{"title":"Damp Proof Membranes (DPM)","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eA damp proof membrane (DPM) is a waterproof barrier installed beneath concrete floor slabs, screeds and foundations to prevent ground moisture, rising damp and water vapour from penetrating the floor construction. DPMs are a building regulation requirement in most ground floor construction, providing a continuous barrier between the ground and the floor structure above. They are used across new build housing, commercial construction, basement conversions, extensions and refurbishment projects wherever a concrete floor slab or screed is laid at or near ground level.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWithout an effective floor damp proof membrane, ground moisture can rise through a concrete slab and cause damage to floor finishes, insulation, structural timbers and the wider building fabric. A correctly installed DPM protects against moisture ingress for the life of the building.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePolythene damp proof membranes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePolythene sheet DPMs are the most widely used product for concrete floor slab applications. Laid either above or below the concrete slab, they provide a continuous physical barrier against ground moisture and soil gases penetrating the floor construction. Polythene DPMs are available in a range of thicknesses from 250 to 600 micron, with 1200 gauge (300 micron) being the standard specification for most residential floor slabs. Heavier gauges are specified for commercial applications and where the membrane is required to withstand greater loads or site conditions during the construction phase.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWhen installing a damp proof membrane beneath a concrete floor, sheets should be lapped a minimum of 150mm at all joints and sealed with DPM jointing tape to maintain a continuous seal. The membrane should be turned up at the perimeter and dressed into the wall damp proof course (DPC) to create a complete and unbroken moisture barrier across the floor and wall junction. Care should be taken to avoid puncturing the membrane during concrete pour.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePolythene DPMs are suitable for use in solid ground floors, basement floors, garage floors, extensions and sub-slab applications across residential and commercial construction. Products from Visqueen, Novia, Principle Building Products and ITP are available in rolls to cover large floor areas efficiently.\u003c\/p\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eLiquid applied and bituminous DPM\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eLiquid applied damp proof membranes provide an alternative to polythene sheet where a bonded, paint-on solution is required. Applied directly to a concrete base or sub-slab as a damp proof membrane paint or bituminous coating, liquid DPMs form a continuous waterproof film that bonds to the substrate and eliminates the risk of puncture during construction.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eBitumen damp proof membranes such as the Sika Black Jack 908 DPM are brush or roller applied directly to concrete floor slabs and foundations prior to insulation, screed or floor finishes. They are particularly suited to refurbishment and basement conversion projects where laying a sheet membrane is impractical due to existing construction, and to applications where the membrane needs to be applied to a concrete base before a new screed or insulated floor system is installed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eLiquid applied DPMs are also suitable for use beneath wood floor heating systems and insulated floor screeds, providing a reliable moisture barrier at the base of the floor build-up.\u003c\/p\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eChoosing the right DPM\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eFor most new build ground floor slab applications, a polythene sheet DPM from 250 to 600 micron is the standard and most cost-effective solution. For refurbishment or where the substrate is uneven, a liquid applied bituminous DPM paint offers greater flexibility and ease of application.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAll products in this range are suitable for applications where no hydrostatic water pressure is expected. Where ground water pressure is present, such as in below-ground basement construction, a Type A structural waterproofing membrane or Type C cavity drain system is required. See our Waterproofing Membranes and Tanking range for these applications.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose Construction Supplies UK for Damp Proof Membranes \u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePolythene and liquid applied DPM in one place:\u003c\/strong\u003e From 250 to 600 micron polythene sheet DPM to bituminous paint-on membranes, we stock solutions for ground floors, basement floors, garage floors and sub-slab applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eTrusted industry brands:\u003c\/strong\u003e Shop leading manufacturers including Visqueen, Novia, Sika, Principle Building Products and ITP, alongside our own Construction Supplies UK brand.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eCompetitive trade prices:\u003c\/strong\u003e Damp proof membranes supplied at competitive trade prices with no minimum order value.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eFast UK-wide delivery\u003c\/strong\u003e Reliable nationwide delivery with free shipping available on order over £300.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eExpert support when you need it\u003c\/strong\u003e Our team can help you choose the right DPM for your project. Get in touch @ \u003ca href=\"mailto:sales@constructionsuppliesuk.co.uk\" class=\"font-bold hover:text-underline\"\u003e\u003cstrong\u003esales@constructionsuppliesuk.co.uk\u003c\/strong\u003e\u003c\/a\u003e or call us on \u003cstrong\u003e\u003ca href=\"tel:03300%2055%2032%2002\" class=\"font-bold hover:text-underline\"\u003e03300 55 32 02\u003c\/a\u003e.\u003c\/strong\u003e\u003c\/p\u003e","products":[{"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":"bba-black-dpm","title":"Polythene Damp Proof Membrane","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eA BBA accredited polythene damp proof membrane designed to protect buildings from the passage of water and water vapour from the ground when installed to appropriate standards. Available in 250mu, 300mu and 500mu nominal thicknesses to suit different specification requirements, all at 4m wide. Available in single rolls from stock or in pallet quantities of forty rolls.