{"title":"Radon \u0026 Gas Barriers","description":"\u003cp\u003eRadon and gas barriers are low permeability membranes installed within the floor construction to stop harmful ground gases, including radon, methane and carbon dioxide, from entering a building. They are laid as a continuous, sealed layer that closes off the pathway between radon affected or contaminated ground and the spaces above. The range covers polythene radon barrier membranes, multi-layer gas barriers for sites with wider ground gas risks, liquid applied and self adhesive options, and the jointing accessories needed to complete a sealed installation. Because the same low permeability material also resists ground moisture, many of these membranes act as a damp proof membrane as well, giving dual protection against ground gas and damp in a single layer across concrete slab, block and beam and suspended timber floor construction.\u003c\/p\u003e\n\u003ch2\u003eWhat is a radon barrier?\u003c\/h2\u003e\n\u003cp\u003eA radon barrier, also referred to as a radon gas barrier, is a low permeability sheet membrane laid beneath the floor to prevent radon from passing out of the ground and into the building above. Radon is a naturally occurring radioactive gas formed by the decay of uranium in rocks and soil. It is colourless, odourless and tasteless, and it can accumulate inside a building where there is a gas pathway from the ground and ventilation is limited. A correctly specified and installed radon barrier forms a sealed envelope across the floor that blocks that pathway. As the polythene used also resists moisture, a radon barrier will usually function as a damp proof membrane too, which is why these products are often described as a radon barrier dpm.\u003c\/p\u003e\n\u003ch2\u003eWhen radon protection is required\u003c\/h2\u003e\n\u003cp\u003eRadon is present to some degree in nearly all buildings, and it is recognised as the largest source of natural background radiation in the UK and the second largest cause of lung cancer after smoking. The level of risk depends largely on local geology, so the requirement for protection varies considerably from one site to the next.\u003c\/p\u003e\n\u003ch3\u003eRadon affected areas and the UK radon map\u003c\/h3\u003e\n\u003cp\u003eAreas with higher concentrations of uranium and radium bearing rock, such as parts of the South West of England, Wales, Derbyshire, Northamptonshire and parts of Yorkshire, carry a higher radon risk. Before specifying protection, developers and contractors should check the UK radon map published by the UK Health Security Agency to confirm whether a site falls within a radon affected area and what level of protection applies.\u003c\/p\u003e\n\u003ch3\u003eRadon protection and building regulations\u003c\/h3\u003e\n\u003cp\u003eWhere a property is being built or significantly extended in a radon affected area, building regulations require radon protective measures to be incorporated. The level of protection, either basic or full, is determined by the local radon risk and set out in BR 211, Radon: Guidance on Protective Measures for New Buildings. Basic protection generally calls for a radon barrier across the floor, while full protection adds a passive sub floor depressurisation provision, such as a radon sump, that can be activated later if testing shows it is needed.\u003c\/p\u003e\n\u003ch2\u003eRadon barrier membranes\u003c\/h2\u003e\n\u003cp\u003eRadon barrier membranes are the standard solution for new build and extension projects in radon affected areas. They are manufactured from low permeability polythene and laid either above or below the floor slab to form a continuous barrier. A common question is whether an ordinary damp proof membrane can be used as a radon barrier. While most radon barriers also perform as a dpm, the reverse does not hold: a standard polythene dpm is not tested or certified for radon resistance, so it should not be used in place of a dedicated radon barrier where protection is required. Radon barrier membranes are available in a range of thicknesses and performance grades, including heavier gauge and reinforced options for sites needing a higher level of protection.\u003c\/p\u003e\n\u003ch3\u003eRadon barriers for different floor types\u003c\/h3\u003e\n\u003cp\u003eA radon barrier can be used across all the main floor construction types. Under a concrete floor slab the barrier is laid on the substrate or blinding and lapped into the wall damp proof course at the perimeter. On block and beam floors it is laid over the beam profile, and on a suspended timber floor it is dressed across the structure. In each case all joints are sealed and the perimeter is turned up to maintain a continuous barrier. Choosing a radon barrier for under slab, block and beam or suspended timber floor construction comes down to the installation detail rather than a different class of product.\u003c\/p\u003e\n\u003ch2\u003eGas barriers for methane and contaminated ground\u003c\/h2\u003e\n\u003cp\u003eA gas barrier is a higher performance membrane used where a site investigation has identified ground gases beyond radon alone, typically methane and carbon dioxide from landfill or former industrial land, and in some cases volatile organic compounds and hydrocarbons from contaminated ground. These gas barrier membranes use a multi-layer construction to deliver very low permeability across a range of gas types and concentrations. The grade of gas barrier required is determined by the ground gas regime established on site, and the system should be designed in line with BS 8485, with the installed barrier verified in line with CIRIA C735, and meet the relevant NHBC requirements. For mixed or elevated gas risk, a low permeability multi-layer gas barrier is specified in place of a basic polythene radon barrier.\u003c\/p\u003e\n\u003ch2\u003eLiquid applied gas barriers\u003c\/h2\u003e\n\u003cp\u003eWhere sheet installation is impractical, or a fully bonded solution is needed, a liquid applied gas barrier provides an alternative. It is brush or roller applied directly onto a prepared concrete substrate to form a seamless gas resistant layer, and it suits retrofit work and complex detailing around penetrations where a sheet membrane would be difficult to seal. Once cured, a liquid radon barrier offers the same continuous protection as a sheet system.\u003c\/p\u003e\n\u003ch2\u003eInstalling radon and gas barriers\u003c\/h2\u003e\n\u003cp\u003eThe performance of any radon barrier or gas barrier depends as much on the installation as on the membrane itself. A barrier with unsealed laps, missing detailing at pipe penetrations or a poorly closed perimeter will allow gas to bypass it, whatever the grade of membrane specified. This is why correct radon barrier installation detail matters as much as product selection, and why the membrane must form a fully sealed envelope across the floor.\u003c\/p\u003e\n\u003ch3\u003eSealing, jointing and detailing\u003c\/h3\u003e\n\u003cp\u003eWhen installing a radon barrier, sheets should be lapped and sealed in line with the manufacturer's instructions, typically by a minimum of 300mm, using the appropriate radon barrier tape or gas membrane jointing tape. Preformed top hats are fitted at all service penetrations, and the membrane is dressed up and lapped with the wall damp proof course at the perimeter to keep the barrier continuous. DIY kits that bring the membrane, jointing tape and top hats together in one pack are a convenient option for smaller projects.\u003c\/p\u003e\n\u003ch3\u003ePassive radon sumps\u003c\/h3\u003e\n\u003cp\u003eOn sites requiring full protection, a passive radon sump and pipework is installed within or below the slab. It sits dormant once the barrier is in place but allows the system to be upgraded to an active one by fitting an extract fan if post construction testing shows radon levels remain elevated. It is this combination of a sealed barrier and a contingency sump that makes a full radon protection system both effective and able to be upgraded later.