{"title":"Partial Fill Cavity Wall Insulation","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eImprove the thermal performance of masonry cavity walls with our range of partial fill cavity wall insulation. Designed to insulate part of the cavity while maintaining a clear residual gap, these products help reduce heat loss and support energy-efficient wall construction.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eOur collection includes partial fill insulation products suitable for residential, commercial and new-build projects. Available in a range of thicknesses and thermal performances, they allow installers to choose an appropriate solution for the required cavity width and project specification.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWhat Is Partial Fill Cavity Wall Insulation?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePartial fill cavity wall insulation is installed against the inner leaf of a masonry cavity wall, leaving a clear gap between the insulation and the outer brickwork.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis residual cavity helps manage moisture and provides a clear space between the insulation layer and the external leaf. Partial fill systems are commonly used where the building design, exposure conditions or project specification requires a maintained cavity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePartial fill cavity insulation is often supplied as rigid insulation boards, including foil-faced PIR boards, although the correct product will depend on the wall construction and project requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eBenefits of Partial Fill Cavity Insulation\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUsing a suitable partial fill cavity wall insulation product can provide several benefits:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eHelps reduce heat loss through external masonry walls\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSupports improved thermal and energy performance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaintains a clear residual cavity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAvailable in a range of thicknesses and thermal conductivities\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for many new-build residential and commercial projects\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCan provide strong thermal performance with a relatively slim insulation layer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAllows insulation thickness to be selected around the required cavity width\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eShop Partial Fill Insulation Products\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eExplore our selection of partial fill cavity insulation from trusted manufacturers. Our collection includes insulation boards designed to provide reliable thermal performance and straightforward installation within masonry cavity walls.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePopular options within this collection include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/celotex-cw4000-1200mm-x-450mm-all-thicknesses\" title=\"Celotex CW4000 Partial Fill Cavity Wall Insulation\"\u003eCelotex CW4000 Partial Fill Cavity Wall Insulation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/soprema-partial-fill-cw4000-cavity-wall-insulation-1200mm-x-450mm\" title=\"Soprema CW4000 (Partial Fill Cavity Wall Insulation)\"\u003eSoprema CW4000 (Partial Fill Cavity Wall Insulation)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/kingspan-kooltherm-k108-cavity-board-1200mm-x-450mm-all-thicknesses\" title=\"Kingspan Kooltherm K108 Cavity Board\"\u003eKingspan Kooltherm K108 Cavity Board\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/products\/rockwool-high-performance-partial-fill-cavity-slab-1200mm-x-455mm-all-thicknesses\" title=\"Rockwool High Performance Partial Fill Cavity Slab\"\u003eRockwool High Performance Partial Fill Cavity Slab\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eEach product page includes further information about available thicknesses, board dimensions, thermal conductivity and recommended applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eChoosing the Right Partial Fill Cavity Wall Insulation\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWhen choosing partial fill cavity wall insulation, consider the total cavity width, required residual gap, insulation thickness, target U-value and the thermal conductivity of the product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eYou should also consider the building’s location, exposure conditions, wall-tie system and the requirements of the architectural or building specification.