{"product_id":"rhinoplast-super-gas-barrier-4m-x-20m","title":"RHINOPLAST Super Gas Barrier 4m x 20m","description":"\u003cp\u003eRHINOPLAST Super Gas Barrier is a high-performance polyethylene membrane providing combined damp-proof and gas-resistant protection for ground-floor constructions. It acts as both a DPM and a barrier against methane and carbon dioxide ingress, meeting the requirements of BS 8485 and CIRIA C665 for developments on sites affected by ground gas. Supplied in 4 m × 20 m rolls (80 m²).\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\u003eCombined DPM and gas barrier in a single membrane\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eProtects against methane and carbon dioxide ingress\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 BS 8485 and CIRIA C665 requirements\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003e400 µm (1600 gauge) heavy-duty polyethylene\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 ground-bearing slabs and suspended floors\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 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\u003eLarge roll size (80 m²) for efficient coverage\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eLay the membrane over the prepared sub-base or blinding layer with a minimum 300 mm overlap at all joints. Seal all overlaps with double-sided gas-resistant tape. Turn up at perimeters and seal to the rising walls. Take care to avoid puncturing the membrane during installation. Protect with a sand blinding layer or screed as soon as practicable. Ensure all penetrations are sealed with compatible gas-tight detailing.\u003c\/p\u003e\n\u003ch3\u003eCoverage\u003c\/h3\u003e\n\u003cp\u003eEach roll covers 80 m² (4 m × 20 m). Allow approximately 10–15% extra for overlaps and wastage depending on floor plan complexity.\u003c\/p\u003e","brand":"RHINOPLAST","offers":[{"title":"Default Title","offer_id":51305571156307,"sku":"RHINOPLAST-20M-STD","price":139.69,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6720\/9043\/files\/Screenshot2025-12-12at12.27.48.png?v=1765538931","url":"https:\/\/shop.screedworks.co.uk\/products\/rhinoplast-super-gas-barrier-4m-x-20m","provider":"screedworks","version":"1.0","type":"link"}