\u003c\/p\u003e\n\u003ch2\u003eChoosing the right radon or gas barrier\u003c\/h2\u003e\n\u003cp\u003eThe right product follows from the ground conditions established for the site. For most new build and extension projects in radon affected areas, a polythene radon barrier provides the protection required under BR 211. For sites with elevated methane, carbon dioxide or mixed ground gas risk from contaminated land, a multi-layer gas barrier specified to BS 8485 is needed. Where sheet installation is impractical, a liquid applied membrane is the alternative.\u003c\/p\u003e\n\u003cp\u003eIt is worth being clear on what these products do and do not do. Radon and gas barriers are designed to resist ground gas and ground moisture, and many also serve as a damp proof membrane, but they are not a waterproofing system for resisting liquid water under hydrostatic pressure. Where a structure is below the water table or otherwise subject to water pressure, a dedicated tanking system is required, which you can find in our Tanking range.\u003c\/p\u003e\n\u003ch2\u003eWhy choose Construction Supplies UK for radon and gas barriers\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eComplete ground gas protection in one place:\u003c\/strong\u003e From polythene radon barriers and multi-layer gas barriers to liquid applied membranes, jointing accessories and passive sump components, we stock what is needed to specify and complete a sealed installation for basic or full protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrusted industry brands: \u003c\/strong\u003eShop leading manufacturers including Novia, Visqueen, ITP and Principal Building Products.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompetitive trade prices:\u003c\/strong\u003e Radon and gas barriers at competitive trade prices with no minimum order value.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFast UK-wide delivery:\u003c\/strong\u003e Reliable nationwide delivery with free shipping on orders over £300.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert support when you need it:\u003c\/strong\u003e Our team can help you confirm the right specification for your project. Contact us at \u003ca href=\"sales@constructionsuppliesuk.co.uk\"\u003e\u003cstrong\u003esales@constructionsuppliesuk.co.uk\u003c\/strong\u003e\u003c\/a\u003e or call \u003cstrong\u003e03300 55 32 02\u003c\/strong\u003e.\u003c\/p\u003e","products":[{"product_id":"novia-methane-pro-390gsm-gas-barrier-diy-kit","title":"Novia Methane Pro 390gsm Gas Barrier DIY KIT","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv dir=\"ltr\" aria-busy=\"false\" aria-live=\"polite\" id=\"model-response-message-contentr_935ab606bcd817b7\" class=\"markdown markdown-main-panel stronger enable-updated-hr-color\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Novia Methane Pro 390 Gas Barrier DIY Kit contains everything needed to install a compliant methane gas barrier in a domestic setting. At the heart of the kit is Novia's Methane Pro 390, a 390gsm multi-layer virgin polythene membrane with an aluminium foil core and reinforcement scrim, compliant with BS 8485 and UKCA marked to EN 13967. The kit includes six rolls of 50mm Double Sided Butyl Tape for sealing all laps and joints with a minimum 50mm bond as required for gas barrier applications, and two rolls of 96mm Aluminium Foil Lap Tape for finishing and reinforcing critical overlaps. All products in the kit are selected to work together and meet the requirements for methane gas barrier installation in residential new build and renovation projects on contaminated or brownfield land.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eComplete DIY kit, everything needed for a compliant methane gas barrier installation included\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMethane Pro 390 meets BS 8485 methane barrier requirements\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eUKCA marked to EN 13967 for assured performance\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMulti-layer construction with aluminium foil core provides robust resistance to methane gas ingress\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e50mm Double Sided Butyl Tape provides a minimum 50mm bond at all joints and laps as required for gas barrier applications\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e96mm Aluminium Foil Lap Tape reinforces and finishes critical overlaps\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eRemoves the guesswork, compatible products specified and pre-selected\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eKit contents: 1 x Methane Pro 390 Gas Barrier (1.6m x 50m), 6 x Double Sided Butyl Tape (50mm x 10m), 2 x Aluminium Foil Lap Tape (96mm x 45m)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMembrane can be taped or welded at joints\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eFor gas barrier installations, a minimum 50mm butyl tape bond is required at all laps, the included tape meets this requirement\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAlways consult BS 8485 and relevant building regulations, and seek specialist ground gas risk assessment advice for your project\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":57127687979340,"sku":"BM05681","price":304.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/novia-novia-methane-pro-390gsm-gas-barrier-diy-kit-1232467517.jpg?v=1776260110"},{"product_id":"novia-1600-gauge-polythene-radon-gas-barrier-diy-kit","title":"Novia 1600 Gauge Polythene Radon Gas Barrier DIY KIT","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv dir=\"ltr\" aria-busy=\"false\" aria-live=\"polite\" id=\"model-response-message-contentr_935ab606bcd817b7\" class=\"markdown markdown-main-panel stronger enable-updated-hr-color\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Novia 1600 Gauge Polythene Radon Gas Barrier DIY Kit contains everything needed to install a compliant radon gas barrier in a domestic setting. At the heart of the kit is Novia's 1600G Virgin Grade Polythene Radon Gas Barrier, a 400 micron virgin grade polythene membrane compliant with BR 211 and BS 8485, CE marked to EN 13967:2012. The kit includes six rolls of 50mm Double Sided Butyl Tape for sealing all laps and joints with a minimum 50mm bond, and two rolls of 96mm Aluminium Foil Lap Tape for finishing and reinforcing critical overlaps. All products in the kit are selected to work together and meet the requirements for radon barrier installation in residential new build and renovation projects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eComplete DIY kit, everything needed for a compliant radon barrier installation included\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e1600G membrane meets BR 211 and BS 8485 radon barrier requirements\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eCE marked to EN 13967:2012 for assured performance\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e50mm Double Sided Butyl Tape provides a minimum 50mm bond at all joints and laps as required for gas barrier applications\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e96mm Aluminium Foil Lap Tape reinforces and finishes critical overlaps\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eRemoves the guesswork, compatible products specified and pre-selected\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eKit contents: 1 x 1600G Radon Gas Barrier (4m x 20m), 6 x Double Sided Butyl Tape (50mm x 10m), 2 x Aluminium Foil Lap Tape (96mm x 45m)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMembrane can be taped or welded at joints\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eFor radon barrier installations, a minimum 50mm butyl tape bond is required at all laps, the included tape meets this requirement\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAlways consult current BR 211 guidance and relevant building regulations for your