{"title":"Full Fill Cavity Wall Insulation","description":"\u003cp\u003eImprove the thermal performance of masonry cavity walls with our range of full fill cavity wall insulation. Designed to occupy the full width of the wall cavity, these insulation products help reduce heat loss, improve energy efficiency and support the construction of comfortable, well-insulated buildings.\u003c\/p\u003e\n\u003cp\u003eOur collection includes full fill insulation products suitable for a variety of residential, commercial and refurbishment projects. Available in a choice of thicknesses and thermal performances, they can be used in new-build cavity wall applications where a full fill insulation solution has been specified.\u003c\/p\u003e\n\u003ch2\u003eWhat Is Full Fill Cavity Wall Insulation?\u003c\/h2\u003e\n\u003cp\u003eFull fill cavity wall insulation is installed between the inner and outer leaves of a masonry cavity wall, filling the available cavity rather than leaving a residual air gap.\u003c\/p\u003e\n\u003cp\u003eThis allows builders and installers to maximise the amount of insulation within the wall construction while maintaining a practical overall wall thickness.\u003c\/p\u003e\n\u003cp\u003eDepending on the product and project requirements, full fill cavity insulation may be supplied as rigid boards, slabs or water-repellent mineral wool batts. Always check the individual product information, installation guidance and project specification before choosing an insulation material.\u003c\/p\u003e\n\u003ch2\u003eBenefits of Full Fill Cavity Insulation\u003c\/h2\u003e\n\u003cp\u003eUsing a suitable full fill cavity wall insulation product can provide several benefits:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHelps reduce heat loss through external masonry walls\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports improved building energy efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMakes effective use of the available cavity width\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan help achieve required thermal performance without unnecessarily increasing wall thickness\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvailable in different thicknesses for a range of cavity constructions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for many new-build residential and commercial developments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eShop Full Fill Insulation Products\u003c\/h2\u003e\n\u003cp\u003eExplore our selection of full fill cavity insulation from trusted manufacturers, including products designed to deliver reliable thermal performance and straightforward installation.\u003c\/p\u003e\n\u003cp\u003ePopular options within this collection include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/rockwool-full-fill-cavity-batt-all-thicknesses\" title=\"Rockwool Full Fill Cavity Batt\"\u003eRockwool Full Fill Cavity Batt\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/knauf-dritherm%C2%AE-cavity-slab-32-1200mm-x-455mm-all-thicknesses\" title=\"Knauf Dritherm® Cavity Slab 32\"\u003eKnauf Dritherm® Cavity Slab 32\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/knauf-dritherm-cavity-slab-34\" title=\"Knauf Dritherm Cavity Slab 34\"\u003eKnauf Dritherm Cavity Slab 34\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/knauf-dritherm-cavity-slab-37-1200mm-x-455mm-all-thicknesses\" title=\"Knauf Dritherm Cavity Slab 37\"\u003eKnauf Dritherm Cavity Slab 37\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/ursa-cavity-batt\" title=\"URSA CAVITY BATT 32\"\u003eURSA CAVITY BATT 32\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/ursa-cavity-batt-35-1350mm-x-455mm-all-thicknesses\" title=\"URSA CAVITY BATT 35\"\u003eURSA CAVITY BATT 35\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach product page includes further information about available thicknesses, board or slab dimensions, thermal conductivity and recommended applications.