{"title":"Gas \u0026 Damp Proof Membrane","description":"\u003cp\u003eGas and damp proof membranes protect floor constructions from ground moisture, radon gas, and methane. Our range includes both liquid-applied epoxy DPM systems and traditional sheet membranes, providing solutions for new-build and refurbishment projects. Products from ARDEX and other leading manufacturers accommodate moisture readings up to 98% RH.\u003c\/p\u003e","products":[{"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":167.63,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6720\/9043\/files\/K2Xbav-EEs7ZsNYP-8GB4Qs_1_gps_generated.jpg?v=1792763264"},{"product_id":"visqueen-radon-r400-membrane-4m-x-25m-100sqm","title":"Visqueen Radon R400 Membrane 4m x 25m (100sqm)","description":"\u003cp\u003eVisqueen Radon R400 is a 400 µm polyethylene membrane specifically designed as a radon gas barrier for affected areas. It also functions as a damp-proof membrane, providing dual protection in a single layer. BBA certified (BBA 13\/5069) and conforming to BR 211:2023, it is suitable for new-build ground floor constructions in radon-affected zones.\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\u003eSpecifically designed for radon protection in affected areas\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 thickness provides robust, tear-resistant performance\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 (BBA 13\/5069) for radon gas barrier applications\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eAlso acts as a damp-proof membrane — dual function\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003e80 m² roll for efficient coverage on larger projects\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003e4 m width reduces the number of laps required\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 radon jointing tapes and sealants\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 for radon-affected areas\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 concrete slab with a minimum 150 mm overlap at all joints. Seal laps with Visqueen Radon double-sided jointing tape. Dress membrane up walls and around all service penetrations to maintain a continuous radon-tight seal. Protect the installed membrane from puncture during subsequent works.\u003c\/p\u003e\n\u003ch3\u003eCoverage\u003c\/h3\u003e\n\u003cp\u003eEach roll covers 80 m² (4 m × 20 m). Allow for 150 mm overlaps at all joints when calculating quantities. For complex layouts with multiple penetrations, allow approximately 10–15% additional material for waste and lapping.\u003c\/p\u003e","brand":"VISQUEEN","offers":[{"title":"Default Title","offer_id":51305583903059,"sku":"VISQUEEN-R400-STD","price":251.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6720\/9043\/files\/ETrbaqiIN-KO9OUP3_yG4AY_0_gps_generated.jpg?v=1792752203"},{"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 flexible 0.5 mm thick thermoplastic membrane that complies with NHBC Amber 1, for low gas risk NHBC housing sites. It provides combined protection against radon, methane, CO₂, and rising damp in a single robust membrane, suitable for radon and damp proofing applications and NHBC Amber 1 housing sites.\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\u003eLow permeability rating for radon and NHBC Amber 1 (low gas risk) 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\u003eComplies with NHBC Amber 1 – suitable for low gas risk NHBC housing sites\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 0.5 mm thermoplastic 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. Bond all laps with VisqueenPro Double Sided Jointing Tape and seal with Visqueen NF-60 Lap 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":223.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6720\/9043\/files\/ulnbauX0C8OA9OUPicj86Ak_0_gps_generated.jpg?v=1792760323"},{"product_id":"visqueen-gas-barrier-2m-x-50m-100m2","title":"Visqueen Gas Barrier 2m x 50m (100m²) | Radon \u0026 Methane Membrane","description":"\u003cp\u003eVisqueen Gas Barrier is a multi-layer polyethylene membrane providing combined protection against ground gases (radon, methane, and CO₂) and rising damp. BBA certified to BS 8485 and BS 8102, it is designed for use in new-build residential and commercial ground floor constructions where gas and moisture protection is required.\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 gas and damp-proof protection 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\u003eEffective barrier against radon, methane, and carbon dioxide\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 to BS 8485 and BS 8102\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eHigh puncture resistance for robust site handling\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003e100 m² roll provides efficient coverage with fewer joints\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 sub-slab and above-slab gas membrane applications\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eEasy to weld and tape at laps for a continuous seal\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 jointing tape. Ensure the membrane is dressed up at walls and penetrations to form a continuous barrier. Take care to avoid puncturing during subsequent construction works.\u003c\/p\u003e\n\u003ch3\u003eCoverage\u003c\/h3\u003e\n\u003cp\u003eEach roll covers 100 m² (2 m × 50 m). Allow for 150 mm overlaps at all joints when calculating the number of rolls required. For complex floor plans with multiple penetrations, allow approximately 10–15% additional material for waste and lapping.\u003c\/p\u003e","brand":"VISQUEEN","offers":[{"title":"Default Title","offer_id":51305584296275,"sku":"VISQUEEN-50M-STD","price":748.31,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6720\/9043\/files\/yFjbavX1JJGN9OUP8-GDoQs_1_gps_generated.jpg?v=1792760109"}],"url":"https:\/\/shop.screedworks.co.uk\/collections\/gas-damp-proof-membrane.oembed","provider":"Screed Works Shop","version":"1.0","type":"link"}