project\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":57127688044876,"sku":"BM05682","price":212.86,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/novia-novia-1600-gauge-polythene-radon-gas-barrier-diy-kit-1232467522.jpg?v=1776260015"},{"product_id":"novia-methane-pro-390gsm-gas-barrier-dpm","title":"Novia Methane Pro 390gsm Gas Barrier \u0026 DPM","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv dir=\"ltr\" aria-busy=\"false\" aria-live=\"polite\" id=\"model-response-message-contentr_935ab606bcd817b7\" class=\"markdown markdown-main-panel stronger enable-updated-hr-color\"\u003e\n\u003cp data-path-to-node=\"0\"\u003eNovia Methane Pro 390 is a multi-layer virgin polythene laminate with a reinforced aluminium foil core and reinforcement scrim, suitable for use as a loose laid methane, carbon dioxide and radon gas barrier and high specification damp proof membrane. Weighing 390gsm with a minimum thickness of 0.4mm, it complies with BS 8485 for methane gas applications and meets EN 13967 as a DPM. UKCA approved. Suitable for both taped and welded installations. Blue on one side and silver on the reverse with no text or images. Available on NBS Create and NBS Plus. Supplied as a 1.6m x 50m roll (80m²).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSuitable for use as a methane, carbon dioxide and radon gas barrier and high specification DPM\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eBS 8485 compliant for methane gas applications\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMethane transmission rates significantly below limits required under BS 8485\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMulti-layer construction with reinforced aluminium foil core and reinforcement scrim\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eTough, tear resistant and reinforced material\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSuitable for both taped and welded installations\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eUKCA approved to BS EN 13967\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMethane transmission tested to BS ISO 15105-1 — ≤0.1 ml\/(m².day.atm) for main membrane sheet, ≤13.6 ml\/(m².day.atm) for taped joints and ≤18.3 ml\/(m².day.atm) for welded joints\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eIf installed as a taped system use Novia Double Sided Butyl Tape (50mm minimum width) between laps and Novia Aluminium Foil Lap Tape (96mm minimum width) on overlaps\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eBlue on one side and silver on the reverse with no text or images\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAvailable on NBS Create and NBS Plus\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSupplied as a 1.6m x 50m roll (80m²)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":57127695515980,"sku":"BM05714","price":242.43,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/novia-novia-methane-pro-390gsm-gas-barrier-dpm-1232467683.jpg?v=1776258951"},{"product_id":"novia-1600g-radon-gas-barrier","title":"Novia 1600G Radon Gas Barrier","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv dir=\"ltr\" aria-busy=\"false\" aria-live=\"polite\" id=\"model-response-message-contentr_935ab606bcd817b7\" class=\"markdown markdown-main-panel stronger enable-updated-hr-color\"\u003e\n\u003cp data-path-to-node=\"0\"\u003eNovia 1600G Radon Gas Barrier is a 400 micron (1600 gauge) virgin grade polythene membrane providing a continuous, impermeable barrier against radon gas ingress. Compliant with BR 211 and BS 8485 for radon protection and meets EN 13967 as a damp proof membrane. CE approved to EN 13967:2012. Suitable for both taped and welded installations. Green in colour with no text or images. Available on NBS Chorus and NBS Source. Supplied multifolded in a 4m x 20m roll (80m²).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eCompliant with BR 211 and BS 8485 for radon protection\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAlso functions as a damp proof membrane, meeting EN 13967\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSuitable for both taped and welded installations\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eVirgin grade polythene with no recycled content\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eCE approved to EN 13967:2012\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAvailable on NBS Chorus and NBS Source\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eWhen installing as a taped system use Novia Double Sided Butyl Tape (50mm minimum width) between laps and Novia Aluminium Foil Lap Tape (96mm minimum width) on overlaps to ensure a complete gas seal\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eWelded installations must be undertaken by competent and experienced operatives and are subject to independent verification in accordance with CIRIA C735\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eGreen in colour with no text or images\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSupplied multifolded in a 4m x 20m roll (80m²)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":57127695679820,"sku":"BM05715","price":146.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/novia-novia-1600g-radon-gas-barrier-1232467682.jpg?v=1776258893"},{"product_id":"newton-hydrobond-2k-flex-bitumen-waterproofing-membrane","title":"Newton HydroBond 2K-Flex Bitumen Waterproofing Membrane","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"markdown markdown-main-panel stronger enable-updated-hr-color\" id=\"model-response-message-contentr_935ab606bcd817b7\" aria-live=\"polite\" aria-busy=\"false\" dir=\"ltr\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNewton HydroBond 2K-Flex is a high-performance, two-component bitumen waterproofing membrane designed for the external protection of below-ground structures. This solvent-free, polystyrene-filled system consists of a bitumen emulsion and a reactive powder catalyst which, when mixed, form a thick and highly flexible reinforced coating. It is specifically engineered to provide a seamless \"Type A\" waterproofing barrier that can bridge cracks up to 2mm, making it ideal for basements, foundations, and earth-retaining walls. Certified for radon gas resistance, the 2K-Flex system provides rapid waterproofing and becomes rain-fast shortly after application. Its lightweight consistency allows for easy trowel application or can be spray-applied for maximum efficiency on larger commercial projects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"3,0,0\"\u003eFully-bonded seamless membrane eliminates the risk of water tracking behind the coating\u003c\/li\u003e\n\u003cli data-path-to-node=\"3,1,0\"\u003eExceptional crack-bridging capability up to 2mm allows the system to accommodate minor structural movement\u003c\/li\u003e\n\u003cli data-path-to-node=\"3,2,0\"\u003eRapid-reaction formula ensures the membrane is quickly rain-fast and ready for site progression\u003c\/li\u003e\n\u003cli data-path-to-node=\"3,3,0\"\u003eCertified resistance to radon gas provides an additional layer of safety for below-ground environments\u003c\/li\u003e\n\u003cli data-path-to-node=\"3,4,0\"\u003eSolvent-free and non-toxic formula makes it safe for use in confined areas or near sensitive landscaping\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"5,0,0\"\u003eSupplied as a 30-litre two-component kit (bitumen emulsion and reactive powder)\u003c\/li\u003e\n\u003cli data-path-to-node=\"5,1,0\"\u003eApplication rate is approximately 5.6 litres per square metre for a standard 4mm cured thickness\u003c\/li\u003e\n\u003cli data-path-to-node=\"5,2,0\"\u003eBest used in conjunction with HydroBond 2K-Flex Primer and Mesh for a fully reinforced system\u003c\/li\u003e\n\u003cli data-path-to-node=\"5,3,0\"\u003eCan also be used as a high-strength adhesive for fixing insulation boards to foundation walls\u003c\/li\u003e\n\u003cli data-path-to-node=\"5,4,0\"\u003eSubstrates should be clean, sound, and primed prior to application for maximum bond strength\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Newton Waterproofing","offers":[{"title":"Default Title","offer_id":57212155003212,"sku":"BM06079","price":115.