\u003c\/p\u003e\n\u003ch2\u003eChoosing the Right Full Fill Cavity Wall Insulation\u003c\/h2\u003e\n\u003cp\u003eWhen selecting full fill cavity wall insulation, consider the cavity width, required U-value, insulation thickness, wall construction and exposure conditions of the building.\u003c\/p\u003e\n\u003cp\u003eThe correct solution will depend on the architectural specification and the performance requirements of the project.\u003c\/p\u003e\n\u003cp\u003eYou should also confirm that the chosen product is suitable for full fill installation and compatible with the wall ties, masonry construction and installation method being used. Products should be installed in accordance with the manufacturer’s guidance and relevant building requirements.\u003c\/p\u003e\n\u003ch2\u003eRelated Insulation Products\u003c\/h2\u003e\n\u003cp\u003eFor alternative wall insulation solutions, browse our \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"Cavity Wall Insulation\"\u003ecavity wall insulation\u003c\/a\u003e, \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/partial-fill-cavity-wall-insulation\" title=\"Partial Fill Cavity Wall Insulation\"\u003epartial fill cavity insulation\u003c\/a\u003e and \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"Wall Insulation\"\u003ewall insulation\u003c\/a\u003e collections.\u003c\/p\u003e\n\u003cp\u003eOrder full fill cavity wall insulation online for delivery across the UK. Browse the products above to compare available sizes, thicknesses and thermal performance for your next building or insulation project.\u003c\/p\u003e","products":[{"product_id":"kingspan-kooltherm-k106-cavity-board-1200mm-x-450mm-all-thicknesses","title":"Kingspan Kooltherm K106 Cavity Board - 1200mm x 450mm - All Thicknesses","description":"\u003cp\u003eKingspan Kooltherm K106 offers top-tier performance as a full fill \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-ins\" title=\"cavity wall insulation\"\u003ecavity wall insulation,\u003c\/a\u003e featuring a 10mm residual cavity. With a low thermal conductivity of 0.019 W\/mK, it achieves the same U-value as competing products but with a slimmer profile. Its water-tight, vapour-open polypropylene fleece outer facing provides excellent protection against moisture infiltration.\u003c\/p\u003e","brand":"Kingspan","offers":[{"title":"90mm (4 Sheets = 2.16m²) - Per pack","offer_id":48120672125275,"sku":"48120672125275","price":90.5,"currency_code":"GBP","in_stock":true},{"title":"115mm (4 Sheets = 2.16m²) - Per pack","offer_id":48120672158043,"sku":"48120672158043","price":122.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/K-Rock106g3.jpg?v=1713884085"},{"product_id":"recticel-eurowall®-1200mm-x-460mm-all-thicknesses","title":"Recticel Eurowall+ (Full Fill Cavity Board) - 1200mm x 460mm - All Thicknesses","description":"\u003cp\u003eRecticel Eurowall® + is a premium, high-performance full-fill insulation board with precision-cut tongue and groove joints on all four sides. This ensures tight locking of the boards, minimising heat loss through thermal bridging. The unique joint design provides increased protection against wind-driven rain and improved wind tightness. Eurowall® + is also designed with a 10mm cavity requirement in mind, allowing space for conventional bricklaying techniques.\u003c\/p\u003e","brand":"Recticel","offers":[{"title":"90mm (10 boards. 5.4m²) - Per pack","offer_id":48222410473819,"sku":"48222410473819","price":120.2,"currency_code":"GBP","in_stock":true},{"title":"115mm (8 boards. 4.32m²) - Per pack","offer_id":48222410506587,"sku":"48222410506587","price":144.3,"currency_code":"GBP","in_stock":true},{"title":"140mm (8 boards. 4.32m²) - Per pack","offer_id":48222410539355,"sku":"48222410539355","price":165.