","offers":[{"title":"Default Title","offer_id":51460173562198,"sku":"1850","price":69.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/icopal-anderson-vbl-venting-base-layer-1159946.jpg?v=1772656633","url":"https:\/\/jjbuildingmaterials.co.uk\/products\/icopal-anderson-vbl-venting-base-layer","provider":"JJ Building Materials","version":"1.0","type":"link"}