{"title":"Waterproof Breathable Membranes","description":"\u003cp\u003eWaterproof breathable membranes help protect roofs and walls from external moisture while allowing water vapour to escape from within the building structure. The right membrane depends on the application, required water resistance and vapour permeability, helping to manage moisture and reduce the risk of condensation within the construction.\u003c\/p\u003e\n\u003cp\u003eOur range includes breathable roofing membranes such as Tyvek Supro, roof and wall breather membranes from Novia's Black+ range, and fire-rated breather membranes for compatible wall and façade systems. These provide options for pitched roofs, timber frame walls and external façades.\u003c\/p\u003e\n\u003cp\u003eWhen choosing a membrane, consider its water-resistance classification, vapour permeability and suitability for the intended construction. Many products offer W1 resistance to water penetration, providing a secondary weather-resistant layer beneath roof coverings or behind external cladding.\u003c\/p\u003e","products":[{"product_id":"itp-flameout-breathe-fr","title":"ITP FlameOut Breathe FR Class B - All Sizes","description":"\u003cp\u003eFlameOut Breathe is a Euroclass B flame-retardant breather membrane specifically designed for use in high-rise buildings. It offers W1 water tightness, providing maximum protection against rainwater ingress. FlameOut Breathe ensures enhanced fire safety and effective water resistance, making it ideal for applications where both fire performance and moisture management are crucial. Its compliance with stringent fire safety standards makes it suitable for a range of building projects, particularly in environments where fire risks and weather exposure are significant concerns.\u003c\/p\u003e","brand":"ITP","offers":[{"title":"1.5m x 50m - per roll","offer_id":49203217531227,"sku":"49203217531227","price":117.8,"currency_code":"GBP","in_stock":true},{"title":"3m x 50m - per roll","offer_id":49203217563995,"sku":"49203217563995","price":243.56,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/breathefr.jpg?v=1725018183"},{"product_id":"novia-black-ultra-roof-wall-breather","title":"Novia Black \u0026 Ultra 102GSM Roof \u0026 Wall Breather - 1.5m x 50m","description":"\u003cp\u003eNovia® Black+ Ultra Roof and Wall Breather Membrane is a lightweight, versatile option suitable for both \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched\u003c\/a\u003e cold and warm roofs, as well as insulated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall \u003c\/a\u003eapplications. It meets the EN 13859-1 standard for pitched roofs and EN 13859-2 for walls, providing excellent water resistance while maintaining high breathability. It also complies with fire classification grade E under EN 13501-1. The membrane is black on one side, grey on the other, and features a 150mm overlap line with no additional text or images.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":48970209034587,"sku":"48970209034587","price":49.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Black_Ultimate2.jpg?v=1725615415"},{"product_id":"tyvek-supro","title":"Tyvek Supro Membrane - 1.5 x 50m","description":"\u003cp\u003eTyvek® Supro is a robust, water-resistant membrane reinforced with laminated polypropylene nonwoven. It provides airtight and vapour-permeable protection and is highly water-resistant, making it suitable for both supported and unsupported pitched roofs.\u003c\/p\u003e\n\u003cp\u003eThis membrane eliminates the need for soffit, tile, or ridge ventilation, which can streamline the construction process and reduce costs. Tyvek® Supro is versatile enough for use in warm, hybrid, and cold roof systems, as well as Scottish sarking board systems, low-pitched metal roofs, and various \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall\u003c\/a\u003e and \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/floor-insulation\" title=\"floor insulation\"\u003efloor\u003c\/a\u003e applications.\u003c\/p\u003e","brand":"Tyvek","offers":[{"title":"Default Title","offer_id":48971012702555,"sku":"48971012702555","price":168.