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Eurowall_3_34140a81-fd64-4a22-afb6-a824681f0527.png?v=1721121618"},{"product_id":"ecotherm-full-fill-cavity-1200mm-x-450mm-all-thicknesses","title":"Ecotherm Eco-Cavity Full Fill - 1200mm x 450mm - All Thicknesses","description":"\u003cp\u003eEcotherm Eco-Cavity Full Fill is a \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity wall\u003c\/a\u003e insulation board with a thermal conductivity of 0.022 W\/mK. Ideal for use with masonry walls, Eco-Cavity Full Fill is suitable where the requirement is for insulation to completely fill.\u003c\/p\u003e","brand":"Ecotherm","offers":[{"title":"90mm (4 boards = 2.16m²) - Per pack","offer_id":48236718915931,"sku":"48236718915931","price":72.5,"currency_code":"GBP","in_stock":true},{"title":"115mm (4 boards = 2.16m²) - Per pack","offer_id":48236718948699,"sku":"48236718948699","price":86.0,"currency_code":"GBP","in_stock":true},{"title":"140mm (3 boards = 1.62m²) - Per pack","offer_id":48236718981467,"sku":"48236718981467","price":77.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Eco-CavityFullFill.jpg?v=1715698400"},{"product_id":"celotex-thermaclass-cavity-wall-21-1190mm-x-450mm-all-thicknesses","title":"Celotex Thermaclass Cavity Wall 21 - 1190mm x 450mm - All Thicknesses","description":"\u003cp\u003eCelotex Thermaclass Cavity Wall 21 is a user-friendly polyisocyanurate (PIR) insulation board designed for full fill and partial fill \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity wall \u003c\/a\u003eapplications, boasting outstanding thermal performance with a thermal conductivity of 0.021 W\/m.K. Enhanced with a low emissivity foil facing, it offers flexibility in installation, allowing for up to a 10mm residual cavity to accommodate mortar squeeze or for a full fill solution with no residual cavity. Its ease of installation and high thermal efficiency make it an excellent choice for cavity wall insulation projects.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Celotex","offers":[{"title":"90mm (6 boards = 3.21m²) - Per pack","offer_id":48379768570203,"sku":"48379768570203","price":122.9,"currency_code":"GBP","in_stock":true},{"title":"115mm (5 boards = 2.76m²) - Per pack","offer_id":48379768602971,"sku":"48379768602971","price":124.8,"currency_code":"GBP","in_stock":true},{"title":"140mm (4 boards = 2.14m²) - Per pack","offer_id":48379768635739,"sku":"48379768635739","price":123.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Celotex_Thermaclass_21_Image.jpg?v=1717156756"},{"product_id":"knauf-dritherm®-cavity-slab-32-1200mm-x-455mm-all-thicknesses","title":"Knauf Dritherm® Cavity Slab 32 - 1200mm x 455mm - All Thicknesses","description":"\u003cp\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/knauf\" title=\"Knauf Brand Page\"\u003eKnauf\u003c\/a\u003e \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/knauf-dritherm-cavity-slab\" title=\"Dritherm Cavity Slab Collection Page\"\u003eDriTherm® Cavity Slab\u003c\/a\u003e 32 is a water-repellent glass mineral wool slab designed for use in external full-fill masonry \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity walls\u003c\/a\u003e. With a thermal conductivity (lambda) of 0.032 W\/mK, it offers the best thermal performance in our range. This product is non-combustible, achieving the best possible Euroclass A1 reaction to fire classification. It is also manufactured using our unique bio-based binder, ECOSE® Technology.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Knauf","offers":[{"title":"75mm (6 slabs = 3.28m²) - per pack","offer_id":48422679740763,"sku":"48422679740763","price":32.4,"currency_code":"GBP","in_stock":true},{"title":"85mm (5 slabs = 2.73m²) - per pack","offer_id":48422679773531,"sku":"48422679773531","price":31.2,"currency_code":"GBP","in_stock":true},{"title":"100mm (6 slabs = 3.28m²) - per pack","offer_id":48422679806299,"sku":"48422679806299","price":38.2,"currency_code":"GBP","in_stock":true},{"title":"125mm (4 slabs = 2.18m²) - per pack","offer_id":48422679839067,"sku":"48422679839067","price":32.0,"currency_code":"GBP","in_stock":true},{"title":"150mm (4 slabs = 2.18m²) - per pack","offer_id":48422679871835,"sku":"48422679871835","price":36.