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe insulation boards should be installed tightly together with correctly staggered joints to help minimise gaps in the insulation layer. Always follow the manufacturer’s installation guidance and confirm that the selected product is suitable for the intended wall construction.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003ePartial Fill or Full Fill Cavity Insulation?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePartial fill insulation leaves a clear cavity between the insulation and the outer leaf of the wall. Full fill cavity wall insulation is designed to occupy the full available cavity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe most appropriate option will depend on the wall design, required thermal performance, cavity width, exposure conditions and project specification.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor alternative products, browse our \u003cspan data-placeholder-token=\"true\" class=\"text-token-text-primary cursor-text rounded-sm\"\u003e[\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/full-fill-cavity-wall-insulation\" title=\"Full Fill Cavity Wall Insulation\"\u003efull fill cavity wall insulation\u003c\/a\u003e]\u003c\/span\u003e, \u003cspan data-placeholder-token=\"true\" class=\"text-token-text-primary cursor-text rounded-sm\"\u003e[\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"Cavity Wall Insulation\"\u003ecavity wall insulation\u003c\/a\u003e]\u003c\/span\u003e, \u003cspan data-placeholder-token=\"true\" class=\"text-token-text-primary cursor-text rounded-sm\"\u003e[\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/pir-insulation\" title=\"PIR Insulation\"\u003ePIR insulation boards\u003c\/a\u003e]\u003c\/span\u003e and \u003cspan data-placeholder-token=\"true\" class=\"text-token-text-primary cursor-text rounded-sm\"\u003e[\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/wall-insulation\" title=\"Wall Insulation\"\u003ewall insulation\u003c\/a\u003e]\u003c\/span\u003e collections.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOrder partial 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 insulation project.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"kingspan-kooltherm-k108-cavity-board-1200mm-x-450mm-all-thicknesses","title":"Kingspan Kooltherm K108 Cavity Board - 1200mm x 450mm - All Thicknesses","description":"\u003cp\u003eKingspan Kooltherm K108 offers premium performance as a partial fill \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-ins\" title=\"cavity wall insulation\"\u003ecavity wall insulation\u003c\/a\u003e solution. With a thermal conductivity of 0.019 W\/mK, it achieves the same wall U-value as alternative products with a thinner profile. Its low thermal conductivity helps maximise usable internal floor space.\u003c\/p\u003e","brand":"Kingspan","offers":[{"title":"40mm (12 Sheets = 6.48m²) - Per pack","offer_id":48126095851867,"sku":"48126095851867","price":142.5,"currency_code":"GBP","in_stock":true},{"title":"50mm (10 Sheets = 5.4m²) - Per pack","offer_id":48126095884635,"sku":"48126095884635","price":123.6,"currency_code":"GBP","in_stock":true},{"title":"60mm (8 Sheets = 4.32m²) - Per pack","offer_id":48126095917403,"sku":"48126095917403","price":115.2,"currency_code":"GBP","in_stock":true},{"title":"70mm (6 Sheets = 3.24m²) - Per pack","offer_id":48126095950171,"sku":"48126095950171","price":119.0,"currency_code":"GBP","in_stock":true},{"title":"75mm (6 Sheets = 3.24m²) - Per pack","offer_id":48126095982939,"sku":"48126095982939","price":107.8,"currency_code":"GBP","in_stock":true},{"title":"80mm (6 Sheets = 3.24m²) - Per pack","offer_id":48126096015707,"sku":"48126096015707","price":135.6,"currency_code":"GBP","in_stock":true},{"title":"90mm (4 Sheets = 2.16m²) - Per pack","offer_id":48126096048475,"sku":"48126096048475","price":101.6,"currency_code":"GBP","in_stock":true},{"title":"100mm (5 Sheets = 2.70m²) - Per pack","offer_id":48126096081243,"sku":"48126096081243","price":119.0,"currency_code":"GBP","in_stock":true},{"title":"110mm (4 Sheets = 2.16m²) - Per pack","offer_id":48126096114011,"sku":"48126096114011","price":123.7,"currency_code":"GBP","in_stock":true},{"title":"120mm (4 Sheets = 2.16m²) - Per pack","offer_id":48126096146779,"sku":"48126096146779","price":134.8,"currency_code":"GBP","in_stock":true},{"title":"150mm (3 Sheets = 1.62m²) - Per pack","offer_id":48126096179547,"sku":"48126096179547","price":126.