{"product_id":"visqueen-low-permeability-gas-membrane-4m-x-12-5m","title":"Visqueen Low Permeability Gas Membrane 4m x 12.5m (50m²) | Radon Barrier","description":"\u003cp\u003eVisqueen Low Permeability Gas Membrane is a high-performance multi-layer polyethylene barrier designed for sites classified as Characteristic Situation 2 (CS2) under BS 8485. It provides combined protection against radon, methane, CO₂, and rising damp in a single robust membrane, suitable for residential, commercial, and brownfield developments.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cdiv class=\"sw-benefits-grid\"\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eUltra-low permeability rating for highest-risk gas protection\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eSuitable for Characteristic Situation 2 (CS2) sites per BS 8485\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eCombined gas and damp-proof membrane in one layer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eBBA certified for radon, methane, and CO₂ protection\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eRobust multi-layer construction resists site damage\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eWide 4 m roll width minimises laps and joint sealing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eCompatible with Visqueen jointing tapes and accessories\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eMeets Building Regulations Part C requirements\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eLay the membrane across the prepared sub-base or slab with a minimum 150 mm overlap at all joints. Seal all laps using Visqueen double-sided gas-resistant jointing tape. Dress membrane up at walls and around all penetrations to form a continuous gas-tight barrier. Protect from damage during subsequent construction activities.\u003c\/p\u003e\n\u003ch3\u003eCoverage\u003c\/h3\u003e\n\u003cp\u003eEach roll covers 50 m² (4 m × 12.5 m). Allow for 150 mm overlaps at all joints when calculating roll quantities. For complex floor plans, allow approximately 10–15% additional material for waste and lapping.\u003c\/p\u003e","brand":"VISQUEEN","offers":[{"title":"Default Title","offer_id":51305584099667,"sku":"VISQUEEN-12-STD","price":186.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6720\/9043\/files\/low-permeability-gas-membrane-yellow-01web.jpg?v=1772119191","url":"https:\/\/shop.screedworks.co.uk\/products\/visqueen-low-permeability-gas-membrane-4m-x-12-5m","provider":"screedworks","version":"1.0","type":"link"}