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/newton-waterproofing-newton-hydrobond-2k-flex-bitumen-waterproofing-membrane-1232467333.png?v=1776255648"},{"product_id":"visqueen-radon-r400-membrane-4m-x-25m-100sqm","title":"Visqueen Radon R400 Membrane","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eVisqueen Radon R400 Membrane is a flexible 0.4mm thick (1600 gauge) thermoplastic membrane manufactured from virgin polymer. The membrane is red in colour and supplied in 4m x 20m multi-folded rolls.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe membrane complies with BBA regulations for radon protection membranes and conforms to BR 211:2023 industry guidance for radon protection. It also provides damp proof membrane protection, making it a dual purpose radon and moisture protection solution for use under concrete ground floor slabs and screeds.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eProvides damp proof membrane protection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eRed colour for easy site identification\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eCE and UKCA marked\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVisqueen Radon R400 Membrane should be stored horizontally, under cover in its original packaging.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVisqueen Radon R400 Membrane should be installed on a smooth continuous surface e.g. grouted beam and block floor, a compacted blinding layer e.g. 50mm thick sand blinding, or smooth concrete blinding. The substrate should be free from irregularities such as voids or protrusions.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVisqueen Radon R400 Membrane should be loose laid on the substrate. The membrane should be clean and dry at\u003cbr\u003ethe time of jointing. Joints should be overlapped by at least 150mm, bonded with VisqueenPro Double Sided Tape and sealed with either VisqueenPro Single Sided Tape or Visqueen NF-60 Lap Tape.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301784822092,"sku":"BMD10885","price":174.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-membranes-visqueen-radon-r400-membrane-4m-x-20m-80m2-1233883877.jpg?v=1776866071"},{"product_id":"visqueen-gas-barrier-2m-x-50m-100m2","title":"Visqueen Gas Barrier","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eVisqueen Gas Barrier is a multi-layer reinforced polyethylene gas barrier membrane incorporating a 20 micron aluminium foil core, providing highly effective protection against methane, carbon dioxide, radon and other ground gases. The membrane is blue on the upper surface and silver on the reverse, and is supplied in single wound (not folded) rolls measuring 2m x 50m.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe membrane complies with the methane gas transmission rate, mass per unit area and thickness requirements of BS 8485:2015+A1:2019 for methane and carbon dioxide protection, and with NHBC Foundation's NF94 guidelines for use in Type A membrane locations. It also provides radon and damp proof membrane protection.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eMulti-layer reinforced polyethylene gas barrier with 20 micron aluminium foil\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eMethane and CO2 protection to BS 8485:2015+A1:2019\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAlso provides radon and damp proof membrane protection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eBBA Agrement certified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis product \u003cspan style=\"text-decoration: underline;\"\u003emust not\u003c\/span\u003e come into direct contact with uncured concrete or screed due to the aluminium foil core.\u003c\/li\u003e\n\u003cli\u003eLap joints can be taped or heat welded\u003c\/li\u003e\n\u003cli\u003eVisqueen Gas Barrier should be installed on a smooth continuous surface e.g. grouted beam and block floor, a compacted blinding layer e.g. 50mm thick sand blinding, or smooth concrete blinding.\u003c\/li\u003e\n\u003cli\u003eWhen installing the barrier in demanding site conditions, or where specified, use Visqueen NF-150 Lap Tape (in conjunction with the double sided tape) to seal the lap.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301784789324,"sku":"BMD10882","price":417.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-membranes-visqueen-gas-barrier-2m-x-50m-roll-100m2-1233883878.jpg?v=1776866090"},{"product_id":"visqueen-low-permeability-gas-membrane-4m-x-125-50sqm","title":"Visqueen Low Permeability Gas Membrane","description":"\u003cp\u003e\u003cspan\u003eUsed as a high performance radon membrane and\/or damp proof membrane positioned within the ground floor construction either above or below the structural floor slab.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCentre folded so limits creases and reduces the risk of cracks in screed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFlexible, making it easier to install\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBBA certified\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eComplies with NHBC Foundation’s NF94 guidance for use in Type A and Type B membrane locations in reinforced cast in situ suspended floor slabs and rafts\u003c\/li\u003e\n\u003cli\u003eComplies with NHBC Amber 1 - suitable for low gas risk NHBC housing sites\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLap joints can be taped or heat welded \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eActs as a radon and damp proof membrane \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLarge coverage of 50m²\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eShould be installed on a smooth continuous substrate free from irregularities such as voids or irregularities\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMembrane should be clean \u0026amp; dry at the time of jointing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eShould overlapped by at least 150mm, bonded with Visqueen pro double sided jointing tape and sealed with Visqueen foil lap tape.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAirtight seals should be formed around all service entry points\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIf the membrane is punctured or perforated a patch of the same material should be lapped at least 150mm beyond the limits of the puncture and either heat welded or bonded with Visqueen Pro Double Sided Jointing Tape and sealed with Visqueen Foil Lap Tape\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLong periods of exposure to ultraviolet light will reduce the effectiveness of the membrane. The membrane should be covered by a protective layer immediately after installation to prevent damage.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA minimum thickness of 50mm screed is recommended.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDo not install in temps below 5°C\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301784985932,"sku":"BMD10884","price":176.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-membranes-visqueen-low-permeability-gas-membrane-4m-x-12-5-50m-1233883880.jpg?v=1776866030"},{"product_id":"visqueen-radon-sump-unit","title":"Visqueen Radon Sump","description":"\u003cp\u003eVisqueen Radon Sump is a pre-fabricated sump unit manufactured from moulded black ABS plastic, designed for use in radon protection systems where sub-floor depressurisation is required. The unit features four equidistant perimeter outlet ports along with a central outlet port for vertical pipework installation, providing flexible connectivity options to suit different installation configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with Visqueen RadonBlok membrane range\u003c\/li\u003e\n\u003cli\u003eMoulded black ABS plastic construction\u003c\/li\u003e\n\u003cli\u003eLightweight and easy to handle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFour equidistant perimeter outlet ports\u003c\/li\u003e\n\u003cli\u003eOne central outlet port for vertical pipework\u003c\/li\u003e\n\u003cli\u003eFor use where full radon sub-floor depressurisation is required\u003c\/li\u003e\n\u003cli\u003eCompatible with Visqueen RadonBlok membrane range\u003c\/li\u003e\n\u003cli\u003eThe sump is installed below the ground floor slab and connected to pipework that vents radon gas to the atmosphere, either passively or via a mechanical fan.