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/KnaufInsulationFrameTherm32-Image-UK-nowatermark.jpg?v=1717598499"},{"product_id":"knauf-dritherm-cavity-slab-34","title":"Knauf Dritherm Cavity Slab 34 - 1200mm x 455mm - All Thicknesses","description":"\u003cp\u003e\u003ca title=\"Knauf Brand Page\" href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/knauf\"\u003eKnauf\u003c\/a\u003e \u003ca title=\"Dritherm Cavity Slab Collection Page\" href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/knauf-dritherm-cavity-slab\"\u003eDriTherm® Cavity Slab\u003c\/a\u003e 34 is a water-repellent glass mineral wool slab designed for use in external full-fill masonry \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity walls\u003c\/a\u003e. It offers a thermal conductivity of 0.034 W\/mK. DriTherm® Cavity Slab 34 is non-combustible, achieving the best possible Euroclass A1 reaction to fire classification. It is also manufactured using our unique bio-based binder, ECOSE® Technology. \u003c\/p\u003e\n\u003c!----\u003e","brand":"Knauf","offers":[{"title":"75mm (10 slabs = 5.46m²) - per pack","offer_id":48429909442907,"sku":"48429909442907","price":49.6,"currency_code":"GBP","in_stock":true},{"title":"100mm (8 slabs = 4.32m²) - per pack","offer_id":48429909475675,"sku":"48429909475675","price":51.9,"currency_code":"GBP","in_stock":true},{"title":"125mm (6 slabs = 3.24m²) - per pack","offer_id":48429909508443,"sku":"48429909508443","price":48.9,"currency_code":"GBP","in_stock":true},{"title":"150mm (5 slabs = 2.73m²) - per pack","offer_id":48429909541211,"sku":"48429909541211","price":49.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/KnaufInsulationFrameTherm32-Image-UK-nowatermark_1bff8337-b7dd-49a6-89a3-556dd6d7d755.jpg?v=1717672434"},{"product_id":"knauf-dritherm-cavity-slab-37-1200mm-x-455mm-all-thicknesses","title":"Knauf Dritherm Cavity Slab 37 - 1200mm x 455mm - All Thicknesses","description":"\u003cp\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/knauf\" title=\"Knauf Brand Page\"\u003eKnauf\u003c\/a\u003e \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/knauf-dritherm-cavity-slab\" title=\"Dritherm Cavity Slab Collection Page\"\u003eDriTherm® Cavity Slab\u003c\/a\u003e 37 is a water-repellent glass mineral wool slab designed for use in external full-fill masonry \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity walls\u003c\/a\u003e. It offers a thermal conductivity of 0.037 W\/mK. DriTherm® Cavity Slab 37 is non-combustible, achieving the best possible Euroclass A1 reaction to fire classification. It is also manufactured using our unique bio-based binder, ECOSE® Technology.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Knauf","offers":[{"title":"50mm (12 slabs = 6.55m²) per pack","offer_id":48436622885211,"sku":"48436622885211","price":24.4,"currency_code":"GBP","in_stock":true},{"title":"65mm (10 slabs = 5.4m²) per pack","offer_id":48436622917979,"sku":"48436622917979","price":28.8,"currency_code":"GBP","in_stock":true},{"title":"75mm (8 slabs = 4.37m²) per pack","offer_id":48436622950747,"sku":"48436622950747","price":19.8,"currency_code":"GBP","in_stock":true},{"title":"85mm (8 slabs = 4.32m²) per pack","offer_id":48436622983515,"sku":"48436622983515","price":28.1,"currency_code":"GBP","in_stock":true},{"title":"100mm (12 slabs = 6.55m²) per pack","offer_id":48436623016283,"sku":"48436623016283","price":38.6,"currency_code":"GBP","in_stock":true},{"title":"125mm (6 slabs = 3.28m²) per pack","offer_id":48436623049051,"sku":"48436623049051","price":24.5,"currency_code":"GBP","in_stock":true},{"title":"150mm (8 slabs = 4.37m²) per pack","offer_id":48436623081819,"sku":"48436623081819","price":39.