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/K107-square_e807f80e-93bf-4363-bc74-fd3b61103246.jpg?v=1713967797"},{"product_id":"recticel-eurowall®-cavity-1200mm-x-450mm-all-thicknesses","title":"Recticel Eurowall® (Partial Fill Cavity) - 1200mm x 450mm - All Thicknesses","description":"\u003cp\u003eRecticel Eurowall® Cavity is a specialist high-performance solution for \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity walls\u003c\/a\u003e, featuring precision-cut straight edges to minimise gaps between boards. It includes a low emissivity facing that improves thermal resistance within the clear cavity.\u003c\/p\u003e","brand":"Recticel","offers":[{"title":"30mm (32 Sheets = 17.28m²) - Per pack","offer_id":48204338692443,"sku":"48204338692443","price":228.3,"currency_code":"GBP","in_stock":true},{"title":"40mm (24 Sheets = 12.96m²) - Per pack","offer_id":48204338725211,"sku":"48204338725211","price":213.3,"currency_code":"GBP","in_stock":true},{"title":"50mm (20 Sheets = 10.8m²) - Per pack","offer_id":48204338757979,"sku":"48204338757979","price":212.5,"currency_code":"GBP","in_stock":true},{"title":"60mm (16 Sheets = 8.64m²) - Per pack","offer_id":48204338790747,"sku":"48204338790747","price":174.7,"currency_code":"GBP","in_stock":true},{"title":"70mm (14 Sheets = 7.56m²) - Per pack","offer_id":48204338823515,"sku":"48204338823515","price":172.5,"currency_code":"GBP","in_stock":true},{"title":"75mm (12 Sheets = 6.48m²) - Per pack","offer_id":49025355088219,"sku":"49025355088219","price":181.0,"currency_code":"GBP","in_stock":true},{"title":"80mm (12 Sheets = 6.48m²) - Per pack","offer_id":49025355120987,"sku":"49025355120987","price":212.7,"currency_code":"GBP","in_stock":true},{"title":"90mm (10 Sheets = 5.4m²) - Per pack","offer_id":49025355153755,"sku":"49025355153755","price":154.2,"currency_code":"GBP","in_stock":true},{"title":"100mm (10 Sheets = 5.40m²) - Per pack","offer_id":49025355186523,"sku":"49025355186523","price":231.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Eurowall_Cavity_3.png?v=1721121901"},{"product_id":"ecotherm-eco-cavity-1200mm-x-450mm-all-thicknesses","title":"Ecotherm Eco-Cavity - 1200mm x 450mm - All Thicknesses","description":"\u003cp\u003eEcotherm Eco-Cavity is a partial fill \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 can achieve good levels of thermal performance in thinner constructions while maintaining a clear residual air gap.\u003c\/p\u003e","brand":"Ecotherm","offers":[{"title":"50mm (10 boards = 5.4m²) - Per pack","offer_id":48235610833243,"sku":"48235610833243","price":70.9,"currency_code":"GBP","in_stock":true},{"title":"60mm (8 boards = 4.32m²) - Per pack","offer_id":48235610866011,"sku":"48235610866011","price":74.3,"currency_code":"GBP","in_stock":true},{"title":"75mm (6 boards = 3.24m²) - Per pack","offer_id":48235610931547,"sku":"48235610931547","price":67.3,"currency_code":"GBP","in_stock":true},{"title":"100mm (5 boards = 2.7m²) - Per pack","offer_id":48235610997083,"sku":"48235610997083","price":72.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Eco-Cavity.jpg?v=1715685596"},{"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":"celotex-cw4000-1200mm-x-450mm-all-thicknesses","title":"Celotex CW4000 Partial Fill Cavity Wall Insulation - 1200mm x 450mm - All Thicknesses","description":"\u003cp\u003eCW4000 Partial Fill \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"Cavity wall insulation\"\u003ecavity wall\u003c\/a\u003e insulation by \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/celotex\"\u003eCelotex\u003c\/a\u003e is a straightforward-to-install polyisocyanurate (PIR) insulation board renowned for its exceptional thermal performance, equipped with a low emissivity foil facing. Available in thicknesses ranging from 40mm to 100mm, it is specifically designed for use in \u003cstrong\u003epartial fill\u003c\/strong\u003e cavity wall applications. Its high-quality insulation properties combined with its ease of installation make it an ideal choice for enhancing the thermal efficiency of buildings.\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\u003c!----\u003e","brand":"Celotex","offers":[{"title":"40mm – 1 Pallet Only (16 Packs \/ 120.96m²)","offer_id":48379929461083,"sku":"48379929461083","price":1234.0,"currency_code":"GBP","in_stock":true},{"title":"50mm (11 boards = 5.94m²) - Per pack","offer_id":48379929493851,"sku":"48379929493851","price":72.2,"currency_code":"GBP","in_stock":true},{"title":"60mm (10 boards = 5.40m²) - Per pack","offer_id":48379929526619,"sku":"48379929526619","price":90.1,"currency_code":"GBP","in_stock":true},{"title":"75mm (8 boards = 4.32m²) - Per pack","offer_id":48379929559387,"sku":"48379929559387","price":70.2,"currency_code":"GBP","in_stock":true},{"title":"85mm – 1 Pallet Only (16 Packs \/ 60.48m²)","offer_id":48379929592155,"sku":"48379929592155","price":1345.0,"currency_code":"GBP","in_stock":true},{"title":"100mm (6 boards = 3.24m²) - Per pack","offer_id":48379929624923,"sku":"48379929624923","price":68.