\u003c\/li\u003e\n\u003cli\u003eExcavate a minimum 750mm x 750mm x 350mm deep pit within the hardcore fill. For maximum depressurisation ensuring that the hardcore fill used does not contain excessive fines.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDo not connect the Visqueen Radon Sump to any part of the drainage system.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301785411916,"sku":"BM02417","price":76.87,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-visqueen-radon-sump-1233910831.jpg?v=1776872834"},{"product_id":"visqueen-ultimate-radonblok-400-4m-x-25m-100m2","title":"Visqueen Ultimate RadonBlok 400","description":"\u003cp\u003eVisqueen RadonBlok 400 is a flexible 0.4mm thick thermoplastic radon barrier membrane manufactured from virgin polymer. The membrane is purple in colour for easy site identification and supplied in centre folded rolls measuring 4m x 25m. Other sizes and formats including single wound rolls are available on request.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRadon protection to BR 211:2023\u003c\/li\u003e\n\u003cli\u003eAlso provides damp proof membrane protection\u003c\/li\u003e\n\u003cli\u003eCE and UKCA marked\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePurple colour for easy site identification\u003c\/li\u003e\n\u003cli\u003eManufactured from virgin polymer\u003c\/li\u003e\n\u003cli\u003eLap joints can be taped or heat welded\u003c\/li\u003e\n\u003cli\u003eVisqueen RadonBlok 400 should be loose laid on the substrate. The membrane should be clean and dry at the time of jointing. It should be overlapped by at least 150mm, bonded with Visqueen RadonBlok Double Sided Tape and sealed with Visqueen Pro Single Sided Tape.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301785903436,"sku":"BM011482","price":347.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-visqueen-ultimate-radonblok-400-1233883869.jpg?v=1776865970"},{"product_id":"visqueen-ultimate-radonblok-600-2m-x-25m-100m2","title":"Visqueen Ultimate RadonBlok 600","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eVisqueen RadonBlok 600 is a flexible 0.6mm thick thermoplastic radon barrier membrane manufactured from virgin polymer. The membrane is purple in colour for easy site identification and supplied in single wound rolls measuring 2m x 25m.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe membrane conforms to BR 211:2023 industry guidance for radon protection and complies with NHBC Foundation NF94 guidance for radon protection in Type A, Type B and Type C membrane locations. It also provides damp proof membrane protection, making it a dual purpose radon and moisture protection solution for use under concrete ground floor slabs and screeds.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eRadon protection to BR 211:2023\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNHBC Foundation NF94 compliant  Type A, B and C radon membrane locations\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAlso provides damp proof membrane protection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eCE and UKCA marked\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eManufactured from virgin polymer\u003c\/li\u003e\n\u003cli\u003eLap joints can be taped or heat welded\u003c\/li\u003e\n\u003cli\u003ePurple colour for easy site identification\u003c\/li\u003e\n\u003cli\u003eVisqueen RadonBlok 600 should be installed on a smooth continuous surface e.g. grouted beam and block floor, a compacted blinding layer e.g. 50mm thick sand blinding, or smooth concrete blinding. The substrate should be free from irregularities such as voids or protrusions.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301785936204,"sku":"BM005473","price":240.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-visqueen-ultimate-radonblok-600-1233883906.jpg?v=1776865872"},{"product_id":"visqueen-gas-barrier-nf-400-2-4m-x-43-5m-x-400-micron","title":"Visqueen Gas Barrier NF-400","description":"\u003cp\u003eVisqueen Gas Barrier NF-400 is a co-extruded, multi-layer thermoplastic gas membrane 0.4mm thick (400 micron). The membrane is transparent with a blue tint, allowing a clear view of the substrate during and after installation. Supplied in single wound rolls measuring 2.4m x 43.5m. Provides a multi-functional ground gas and moisture protection in a single product.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMethane and CO2 protection to BS 8485:2015+A1:2019\u003c\/li\u003e\n\u003cli\u003eNHBC Foundation NF94 compliant — Type A membrane location\u003c\/li\u003e\n\u003cli\u003eAlso acts as radon and damp proof membrane\u003c\/li\u003e\n\u003cli\u003eBBA Agrement certified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTransparent with blue tint for substrate visibility\u003c\/li\u003e\n\u003cli\u003eLap joints can be taped or heat welded\u003c\/li\u003e\n\u003cli\u003eVisqueen Gas Barrier NF-400 should be installed on a smooth continuous surface e.g. grouted beam and block floor, a compacted blinding layer e.g. 50mm thick sand blinding, or smooth concrete blinding. The substrate should\u003cbr\u003ebe free from irregularities such as loose aggregates or other sharp protrusions, voids, projections or mortar deposits.\u003c\/li\u003e\n\u003cli\u003eStore in a cool dry place away from direct sunlight\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301786100044,"sku":"BM02419","price":466.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-visqueen-gas-barrier-nf-400-1233883885.jpg?v=1776865830"},{"product_id":"visqueen-gas-barrier-nf-500-2-4m-x-43-5m-x-500-micron","title":"Visqueen Gas Barrier NF-500","description":"\u003cp\u003eVisqueen Ultimate Gas Barrier NF-500 is a co-extruded, multi-layer thermoplastic VOC and gas barrier membrane 0.5mm thick (500 micron). The membrane is transparent with a green tint, distinguishing it from the NF-400 (blue tint), and is supplied in single wound rolls measuring 2.4m x 43.5m.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMethane and CO2 protection to BS 8485:2015+A1:2019\u003c\/li\u003e\n\u003cli\u003eVOC protection to CIRIA C748:2014\u003c\/li\u003e\n\u003cli\u003eNHBC Foundation NF94 compliant — Type A and Type B membrane locations\u003c\/li\u003e\n\u003cli\u003eAlso acts as radon and damp proof membrane\u003c\/li\u003e\n\u003cli\u003eBBA Agrement certified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTransparent with green tint\u003c\/li\u003e\n\u003cli\u003eStore in cool dry place away from direct sunlight \u003c\/li\u003e\n\u003cli\u003eLap joints can be taped or heat welded\u003c\/li\u003e\n\u003cli\u003eThe barrier can be positioned above or below reinforced cast in situ concrete floor slabs e.g. ground bearing, suspended or raft, or above precast suspended segmental subfloors, e.g. beam and block floor.\u003c\/li\u003e\n\u003cli\u003eVisqueen Ultimate Gas Barrier NF-500 should be installed on a smooth continuous surface e.g. grouted beam and block floor, a compacted blinding layer e.g. 50mm thick sand blinding, or smooth concrete blinding. The substrate should be free from irregularities such as loose aggregates or other sharp protrusions, voids, projections or mortar deposits\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301786132812,"sku":"BM02420","price":828.57,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-visqueen-gas-barrier-nf-500-1233883884.jpg?v=1776865848"},{"product_id":"visqueen-ulitmate-gas-dpc-900mm-x-20m","title":"Visqueen Ulitmate Gas DPC","description":"\u003cp\u003eVisqueen Ultimate Gas DPC is a 0.5mm thick flexible 7-layer co-extruded film providing VOC and ground gas resistance for use as a damp proof course and cavity tray in masonry construction on sites where gas protection is required. The DPC has an embossed\/debossed finish, is coloured gold\/white and can be installed with either surface facing upwards. It is ideal for sites where multiple gas hazards are present.