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/KnaufInsulationGenericGreenRollHorizontal-Image-UK-nowatermark.jpg?v=1717748559"},{"product_id":"rockwool-full-fill-cavity-batt-all-thicknesses","title":"Rockwool Full Fill Cavity Batt - All Thicknesses","description":"\u003cp\u003eROCKWOOL® Full Fill Cavity Batt has been a trusted cavity wall insulation choice for more than three decades, ideal for new residential and commercial builds as well as extensions. Made from stone wool insulation, Full Fill Cavity Batt effectively prevents moisture ingress and maintains its insulation properties over time.\u003c\/p\u003e\n\u003cp\u003eIts lightweight nature ensures easy handling during installation, allowing for a precise fit against brick and blockwork while accommodating irregularities in the cavity wall.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Rockwool","offers":[{"title":"50mm (6.55m²) per pack | 1200mm  x 455mm","offer_id":48557119406427,"sku":"48557119406427","price":58.5,"currency_code":"GBP","in_stock":true},{"title":"75mm (4.91m²) per pack | 1200mm  x 455mm","offer_id":48557119439195,"sku":"48557119439195","price":57.1,"currency_code":"GBP","in_stock":true},{"title":"80mm (4.37m²) per pack | 1200mm  x 455mm","offer_id":48557119471963,"sku":"48557119471963","price":53.3,"currency_code":"GBP","in_stock":true},{"title":"100mm (3.28m²) per pack | 1200mm  x 455mm","offer_id":48557119504731,"sku":"48557119504731","price":52.7,"currency_code":"GBP","in_stock":true},{"title":"150mm (2.18m²) per pack | 1200mm  x 455mm","offer_id":48557119537499,"sku":"48557119537499","price":53.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Rockwool-full-fill-cavity-batt.png?v=1760958547"},{"product_id":"rockwool-nyrock-cavity-slab-32-1200mm-x-455mm-all-thicknesses","title":"Rockwool Nyrock Cavity Slab 32 - 1200mm x 455mm - All Thicknesses","description":"\u003cp\u003eNyRock Cavity Slab 032 is a stone wool insulation product designed for both full and partial fill applications in masonry \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity walls\u003c\/a\u003e. With a thermal conductivity of 0.032 W\/mK, it provides excellent thermal insulation, helping to enhance the energy efficiency of buildings. The slab is non-combustible, offering additional fire protection, and its inherent water-repellent properties prevent moisture ingress, reducing the risk of dampness and mould. NyRock Cavity Slab 032 is easy to install and remains durable over time, making it a reliable choice for improving the thermal performance of cavity walls in both new builds and retrofits.\u003c\/p\u003e","brand":"Rockwool","offers":[{"title":"50mm (15 packs = 65.52m²) | per pallet","offer_id":48960365822299,"sku":"48960365822299","price":835.1,"currency_code":"GBP","in_stock":true},{"title":"75mm (20 packs = 43.68m²) | per pallet","offer_id":48960365855067,"sku":"48960365855067","price":835.5,"currency_code":"GBP","in_stock":true},{"title":"85mm (15 packs = 32.76m²) | per pallet","offer_id":48960409534811,"sku":"48960409534811","price":710.0,"currency_code":"GBP","in_stock":true},{"title":"100mm (15 packs = 32.76m²) | per pallet","offer_id":48960409600347,"sku":"48960409600347","price":691.7,"currency_code":"GBP","in_stock":true},{"title":"125mm (15 packs = 24.57m²) | per pallet","offer_id":48960409633115,"sku":"48960409633115","price":648.0,"currency_code":"GBP","in_stock":true},{"title":"150mm (20 packs = 21.84m²) | per pallet","offer_id":48960409665883,"sku":"48960409665883","price":680.7,"currency_code":"GBP","in_stock":true},{"title":"160mm (20 packs = 21.84m²) | per pallet","offer_id":48960409698651,"sku":"48960409698651","price":1119.0,"currency_code":"GBP","in_stock":true},{"title":"200mm (15 packs = 16.38m²) | per pallet","offer_id":48960409731419,"sku":"48960409731419","price":691.