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/tyvek-supro-plus-gi-1652442041-1667812506.jpg?v=1725628759"},{"product_id":"tyvek-uv-facade-tape","title":"Tyvek UV Facade Tape - All Sizes","description":"\u003cp\u003eTyvek® UV Façade Tape is a highly adhesive, weather-resistant tape designed for robust sealing of \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewalls\u003c\/a\u003e and \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/roof-insulation\" title=\"roof insulation\"\u003eroofs\u003c\/a\u003e. It offers excellent UV resistance.\u003c\/p\u003e","brand":"Tyvek","offers":[{"title":"75mm x 25m","offer_id":48971650728283,"sku":"48971617796443","price":34.4,"currency_code":"GBP","in_stock":true},{"title":"3m x 25m","offer_id":48971650761051,"sku":"48971617796444","price":103.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/dupont-tyvek-uv-facade-single-side-tape-roll_1.jpg?v=1725634613"},{"product_id":"tyvek-housewrap-breather-membrane-1-4m-x-100","title":"Tyvek HouseWrap Breather Membrane - 1.4m x 100m","description":"\u003cp\u003eDuPont™ Tyvek® Housewrap is a high-performance breathable membrane ideal for timber frame wall systems and can also be used with steel frame and concrete wall constructions. It is surface-applied directly to sheathing ply\/OSB, insulation, or blockwork, offering long-term protection from the elements. Made from high-density polyethylene fibres, this durable and lightweight membrane is both windtight and water-resistant. Tyvek® Housewrap is suitable for new builds, refurbishments, or extensions, providing effective protection against moisture while allowing the structure to breathe.\u003c\/p\u003e","brand":"Tyvek","offers":[{"title":"Default Title","offer_id":49004468797787,"sku":"49004468797787","price":123.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/dupont-tyvek-housewrap--100m-x-1-4m-roll_c9cfd3bf-ac97-4bac-ad0b-82a44eeff2b4.jpg?v=1726134572"},{"product_id":"novia-reflex-roof-and-wall-breather-1-5m-x-50m","title":"Novia Reflex Roof and Wall Breather - 1.5m x 50m","description":"\u003cp\u003eNovia® Reflex Roof and Wall Breather is a high-quality, durable, and versatile reflective breather membrane designed for use in both \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched\u003c\/a\u003e cold and warm roofs, as well as insulated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall\u003c\/a\u003e applications.\u003c\/p\u003e\n\u003cp\u003eWith an aged reflectivity of 81%, Novia® Reflex helps improve the U-value of a structure. When installed correctly, it can add an additional R-value of up to 0.45 m²K\/W in an unventilated wall cavity or 0.17 m²K\/W in an insulated sloping roof. Its reflective surface also helps keep buildings cooler in the summer and warmer in the winter.\u003c\/p\u003e\n\u003cp\u003eThe membrane offers tensile and nail tear strength, improving its durability during handling and installation, and minimising the risk of damage. Novia® Reflex has a reflective surface on one side and a plain white reverse side, featuring only a 150mm overlap line.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":49023718850907,"sku":"49023718850907","price":130.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Reflexroofandwallbreather.jpg?v=1726481040"},{"product_id":"novia-black-2-7m-construction-wrap-wall-breather","title":"Novia Black+ 2.7m Construction Wrap Wall Breather - 2.7m x 100mm","description":"\u003cp\u003eNovia® Black+ Construction Wrap Breather Membrane is a lightweight, versatile membrane designed for use in insulated wall applications, measuring 2.7m x 100m. It complies with EN 13859-1 for\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003e pitched roofing\u003c\/a\u003e and EN 13859-2 for \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewalls\u003c\/a\u003e, although it is not recommended for roofing due to its roll size. The membrane offers efficient water resistance while maintaining high breathability and meets EN 13501-1 fire classification grade E. It features a black surface on one side and grey on the reverse, with a 150mm overlap line but no additional text or markings.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":49023765348699,"sku":"49023765348699","price":197.