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/celotex-cw4000-insulation-board-upscaled.jpg?v=1717157587"},{"product_id":"rockwool-high-performance-partial-fill-cavity-slab-1200mm-x-455mm-all-thicknesses","title":"Rockwool High Performance Partial Fill Cavity Slab - 1200mm x 455mm - All Thicknesses","description":"\u003cp\u003eThe ROCKWOOL High Performance Partial Fill Cavity Slab is a semi-rigid insulation solution designed for masonry\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003e cavity wall\u003c\/a\u003e construction. It is Euroclass A1 rated and provides excellent thermal performance and ease of installation. The dual density design absorbs irregularities on the inner leaf and provides a robust outer surface for fixing retaining clips. These features enhance the longevity of the external wall construction by delivering long-term energy efficiency and minimising heat loss through gaps in the insulation layer.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Rockwool","offers":[{"title":"50mm (8 pieces = 4.37m²) - per pack","offer_id":48561230053723,"sku":"48561230053723","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"80mm (8 pieces = 4.37m²) - per pack","offer_id":48561645093211,"sku":"48561645093211","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"100mm (6 pieces = 3.28m²) - per pack","offer_id":48561645125979,"sku":"48561645125979","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"120mm (5 pieces = 2.73m²) - per pack","offer_id":48561645158747,"sku":"48561645158747","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"150mm (4 pieces = 2.18m²) - per pack","offer_id":48561645191515,"sku":"48561645191515","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"170mm (4 pieces = 2.18m²) - per pack","offer_id":48561645224283,"sku":"48561645224283","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/rockwool-high-performance-partial-fill-cavity-slab.jpg?v=1719310802"},{"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":"knauf-rocksilk-rainscreen-slab-1200mm-x-600mm","title":"Knauf Rocksilk Rainscreen Slab - 1200mm x 600mm","description":"\u003cp\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/knauf-rocksilk\"\u003eRocksilk\u003c\/a\u003e® RainScreen Slab 1200mm x 600mm\u003c\/strong\u003e is a rock mineral wool slab, certified by the BBA Agrément, designed for use in partially-filled masonry or reinforced concrete \u003ca href=\"https:\/\/www.nationalinsulationsupplies.com\/collections\/cavity-wall-insulation\" title=\"cavity wall insulation\"\u003ecavity walls\u003c\/a\u003e in both residential and non-residential buildings of any height.\u003c\/p\u003e\n\u003cp\u003eRocksilk Rainscreen Slab is also suitable for cavities in areas of 'very severe' exposure without requiring rendering on the outer leaf. Additionally Rocksilk Rainscreen Slab is non-combustible, achieving the highest Euroclass A1 fire reaction classification.\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"50mm (12 packs = 69.12m²) - per pallet","offer_id":50782787731803,"sku":"50782787731803","price":778.9,"currency_code":"GBP","in_stock":true},{"title":"60mm (180 packs = 907.20m²) - per 15 pallet MOQ","offer_id":50782787764571,"sku":"50782787764571","price":11835.0,"currency_code":"GBP","in_stock":true},{"title":"70mm (180 packs = 777.6m²) - per 15 pallet MOQ","offer_id":50805541470555,"sku":"50805541470555","price":11795.0,"currency_code":"GBP","in_stock":true},{"title":"75mm (12 packs = 51.84m²) - per pallet","offer_id":50782787797339,"sku":"50782787797339","price":753.3,"currency_code":"GBP","in_stock":true},{"title":"80mm (192 packs = 691.20m²) - per 16 pallet MOQ","offer_id":50782787830107,"sku":"50782787830107","price":11754.0,"currency_code":"GBP","in_stock":true},{"title":"90mm (192 packs = 691.20m²) - per 16 pallet MOQ","offer_id":50782787862875,"sku":"50782787862875","price":13126.0,"currency_code":"GBP","in_stock":true},{"title":"100mm (12 packs = 34.56m²) - per pallet","offer_id":50782787895643,"sku":"50782787895643","price":669.5,"currency_code":"GBP","in_stock":true},{"title":"110mm (180 packs = 518.40m²) - per 15 pallet MOQ","offer_id":50782787928411,"sku":"50782787928411","price":12847.0,"currency_code":"GBP","in_stock":true},{"title":"120mm (10 packs = 28.80m²) - per pallet","offer_id":50805541503323,"sku":"50805541503323","price":730.3,"currency_code":"GBP","in_stock":true},{"title":"125mm (10 packs = 57.60m²) - per 2 pallet