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/rockwool-nyrock-frame-slab-32.png?v=1760961514"},{"product_id":"ursa-cavity-batt","title":"URSA CAVITY BATT 32 - 1350mm x 455mm - All Thicknesses","description":"\u003cp\u003eURSA 32 Cavity Insulation Batt is designed for use in both fully and partially filled masonry \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity walls\u003c\/a\u003e, with a low thermal conductivity of 0.032 W\/mK, it provides exceptional thermal efficiency, helping reduce heat loss and improve energy ratings in buildings. It is also effective in preventing thermal bypass when installed in masonry cavity party walls, further enhancing its insulating capabilities. Certified by BBA Certificate 09\/4624, URSA 32 offers dependable quality and performance, making it ideal for both new builds and retrofit projects.\u003c\/p\u003e","brand":"URSA","offers":[{"title":"75mm (4.3m²) | 7 per pack","offer_id":49046504866139,"sku":"49046504866139","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"85mm (3.69m²) | 6 per pack","offer_id":49046504898907,"sku":"49046504898907","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"100mm (3.07m²) | 5 per pack","offer_id":49046504931675,"sku":"49046504931675","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"125mm (2.46m²) | 4 per pack","offer_id":49046504964443,"sku":"49046504964443","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"150mm (2.46m²) | 4 per pack","offer_id":49046504997211,"sku":"49046504997211","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"175mm (1.84m²) | 3 per pack","offer_id":49046505029979,"sku":"49046505029979","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"200mm (1.84m²) 3 per pack","offer_id":49046505062747,"sku":"49046505062747","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Cavitybatt_c6a2a8fd-4ced-455c-a092-b52dbc01c555.webp?v=1726739310"},{"product_id":"ursa-cavity-batt-35-1350mm-x-455mm-all-thicknesses","title":"URSA CAVITY BATT 35 - 1350mm x 455mm - All Thicknesses","description":"\u003cp\u003eURSA 35 Cavity Insulation Batt is designed for use in both fully and partially filled masonry \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity walls\u003c\/a\u003e, with a thermal conductivity of 0.035 W\/mK. Suitable for both fully and partially filled masonry cavities, it also offers enhanced thermal efficiency when used in party walls, helping to mitigate thermal bypass. Its mineral wool construction provides reliable and durable insulation, contributing to a more energy-efficient and comfortable indoor environment. With BBA certification (09\/4624), the URSA 35 Cavity Batt is a trusted choice for building professionals focused on performance, quality, and ease of installation.\u003c\/p\u003e","brand":"URSA","offers":[{"title":"75mm (4.3m²) | 7 per pack","offer_id":49047035707739,"sku":"49047035707739","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"100mm (3.07m²) | 5 per pack","offer_id":49047035773275,"sku":"49047035773275","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"125mm (2.46m²) | 4 per pack","offer_id":49047035806043,"sku":"49047035806043","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"150mm (2.46m²) | 4 per pack","offer_id":49047035838811,"sku":"49047035838811","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Cavitybatt_c6a2a8fd-4ced-455c-a092-b52dbc01c555.webp?v=1726739310"},{"product_id":"soprema-thermaclass-cavity-wall-21-1190mm-x-450mm","title":"Soprema Thermaclass Cavity Wall 21 - 1190mm x 450mm","description":"\u003cp\u003eThermaclass Cavity Wall 21 is a rigid polyisocyanurate (PIR) thermal insulation board designed for full fill cavity wall applications, delivering a low thermal conductivity of 0.021 W\/m·K. The board features a low emissivity foil facing to support high levels of thermal performance.\u003c\/p\u003e\n\u003cp\u003eIt can be installed with up to a 10mm residual cavity to allow for ease of installation and accommodate mortar squeeze, or used as a true full fill solution with no residual cavity, providing flexibility across a range of cavity wall constructions.