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/constructionwrap.jpg?v=1726481174"},{"product_id":"novia-class-b-s1-d0-fr-breather-membrane","title":"Novia Class B-s1,d0 FR Breather Membrane - 1.5m x 50m","description":"\u003cp\u003eNovia® FR Roof and Wall Breather Membrane is a Class B-s1,d0* fire-rated, lightweight breather membrane designed for use in \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched\u003c\/a\u003e cold and warm roofs, as well as insulated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall \u003c\/a\u003eapplications. It is CE marked and complies with EN 13859-1 for pitched roofing and EN 13859-2 for walls, including high-rise buildings. The membrane offers Class W1 water resistance while maintaining high breathability. Made from 2-layer TPU, it also provides enhanced UV resistance. The Novia® FR Breather is black on one side, white on the reverse, and features a 150mm overlap line, with no additional text or images.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":49024820609371,"sku":"49024820609371","price":199.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/FRroofandbreathermembrane.jpg?v=1726480067"},{"product_id":"novia-black-supreme-125gsm-roof-and-wall-breather","title":"Novia Black+ Supreme 125gsm Roof and Wall Breather - All Sizes","description":"\u003cp\u003eNovia® Black+ Supreme Roof and Wall Breather Membrane is a durable and versatile membrane suitable for both \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched\u003c\/a\u003e roofs and insulated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall\u003c\/a\u003e applications. It meets the standards of EN 13859-1 for pitched roofing and EN 13859-2 for walls. The membrane offers excellent water resistance while maintaining high breathability. It is also classified as Fire Rating Class E under EN 13501-1. The membrane features a black side and a grey reverse, with a 150mm overlap line and no additional text or images.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"1m x 50m = 1 roll","offer_id":49025519944027,"sku":"49025519944027","price":41.57,"currency_code":"GBP","in_stock":true},{"title":"1.5m x 50m = 1 roll","offer_id":49025519976795,"sku":"49025519976795","price":58.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/supreme.jpg?v=1726485334"},{"product_id":"novia-black-pro-150gsm-roof-and-wall-breather","title":"Novia Black+ Pro 150GSM Roof and Wall Breather - All Sizes","description":"\u003cp\u003eNovia® Black+ Pro Roof and Wall Breather Membrane is a premium quality, heavy weight, strong and versatile breather membrane for all \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched \u003c\/a\u003ecold and warm roofs, as well as insulated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall\u003c\/a\u003e applications. The material meets EN 13859-1 for pitched roofing and EN 13859-2 for walls. Novia® Black+ Pro has excellent water resistance but still provides high breathability. It also complies with EN 13501-1 Fire Classification E. The product is completely black on one side, grey on the reverse, with no text or images, except for a 150mm overlap line.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"1m x 50m = 1 roll","offer_id":49025635877211,"sku":"49025635877211","price":47.02,"currency_code":"GBP","in_stock":true},{"title":"1.5m x 50m = 1 roll","offer_id":49025635942747,"sku":"49025635942747","price":73.17,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/constructionwrap_9b67aca4-2847-47de-8500-33b12ba2b17e.jpg?v=1726494212"},{"product_id":"novia-class-b-s1-d0-uv-facade-fr-breather-membrane","title":"Novia Class B-s1,d0 UV Facade FR Breather Membrane - 1.5m x 50m","description":"\u003cp\u003eNovia® FR Roof and Wall Breather Membrane is a high-performance, lightweight, and versatile breather membrane with a Class B-s1,d0* fire rating. It is suitable for all \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched\u003c\/a\u003e cold and warm roofs, as well as insulated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall\u003c\/a\u003e applications. CE marked, it complies with EN 13859-1 for pitched roofing and EN 13859-2 for walls, including high-rise buildings. The membrane features excellent Class W1 water resistance and high breathability. Constructed from a 2-layer TPU, it offers enhanced UV resistance. The membrane is black on one side and white on the reverse, with no text or images apart from a 150mm overlap line.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":49026338324827,"sku":"49026338324827","price":176.