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBS 8485:2015+A1:2019 methane and CO2 compliant\u003c\/li\u003e\n\u003cli\u003eProtection against radon, carbon dioxide, methane and VOCs\u003c\/li\u003e\n\u003cli\u003eCIRIA C748:2014 VOC compliant\u003c\/li\u003e\n\u003cli\u003eSupplied in 20m rolls in 500mm, 600mm, 750mm and 900mm widths\u003c\/li\u003e\n\u003cli\u003e7 layers to make 0.5mm thickness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCan be installed with either surface facing upwards\u003c\/li\u003e\n\u003cli\u003eLap joints can be taped or heat welded\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Visqueen","offers":[{"title":"500mm","offer_id":57345869840716,"sku":"BM009676","price":160.9,"currency_code":"GBP","in_stock":true},{"title":"600mm","offer_id":57345869873484,"sku":"BM02424","price":193.09,"currency_code":"GBP","in_stock":true},{"title":"750mm","offer_id":57345869906252,"sku":"BM02425","price":241.36,"currency_code":"GBP","in_stock":true},{"title":"900mm","offer_id":57345869939020,"sku":"BM02426","price":289.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-visqueen-ulitmate-gas-dpc-1233883886.jpg?v=1776865710"},{"product_id":"visqueen-gr-self-adhesive-membrane-1m-x-20m","title":"Visqueen Gas Resistant Self Adhesive Membrane","description":"\u003cp\u003eVisqueen Gas Resistant Self Adhesive Membrane is a foil lined modified bitumen rubber membrane with a self-adhesive coating protected by a removable polyethylene release film. The upper surface is silver and the membrane is supplied in rolls of 1m x 20m.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType A waterproofing to BS 8102:2022\u003c\/li\u003e\n\u003cli\u003eMethane and CO2 protection to BS 8485:2015+A1:2019\u003c\/li\u003e\n\u003cli\u003eAlso provides radon and DPM protection\u003c\/li\u003e\n\u003cli\u003eBBA Agrement certified\u003c\/li\u003e\n\u003cli\u003eA multi-functional solution for sites where both waterproofing and gas protection are required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSilver upper surface\u003c\/li\u003e\n\u003cli\u003eSelf adhesive - no need for jointing tape\u003c\/li\u003e\n\u003cli\u003eEPD available\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301787017548,"sku":"BM008772","price":332.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-visqueen-gas-resistant-self-adhesive-membrane-1233883891.jpg?v=1776865693"},{"product_id":"visqueen-liquid-gas-membrane-12-5l","title":"Visqueen Liquid Gas Membrane","description":"\u003cp\u003eVisqueen Liquid Gas Membrane is a blue-grey single component polymer modified emulsion that dries to form a black flexible membrane providing damp proof, gas proof and waterproof protection. Unlike sheet membranes, the liquid applied system creates a seamless, fully bonded barrier with no lap joints, and is self-terminating at the perimeter of the installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType A waterproofing to BS 8102:2022\u003c\/li\u003e\n\u003cli\u003eMethane and CO2 protection to BS 8485:2015+A1:2019\u003c\/li\u003e\n\u003cli\u003eRadon protection to BR 211:2023\u003c\/li\u003e\n\u003cli\u003eSeamless fully bonded application — no lap joints\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for damp surfaces and green concrete\u003c\/li\u003e\n\u003cli\u003eApplied by brush or roller as a single component system — no mixing required.\u003c\/li\u003e\n\u003cli\u003ePaint on blue - dries in black to ensure you have covered all areas\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301787181388,"sku":"BM02427","price":291.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-visqueen-liquid-gas-membrane-1233883895.jpg?v=1776865669"},{"product_id":"powerbase-voc-membrane","title":"Powerbase VOC Membrane","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePowerbase VOC is an innovative multilayered barrier membrane comprising protective polymeric layers on both sides of a hydrocarbon and chemical resistant inner core. It provides exceptional resistance to volatile organic compounds (VOCs) and harmful gases including hydrocarbons, methane, radon and carbon dioxide, making it the specification choice for developments on brownfield sites or contaminated land where protection against a broad spectrum of toxic vapours and gases is required.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eIndependently tested to ISO 15105-2 and compliant with BS 8485:2015+A1:2019. Supplied in extra-wide 3m x 50m rolls, offering labour savings on site due to fewer overlaps required compared to standard width membranes. Also functions as a damp proof membrane.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eProtection against VOCs, hydrocarbons, methane, radon and CO2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eSpecifically designed for brownfield and contaminated land developments\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eSupplied in an extra wide 3m roll \u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eMultilayered barrier with hydrocarbon and chemical resistant inner core\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePOWERBASE VOC membranes are joined by conventional thermal (hot air\/wedge) welding equipment to provide overlapped seams for optimum barrier integrity.\u003c\/li\u003e\n\u003cli\u003e The membranes can be overlapped and joined using POWERBOND sealing and jointing self-adhesive tapes.\u003c\/li\u003e\n\u003cli\u003eEnsure no risk of puncture or abrasion on surface before laying membrane \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITP","offers":[{"title":"Default Title","offer_id":57398957015372,"sku":"BM06270","price":878.92,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/itp-powerbase-voc-membrane-1234664935.jpg?v=1777369633"},{"product_id":"powerbase-low-perm","title":"Powerbase Low Perm","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eLow Perm is a robust 500 micron gas barrier membrane designed to protect buildings against radon and low levels of methane and carbon dioxide. Independently tested to ISO 15105-1, it achieves excellent permeation resistance across all three gases, with permeation rates of 216 ml\/m²\/day for methane, 952 ml\/m²\/day for CO2 and 7.2 x 10⁻¹² m²\/s for radon, making it a reliable choice for sites where basic gas protection measures are required.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eBBA certified and compliant with NHBC gas protection measures for Green and Amber 1 sites. Also provides damp proof membrane protection. Yellow in colour for easy site identification. Supplied in 4m x 20m rolls.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cb\u003eImportant note; \u003c\/b\u003ewhere higher levels of methane or CO2 protection are required, or where VOC or hydrocarbon protection is needed, Powerbase Multigas or Powerbase VOC should be specified instead.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e500 micron gas barrier membrane for radon and low-level methane and CO2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITP","offers":[{"title":"Default Title","offer_id":57399017308492,"sku":"BM06271","price":87.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/itp-powerbase-low-perm-1234677229.jpg?v=1777376910"},{"product_id":"powerbase-multigas","title":"Powerbase Multigas","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePowerbase Multigas is a premium multilayer reinforced LDPE gas barrier membrane engineered to provide durable and reliable protection against radon, methane and carbon dioxide for buildings on sites with moderate to high gas risk. The membrane has high tear and impact resistance and also provides damp proof membrane protection. Green\/silver in colour. CE marked. Supplied in 2m x 50m rolls.