\u003c\/p\u003e","brand":"Soprema","offers":[{"title":"90mm (6 boards = 3.21m²) - Per pack","offer_id":52116653932891,"sku":"52116653932891","price":122.9,"currency_code":"GBP","in_stock":true},{"title":"115mm (5 boards = 2.76m²) - Per pack","offer_id":52116653965659,"sku":"52116653965659","price":124.8,"currency_code":"GBP","in_stock":true},{"title":"140mm (4 boards = 2.14m²) - Per pack","offer_id":52116653998427,"sku":"52116653998427","price":123.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/webimage-TC140-Close-up-3-SOPREMA.webp?v=1769508250"},{"product_id":"celotex-cw4000-ff-full-fill-cavity-wall-insulation-board-1190mm-x-450mm","title":"Celotex CW4000 FF (Full Fill Cavity Wall Insulation Board) 1190mm x 450mm","description":"\u003cp\u003eCelotex CW4000 FF is a Full Fill rigid thermal insulation board manufactured from polyisocyanurate (PIR) foam. The board is faced on both sides with a low emissivity aluminium composite foil.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e\u003cspan\u003e Following SOPREMA’s acquisition of Celotex, the Celotex range has been rebranded as SOPRATHERM. Your order will therefore arrive with SOPRATHERM branding. This is the same product with the same specifications and performance, supplied under new branding—\u003c\/span\u003e\u003cstrong\u003enot\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003ea cheaper substitute or alternative.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt is designed for use as thermal insulation in full fill cavity wall applications. The low emissivity foil facing allows the board to be installed either as a full fill solution or with up to a 10mm residual cavity. The residual cavity can assist with ease of installation and help accommodate mortar squeeze during construction.\u003c\/p\u003e\n\u003cp\u003eCelotex CW4000 FF is used within cavity wall constructions where rigid PIR insulation is required to provide thermal performance within the wall build-up.\u003c\/p\u003e","brand":"Celotex","offers":[{"title":"90mm","offer_id":52468649525595,"sku":"52468649525595","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"115mm","offer_id":52468649558363,"sku":"52468649558363","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"140mm","offer_id":52468649591131,"sku":"52468649591131","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Celotex_CW4000_FF_Full_Fill_Cavity_Wall_Insulation_Board_1190mm_x_450mm.jpg?v=1772124532"},{"product_id":"soprema-cw4000-ff-full-fill-cavity-wall-insulation-board-1190mm-x-450mm","title":"Soprema CW4000 FF (Full Fill Cavity Wall Insulation Board) 1190mm x 450mm","description":"\u003cp\u003eSoprema Sopratherm CW4000 FF (formally knowns as Celotex) is a Full Fill rigid thermal insulation board manufactured from polyisocyanurate (PIR) foam. The board is faced on both sides with a low emissivity aluminium composite foil.\u003c\/p\u003e\n\u003cp\u003eIt is designed for use as thermal insulation in full fill cavity wall applications. The low emissivity foil facing allows the board to be installed either as a full fill solution or with up to a 10mm residual cavity. The residual cavity can assist with ease of installation and help accommodate mortar squeeze during construction.\u003c\/p\u003e\n\u003cp\u003eSoprema CW4000 FF is used within cavity wall constructions where rigid PIR insulation is required to provide thermal performance within the wall build-up.\u003c\/p\u003e","brand":"Soprema","offers":[{"title":"90mm","offer_id":52470073885019,"sku":"52470073885019","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"115mm","offer_id":52470073917787,"sku":"52470073917787","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"140mm","offer_id":52470073950555,"sku":"52470073950555","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Soprema_CW4000_FF_Full_Fill_Cavity_Wall_Insulation_Board_1190mm_x_450mm.webp?v=1772124962"}],"url":"https:\/\/www.nationalinsulationsupplies.com\/collections\/full-fill-cavity-wall-insulation.oembed","provider":"National Insulation Supplies","version":"1.0","type":"link"}