MOQ","offer_id":50805541536091,"sku":"50805541536091","price":1449.0,"currency_code":"GBP","in_stock":true},{"title":"130mm (12 packs = 440.64m²) - per 17 pallet MOQ","offer_id":50805541568859,"sku":"50805541568859","price":11998.0,"currency_code":"GBP","in_stock":true},{"title":"140mm (180 packs = 388.80m²) - per 15 pallet MOQ","offer_id":50782787961179,"sku":"50782787961179","price":10550.0,"currency_code":"GBP","in_stock":true},{"title":"150mm (12 packs = 25.92m²) - per pallet","offer_id":50782787993947,"sku":"50782787993947","price":811.6,"currency_code":"GBP","in_stock":true},{"title":"155mm (12 packs = 362.88m²) - per 14 pallet MOQ","offer_id":50805541601627,"sku":"50805541601627","price":12309.0,"currency_code":"GBP","in_stock":true},{"title":"160mm (10 packs = 345.60m²) - per 16 pallet MOQ","offer_id":50805541634395,"sku":"50805541634395","price":10612.0,"currency_code":"GBP","in_stock":true},{"title":"165mm (10 packs = 345.60m²) - per 16 pallet MOQ","offer_id":50805541667163,"sku":"50805541667163","price":10662.0,"currency_code":"GBP","in_stock":true},{"title":"170mm (10 packs = 324m²) - per 15 pallet MOQ","offer_id":50805541699931,"sku":"50805541699931","price":10711.0,"currency_code":"GBP","in_stock":true},{"title":"180mm (10 packs = 21.60m²) - per pallet","offer_id":50805541732699,"sku":"50805541732699","price":952.3,"currency_code":"GBP","in_stock":true},{"title":"190mm (12 packs = 293.76m²) - per 17 pallet MOQ","offer_id":50805541765467,"sku":"50805541765467","price":13982.0,"currency_code":"GBP","in_stock":true},{"title":"200mm (12 packs = 17.28m²) - per pallet","offer_id":50782788026715,"sku":"50782788026715","price":801.1,"currency_code":"GBP","in_stock":true},{"title":"210mm (12 packs = 17.28m²) - per pallet","offer_id":50782788059483,"sku":"50782788059483","price":1041.0,"currency_code":"GBP","in_stock":true},{"title":"220mm (180 packs = 259.20m²) - per 15 pallet MOQ","offer_id":50782788092251,"sku":"50782788092251","price":11961.0,"currency_code":"GBP","in_stock":true},{"title":"230mm (12 packs = 241.92m²) - per 14 pallet MOQ","offer_id":50805541798235,"sku":"50805541798235","price":9508.0,"currency_code":"GBP","in_stock":true},{"title":"240mm (10 packs = 230.40m²) - per 16 pallet MOQ","offer_id":50805541831003,"sku":"50805541831003","price":10511.0,"currency_code":"GBP","in_stock":true},{"title":"250mm (10 packs = 230.40m²) - per 16 pallet MOQ","offer_id":50805541863771,"sku":"50805541863771","price":10906.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Knauf_Insulation_Rocksilk_Rainscreen_Slab-Image-UK_-_no_watermark.jpg?v=1749718995"},{"product_id":"soprema-partial-fill-cw4000-cavity-wall-insulation-1200mm-x-450mm","title":"Soprema CW4000 (Partial Fill Cavity Wall Insulation) 1200mm x 450mm","description":"\u003cp data-end=\"339\" data-start=\"73\"\u003eSoprema Sopratherm partial fill CW4000 (formerly Celotex CW4000) is a rigid polyisocyanurate (PIR) thermal insulation board with a low-emissivity foil facing, designed for ease of handling and installation. It is suitable for use in \u003cstrong\u003epartial fill\u003c\/strong\u003e masonry cavity wall applications.\u003c\/p\u003e\n\u003cp data-end=\"618\" data-start=\"341\"\u003eThe board is available in thicknesses ranging from 40mm to 100mm and provides effective thermal performance while maintaining the required cavity width. The foil facing helps to enhance thermal efficiency and contributes to the overall performance of the wall construction.\u003c\/p\u003e","brand":"Soprema","offers":[{"title":"40mm – 1 Pallet Only (16 Packs \/ 120.96m²)","offer_id":52110905278811,"sku":"52110905278811","price":1234.0,"currency_code":"GBP","in_stock":true},{"title":"50mm (11 boards = 5.94m²) - Per pack","offer_id":52110905311579,"sku":"52110905311579","price":72.2,"currency_code":"GBP","in_stock":true},{"title":"60mm (10 boards = 5.40m²) - Per pack","offer_id":52110905344347,"sku":"52110905344347","price":90.1,"currency_code":"GBP","in_stock":true},{"title":"75mm (8 boards = 4.32m²) - Per pack","offer_id":52110905377115,"sku":"52110905377115","price":70.2,"currency_code":"GBP","in_stock":true},{"title":"85mm – 1 Pallet Only (16 Packs \/ 60.48m²)","offer_id":52110905409883,"sku":"52110905409883","price":1345.0,"currency_code":"GBP","in_stock":true},{"title":"100mm (6 boards = 3.24m²) - Per pack","offer_id":52110905442651,"sku":"52110905442651","price":68.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7763\/0299\/files\/Soprema_Sopratherm_CW4000.webp?v=1769430140"}],"url":"https:\/\/www.nationalinsulationsupplies.com\/collections\/partial-fill-cavity-wall-insulation.oembed","provider":"National Insulation Supplies","version":"1.0","type":"link"}