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePowerbase Multigas 300 is independently tested to ISO 15105-1 and compliant with BS 8485:2015, achieving a methane permeation rate of 0.07 ml\/m²\/day. NHBC Green, Amber 1 and Amber 2 compliant.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePowerbase Multigas 500 is the higher specification grade, BBA certified and compliant with BS 8485:2015+A1:2019. NHBC Green, Amber 1 and Amber 2 compliant. CE marked.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePremium multilayer reinforced LDPE gas barrier membrane\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eProtection against radon, methane and carbon dioxide\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eMethane permeation 0.07 ml\/m²\/day\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNHBC Green, Amber 1 and Amber 2 compliant\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAlso provides damp proof membrane protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCE marked\u003c\/li\u003e\n\u003cli\u003eMultigas 300, independently tested to ISO 15105-1, BS 8485:2015 compliant\u003c\/li\u003e\n\u003cli\u003eMultigas 500, BBA certified, BS 8485:2015+A1:2019 compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e","brand":"ITP","offers":[{"title":"Multigas 300","offer_id":57399103062348,"sku":"BM06272","price":259.9,"currency_code":"GBP","in_stock":true},{"title":"Multigas 500","offer_id":57399103095116,"sku":"BM06273","price":328.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/itp-powerbase-multigas-1234677226.jpg?v=1777376893"},{"product_id":"rhinoplast-ultra-radon-barrier","title":"Rhinoplast Ultra Radon Barrier","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eRhinoplast Ultra Radon Barrier is a 300 micron (1200 gauge) monolithic LDPE membrane designed primarily for protection against radon gas in both basic and full radon protection areas. Manufactured from virgin grade LDPE, the membrane provides reliable radon protection and also acts as a damp proof membrane to protect against moisture ingress from the ground. Grey in colour. \u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe membrane complies with BR 211:2023 guidance for radon protection and is CE marked. Positioned loose lay within the ground floor construction, above or below the structural floor slab. Lap joints can be taped using Rhinoplast LT Jointstrip and girth tape. Preformed accessories including top hats, corners and vent cloaks are available to simplify complex details. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBR 211:2023 compliant\u003c\/li\u003e\n\u003cli\u003eAlso provides DPM protection\u003c\/li\u003e\n\u003cli\u003eCE marked\u003c\/li\u003e\n\u003cli\u003eSupplied in 15m and 20m lengths \u003c\/li\u003e\n\u003cli\u003eMulti folded \u003c\/li\u003e\n\u003cli\u003eCE marked for water proofing to harmonised standard EN13967:2012+A1:2017\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLoose lay installation above or below structural floor\u003c\/li\u003e\n\u003cli\u003eCold applied taped installation system\u003c\/li\u003e\n\u003cli\u003ePreformed accessories available\u003c\/li\u003e\n\u003cli\u003eThe product to be rolled flat with no folds or creases over the main surface area.\u003c\/li\u003e\n\u003cli\u003eAll lap joints to be completed as works proceed lapping at least 150mm.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Principal Building Products","offers":[{"title":"15m","offer_id":57483127488844,"sku":"BM006107","price":45.0,"currency_code":"GBP","in_stock":true},{"title":"20m","offer_id":57483127521612,"sku":"SD00127","price":57.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/principal-building-products-rhinoplast-ultra-radon-barrier-1237044190.png?v=1778147114"},{"product_id":"rhinoplast-super-gas-barrier","title":"Rhinoplast Super Gas Barrier","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eRhinoplast Super Gas is a high performance 400 micron monolithic hybrid co-polymer gas barrier membrane providing protection against radon and low level ground gases in both basic and full radon protection areas. Manufactured from virgin grade hybrid co-polymers, the membrane has high resistance to damage and puncturing and also provides damp proof membrane protection. Yellow in colour. Available in 4m x 20m centre folded or 2m x 40m unfolded rolls.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe membrane conforms to NHBC guidance and meets the requirements of BR 211:2023 for radon and Amber 1 gas protection. Suitable for NHBC Amber 1 designated low gas risk housing sites where a gas membrane is used above a well-ventilated sub-floor void. CE marked for waterproofing to EN 13967:2012+A1:2017. Lap joints can be taped or heat welded, heat welding must be carried out by a suitably skilled and qualified tradesperson. Preformed accessories available\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eRadon and Amber 1 ground gas protection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNHBC Amber 1 compliant for low gas risk housing sites\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAlso provides DPM protection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAvailable in 4m x 20m centre folded or 2m x 40m unfolded\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePreformed accessories available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe product to be rolled flat with no folds or creases over the main surface area.\u003c\/li\u003e\n\u003cli\u003eAll lap joints to be completed as works proceed lapping at least 150mm\u003c\/li\u003e\n\u003cli\u003eRobust to install above and below structural floor\u003c\/li\u003e\n\u003cli\u003eSuitable for line out installations to cover the entire footprint of the building to reduce joints.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Principal Building Products","offers":[{"title":"4m x 20m","offer_id":57483846353228,"sku":"BM000987","price":125.0,"currency_code":"GBP","in_stock":true},{"title":"2m x 40m","offer_id":57483846385996,"sku":"BM011029","price":125.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/principal-building-products-rhinoplast-super-gas-barrier-1237064973.png?v=1778154851"},{"product_id":"rhinoplast-evolution-gas-barrier","title":"Rhinoplast Evolution Gas Barrier","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eRhinoplast Evolution is a high specification co-extruded multi-layer gas barrier membrane developed using the latest co-extrusion technology. At 0.4mm thick, it consists of fourteen layers including two layers of EVOH gas barrier polymer encased in polyethylene outer layers. This construction provides outstanding protection against volatile organic compounds, hydrocarbons, methane, radon and carbon dioxide without the need for aluminium foil or reinforcement, allowing the membrane to be installed in direct contact with concrete without risk of corrosion. Purple in colour. Single wound to achieve a flat surface, with coverage of 100m² per roll.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eDesigned for loose-laid applications, Rhinoplast Evolution is suitable for full line-out installations or in combination with the Evolution Gas DPC. It can be positioned above or below concrete ground floor slabs and above precast suspended segmental ground floor systems such as beam and block floors. Compliant with BS 8485:2015+A1:2019 and incorporates the performance guidance of CIRIA C748:2014. BBA approved. NHBC Amber 1 and Amber 2 compliant. CE marked for waterproofing to EN 13967:2012+A1:2017. Suitable for all characteristic Gas Situation (CS) ground gas regimes. Also provides damp proof membrane protection. A fully integrated system of components including tapes, protection fleece, preformed corners, top hats and gas resistant DPC is available.