\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 class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eBBA accredited — independently verified for performance and reliability\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eProtects buildings against ground water and water vapour ingress\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAvailable in three thicknesses — 250mu, 300mu and 500mu — to suit different specification requirements\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e4m wide rolls for efficient coverage with fewer joints\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAvailable in single rolls or pallet quantities for larger projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAvailable sizes: 4m x 25m (250mu \/ 23kg), 4m x 25m (300mu \/ 27.6kg), 4m x 12.5m (500mu \/ 23kg)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003ePallet quantity: 40 rolls\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAlways refer to the product data sheet and install to appropriate standards\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Construction Supplies UK","offers":[{"title":"4m x 25m (250mu)","offer_id":57127711899980,"sku":"BM001002","price":35.95,"currency_code":"GBP","in_stock":true},{"title":"4m x 25m (300mu)","offer_id":57127711932748,"sku":"BM001000","price":39.5,"currency_code":"GBP","in_stock":true},{"title":"4m x 12.5m (500mu)","offer_id":57127711965516,"sku":"BM001003","price":41.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/construction-supplies-uk-building-consumables-4m-x-25m-250mu-polythene-damp-proof-membrane-1232467562.png?v=1776257389"},{"product_id":"sika-black-jack-908-d-p-m","title":"Sika Black Jack 908 D.P.M.","description":"\u003cp\u003e\u003cspan\u003eEverbuild Black Jack 908 DPM is a rubber-enriched bitumen emulsion that provides a highly effective, ready-to-use damp proof membrane for a wide range of construction applications. The rubber enrichment provides improved flexibility and adhesion compared to standard bitumen emulsions. Primary uses include waterproofing bridge abutments, retaining walls, culverts, and concrete or brick foundations; as a DPC substitute in internal remedial damp-proofing; as an adhesive and bonding aid for wood block and mosaic flooring; and as a concrete curing agent. Water-based formula for low hazard, low odour use, clean tools with water.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRubber-enriched formula provides improved flexibility and adhesion over standard bitumen emulsions\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVersatile, suitable as a DPM, wood flooring adhesive, concrete curing agent and bonding aid in a single product\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLow hazard, water-based, low odour, easy water clean-up while uncured\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eReady to use, no mixing required\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInternal and external use\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eResistant to salt solutions, dilute acids and alkalis\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\u003eApply to clean, sound surfaces free from dust, loose material and grease\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFor DPC applications, use in conjunction with a physical DPC and consult a specialist if rising damp is severe\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFor wood block flooring: apply to partially dry state before placing blocks; allow 30–40 minutes depending on conditions\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDo not apply when rain is imminent, allow adequate drying time between coats\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDo not apply in freezing conditions, water-based emulsion will be destroyed by frost\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFor plaster over DPM application: leave a 300mm uncoated horizontal strip at the top of the wall to allow trapped moisture to escape\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sika","offers":[{"title":"5L","offer_id":57127714062668,"sku":"BM05805","price":32.43,"currency_code":"GBP","in_stock":true},{"title":"25L","offer_id":57127714095436,"sku":"BM010709","price":102.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/sika-sika-black-jack-908-d-p-m-1232467149.png?v=1776257111"},{"product_id":"visqueen-high-performance-dpm-4m-x-125m-x-500mu","title":"Visqueen High Performance DPM","description":"\u003cp\u003eVisqueen High Performance Damp Proof Membrane is a robust co-polymer thermoplastic membrane 0.5mm thick, yellow in colour and supplied in 4m x 12.5m centre folded rolls. The centre folded format reduces the risk of cracks in screed and limits creases during installation.\u003c\/p\u003e\n\u003cp\u003eThe membrane is sulphate resistant — when installed with heat welded joints it is suitable for use in aggressive ground conditions across DS classifications 1-5 in accordance with the Aggressive Chemical Environment for Concrete (ACEC) classification system, making it appropriate for sites with elevated sulphate or chemical ground conditions. Lap joints can be heat welded or taped using compatible Visqueen system components including VisqueenPro Double Sided Jointing Tape and VisqueenPro Single Sided Tape. BBA Agrement certified. CE and UKCA Declarations of Performance available. EPD available.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCentre folded to reduce screed cracking and installation creases\u003c\/li\u003e\n\u003cli\u003eSulphate resistant, suitable for DS classifications 1-5 per ACEC when heat welded\u003c\/li\u003e\n\u003cli\u003eBBA Agrement certified\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\u003eLap joints can be taped or heat welded\u003c\/li\u003e\n\u003cli\u003eVisqueen High Performance Damp Proof 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\u003cbr\u003eblinding. The substrate should be free from irregularities such as voids or protrusions.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVisqueen High Performance Damp Proof Membrane should be stored horizontally, under cover in its original packaging.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVisqueen High Performance Damp Proof Membrane should be loose laid on the substrate. The membrane should\u003cbr\u003ebe clean and dry at the time of jointing. It should be overlapped by at least 150mm, bonded with VisqueenPro Double Sided Jointing Tape and sealed with VisqueenPro Single Sided Tape.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAlternatively lap joints can be heat welded and this method of sealing laps must be employed when the membrane, is being used to protect against sulphates. When hot air hand welding the lap joints, the joint should be overlapped by approximately 100mm and an approximate 35mm weld is normally maintained. During hand welding, the lap joints should be firmly compressed using a hand roller to ensure an adequate bond is achieved.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Visqueen","offers":[{"title":"Default Title","offer_id":57301784854860,"sku":"BMD11598","price":167.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/visqueen-membranes-visqueen-high-performance-dpm-500mu-4m-x-12-5m-50m2-1233883876.jpg?v=1776866052"},{"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-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":"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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/collections\/DPM-BBA.png?v=1776246797","url":"https:\/\/www.constructionsuppliesuk.co.uk\/collections\/damp-proof-membranes-dpm.oembed","provider":"Construction Supplies UK","version":"1.0","type":"link"}