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/UV_Facade_image.png?v=1791887322"},{"product_id":"novia-mirrorwrap-w1-reflective-wall-breather","title":"Novia MirrorWrap W1 Reflective Wall Breather - 2.7m x 100mm","description":"\u003cp\u003eNovia® MirrorWrap W1 is a premium 4-layer laminate wall breather membrane designed for insulated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall\u003c\/a\u003e applications. It offers Class W1 water resistance and reflective properties. The product is CE certified and complies with EN 13859-2 for wall use, ensuring excellent water resistance (EN 1928 Class W1) while maintaining high breathability.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":49026759852379,"sku":"49026759852379","price":404.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/mirrorwrap.jpg?v=1726494437"},{"product_id":"kingspan-nilvent-breather-membrane-50m-x-1-5m","title":"Kingspan Nilvent Breather Membrane - 50m x 1.5m","description":"\u003cp\u003eNilvent is a breathable membrane designed for use in unventilated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched roof \u003c\/a\u003eand timber frame wall applications. It is fully waterproof, airtight under normal building pressures, and non-tenting, making it a reliable solution for protecting building envelopes while allowing moisture vapour to escape.\u003c\/p\u003e","brand":"Kingspan","offers":[{"title":"Default Title","offer_id":51034531365211,"sku":"51034531365211","price":130.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/nilvent.png?v=1753356056"},{"product_id":"novia®-black-essential-roof-and-wall-breather-membrane-1-5m-x-50m","title":"Novia® Black+ Essential Roof and Wall Breather Membrane - 1.5m x 50m","description":"\u003cp\u003eNovia® Black+ Essential Roof and Wall Breather Membrane is a lightweight, cost-effective breather membrane designed for general use in insulated wall constructions. It is fully compliant with EN 13859-2 for wall applications and also meets EN 13859-1 for \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched roofing\u003c\/a\u003e, making it suitable for a broad range of standard building projects.\u003c\/p\u003e\n\u003cp\u003eThe membrane provides W1-level water resistance while maintaining high breathability, helping to manage moisture effectively within the building envelope. It also achieves EN 13501-1 Class E fire performance.\u003c\/p\u003e\n\u003cp\u003eNovia® Black+ Essential is supplied black on one side and grey on the reverse, with a clean, unprinted finish.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":51805931700571,"sku":"51805931700571","price":39.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/NoviaEssentialBreather-use.png?v=1764160676"},{"product_id":"novia-black-construction-wrap-light-2-7m-x-100m","title":"Novia® Black+ Construction Wrap Light Breather Membrane - 2.7m x 100m","description":"\u003cp\u003eNovia® Black+ Construction Wrap Light Breather Membrane is a lightweight, three-layer wall breather membrane supplied in 2.7m x 100m rolls. It is designed for use in all insulated \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"wall insulation\"\u003ewall\u003c\/a\u003e applications, offering a balance of durability, breathability and ease of installation.\u003c\/p\u003e\n\u003cp\u003eThe membrane delivers Class W1 water resistance while maintaining high vapour permeability to help manage moisture within the building envelope. It is manufactured to meet EN 13859-2 for wall applications and also conforms to EN 13859-1 for \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pitched-roof-insulation\" title=\"pitched roof insulation\"\u003epitched roofing\u003c\/a\u003e, although the large roll width means it is intended primarily for wall use. The product also achieves EN 13501-1 Class E fire classification.\u003c\/p\u003e\n\u003cp\u003eNovia® Black+ Construction Wrap Light is supplied black on one side and grey on the reverse, presented in a clean, unprinted finish.\u003c\/p\u003e","brand":"Novia","offers":[{"title":"Default Title","offer_id":51835199848795,"sku":"51835199848795","price":172.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/NoviaBlack_ConstructionWrapLight-use.png?v=1764679812"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/collections\/breathefr.jpg?v=1793703213","url":"https:\/\/www.nationalinsulationsupplies.com\/collections\/waterproof-breathable-membranes.oembed","provider":"National Insulation Supplies","version":"1.0","type":"link"}