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e14 layers - high specification\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eTwo layers of EVOH gas barrier \u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eBBA approved\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNo aluminium foil, safe for direct contact with concrete\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAlso provides DPM protection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eExcellent welding characteristics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle wound to achieve a flat surface\u003c\/li\u003e\n\u003cli\u003eDesigned for loose laid applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Principal Building Products","offers":[{"title":"Default Title","offer_id":57484049285452,"sku":"SD00131","price":382.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/principal-building-products-rhinoplast-evolution-gas-barrier-1237074895.png?v=1778161512"},{"product_id":"rhinoplast-evolution-hd-gas-barrier","title":"Rhinoplast Evolution HD Gas Barrier","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eRhinoplast Evolution HD is the highest specification product in the Rhinoplast gas barrier range — a heavy duty chemically resistant co-extruded multi-layer gas barrier membrane developed using the latest co-extrusion technology. At 0.6mm thick, it consists of fourteen layers including two layers of EVOH gas barrier polymer encased in high-density polyethylene (HDPE) outer layers. The HDPE construction provides superior robustness and chemical resistance compared to the standard Evolution, making it the specification choice for the most challenging sites contaminated by volatile organic compounds, hydrocarbons and ground gases. Brown in colour. Single wound to provide a flat, even surface. Coverage 50m² per roll at 1.65m x 30.5m.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eDesigned for loose-laid applications, the Evolution HD is suitable for full line-out installations or in combination with the Evolution Gas DPC. It can be positioned above or below concrete ground floor slabs, above precast suspended segmental ground floor systems such as beam and block floors, or within the ground beneath floor constructions. The system is adaptable with venting layers and can be installed using sealing tapes or fully welded for VOC applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eLike the standard Evolution, the HD membrane contains no aluminium foil or reinforcement, allowing it to be installed in direct contact with concrete without risk of corrosion. Compliant with BS 8485:2015+A1:2019 and incorporates the performance guidance of CIRIA C748:2014. NHBC Amber 1 and Amber 2 compliant. Follows NHBC Foundation NF94 guidance for Type A, B and C membrane locations. Fully compliant with BR 211:2023. CE marked for waterproofing to EN 13967:2012+A1:2017. Suitable for all characteristic Gas Situation (CS) ground gas regimes. Also provides damp proof membrane protection.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eTwo layers of EVOH gas barrier polymer\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eHDPE outer layers for superior robustness and chemical resistance\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eProtection against VOCs, hydrocarbons, methane, radon and CO2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eSuitable for fully welded systems\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAlso provides DPM protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHighest specification in the Rhinoplast range\u003c\/li\u003e\n\u003cli\u003eSuitable for all CS ground gas regimes\u003c\/li\u003e\n\u003cli\u003eFollows NHBC Foundation’s NF94 guidance for use in Type A, Type B and Type C membrane locations\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSufficiently durable to remain serviceable for the anticipated life of the building and duration of gas emissions.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Principal Building Products","offers":[{"title":"Default Title","offer_id":57484318409036,"sku":"BM004423","price":345.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/principal-building-products-rhinoplast-evolution-hd-gas-barrier-1237080088.png?v=1778168792"},{"product_id":"rhinoplast-evolution-gas-dpc","title":"Rhinoplast Evolution Gas DPC","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Rhinoplast Evolution Gas DPC is a high-specification multi-layer damp proof course from Principal Building Products, specifically developed for use on brownfield and contaminated construction sites where a standard DPC is not adequate. It is designed to be built into perimeter cavity and load bearing walls as part of a complete Rhinoplast gas barrier membrane system, bridging the wall construction and the below-slab membrane to create a continuous gas-tight envelope around the building.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eUnlike traditional bitumen or pitch-based DPCs, the Evolution Gas DPC contains no hazardous materials and will not extrude under load. Its fourteen-layer co-extruded construction incorporates two layers of ethylene vinyl alcohol co-polymer (EVOH), giving it exceptional resistance to methane, radon, carbon dioxide, VOCs and hydrocarbons. The embossed surface finish aids lap jointing, and installation can be completed using sealing tapes or heat welding.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eCE marked to EN 14909:2012 Type A, the product meets all guidance in BS 8485:2015+A1:2019 (Table 7) and CIRIA C748, and is suitable for all characteristic Gas Situation (CS) ground gas regimes including NHBC Amber 1 and Amber 2. Preformed internal and external corners, top hat collars for pipe penetrations and ancillary tapes are available to complete the system.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e14 layers with no hazardous pitch or bitumen\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWill not extrude under load\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eFlexible \u0026amp; easy to install\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eLap joints can be taped or heat sealed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDeveloped for brown field and contaminated sites\u003c\/li\u003e\n\u003cli\u003eDesigned to be built into the perimeter cavity and load bearing walls a part of a gas barrier membrane system.\u003c\/li\u003e\n\u003cli\u003eResits moisture as well as VOC's Hydrocarbons, Methane Radon and CO²\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Principal Building Products","offers":[{"title":"300mm","offer_id":57715115327820,"sku":"BM06610","price":68.57,"currency_code":"GBP","in_stock":true},{"title":"450mm","offer_id":57715115360588,"sku":"BM06611","price":102.86,"currency_code":"GBP","in_stock":true},{"title":"500mm","offer_id":57715115393356,"sku":"BM06612","price":114.29,"currency_code":"GBP","in_stock":true},{"title":"600mm","offer_id":57715115426124,"sku":"BM06613","price":137.14,"currency_code":"GBP","in_stock":true},{"title":"750mm","offer_id":57686535307596,"sku":"BM06299","price":171.43,"currency_code":"GBP","in_stock":true},{"title":"900mm","offer_id":57715115458892,"sku":"BM06614","price":205.71,"currency_code":"GBP","in_stock":true},{"title":"1000mm","offer_id":57715115491660,"sku":"BM06615","price":228.57,"currency_code":"GBP","in_stock":true},{"title":"1200mm","offer_id":57715115524428,"sku":"BM06616","price":274.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/principal-building-products-750mm-rhinoplast-evolution-gas-dpc-1240878860.png?v=1780076595"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/collections\/NoviaRadonBarrierRoll.jpg?v=1776178471","url":"https:\/\/www.constructionsuppliesuk.co.uk\/collections\/gas-membranes.oembed?page=2","provider":"Construction Supplies UK","version":"1.0","type":"link"}