{"title":"Knauf DriTherm Cavity Slab 37","description":"","products":[{"product_id":"50mm-knauf-insulation-dritherm®-cavity-slab-37-1-2m-x-455mm-12-per-pack","title":"50mm Knauf Insulation DriTherm® Cavity Slab 37  1.2m x 455mm (12 per pack)","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e50mm Knauf Insulation DriTherm® Cavity Slab 37 is the slimmest slab Knauf produces in the DriTherm® range, made for narrow cavities where a thicker full fill is not an option. Thermal resistance is 1.35 m²K\/W at a thermal conductivity of 0.037 W\/mK.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eSlabs are 1200mm x 455mm and supplied 12 per pack, covering 6.552m², which is the joint largest pack coverage across the whole DriTherm® range.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eNarrow cavities are common in garages, outbuildings, boundary walls and older cavity constructions being extended or made good. The slab is friction fitted between wall ties as the masonry goes up, exactly as the deeper slabs are, so the method does not change with the thickness.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlimmest slab in the DriTherm® range at 50mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance of 1.35 m²K\/W\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.037 W\/mK\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e12 slabs per pack covering 6.552m², the joint largest pack coverage in the range\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1200mm x 455mm slabs to suit standard vertical wall tie spacings\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWater-repellent glass mineral wool\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 non-combustible\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFriction fitted between wall ties without ancillary products\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCovered by BBA Agrément Certificate 95\/3212\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDesigned for a 50mm cavity; a thicker cavity needs a thicker slab, not two thin layers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNarrow cavities leave less tolerance for mortar snots and debris, so keep the cavity clean\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCuts cleanly with an insulation saw or serrated knife\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlabs are light and comfortable to handle\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMade with ECOSE® Technology, generating low levels of dust and VOCs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStore under cover, off the ground and out of prolonged sunlight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":52655593161038,"sku":"BM004684","price":23.17,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-dritherm-cavity-slab-37-1200mm-x-455mm-x-50mm-bm004684-mineral-fibre-insulation-1172607673.jpg?v=1749584284"},{"product_id":"75mm-knauf-insulation-dritherm®-cavity-slab-37-1-2m-x-455mm-8-per-pack","title":"75mm Knauf Insulation DriTherm® Cavity Slab 37  1.2m x 455mm (8 per pack)","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e75mm Knauf Insulation DriTherm® Cavity Slab 37 is a water-repellent glass mineral wool slab for external full-fill masonry cavity walls, giving a thermal resistance of exactly 2.00 m²K\/W at a thermal conductivity of 0.037 W\/mK. Slabs are 1200mm x 455mm, supplied 8 per pack and covering 4.368m².\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eHandling is a real consideration on a job with a lot of cavity to fill. Slabs made with ECOSE® Technology use a bio-based binder containing no added formaldehyde or phenol, made from rapidly renewable raw materials and 70% less energy-intensive to manufacture than traditional binders. The practical result on site is a slab that is soft to touch, comfortable to handle and low in dust.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThat matters most on the days when someone is cutting and fitting slabs from first lift to last.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance of 2.00 m²K\/W\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.037 W\/mK\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eECOSE® Technology bio-based binder with no added formaldehyde or phenol\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSoft to touch, comfortable to handle and low in dust\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e70% less energy-intensive to manufacture than traditional binders\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1200mm x 455mm slabs, 8 per pack covering 4.368m²\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWater-repellent glass mineral wool\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 non-combustible\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCovered by BBA Agrément Certificate 95\/3212\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSuits a 75mm cavity; slab thickness should match cavity width\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInstalled as the wall is built, friction fitted between wall ties\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eKeep slabs tightly butted so there is no gap between adjacent slabs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCuts cleanly with standard insulation tools\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCertified by EUCEB as made from non-classified fibres\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePackaging offers short-term protection only; store under cover for anything longer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":52655594635598,"sku":"BM004674","price":18.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-dritherm-cavity-slab-37-1200mm-x-455mm-x-75mm-bm004674-mineral-fibre-insulation-1172607667.jpg?v=1749584165"},{"product_id":"100mm-knauf-insulation-dritherm®-cavity-slab-37-1-2m-x-455mm-12-per-pack","title":"100mm Knauf Insulation DriTherm® Cavity Slab 37  1.2m x 455mm (12 per pack)","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003ePack coverage is where 100mm Knauf Insulation DriTherm® Cavity Slab 37 stands apart. At 12 slabs per pack covering 6.552m², it carries more wall area per pack than any other 100mm slab in the DriTherm® range, which shows up in cost per square metre and in how many packs need moving around a busy plot.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThermal resistance is 2.70 m²K\/W at a thermal conductivity of 0.037 W\/mK, from 1200mm x 455mm slabs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eFor volume housebuilding on a standard 100mm cavity where the target U-value is achievable at this grade, that combination is difficult to argue with: the same certification, the same installation method and the same Euroclass A1 fire performance as the higher grades, delivered across more square metres per pack.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLargest pack coverage of any 100mm DriTherm® slab at 6.552m², 12 slabs per pack\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance of 2.70 m²K\/W\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.037 W\/mK\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1200mm x 455mm slabs to suit standard vertical wall tie spacings\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFewer packs to handle and store per square metre of wall\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWater-repellent glass mineral wool\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 non-combustible\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFriction fit between wall ties with no ancillary products\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCovered by BBA Agrément Certificate 95\/3212\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCheck the target U-value first; if 37 grade does not reach it, the 34 or 32 slab in the same thickness will\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSuits a nominal 100mm cavity\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLarger packs are heavier, so plan offloading and site storage\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlabs must be tightly butted to maintain continuous coverage\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCompression packaging means less packaging waste per square metre\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStore indoors or under cover, off the ground and protected from the elements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":52655596470606,"sku":"BM003406","price":35.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-dritherm-cavity-slab-37-1200mm-x-455mm-x-100mm-bm003406-mineral-fibre-insulation-1172607661.jpg?v=1749584050"},{"product_id":"125mm-knauf-insulation-dritherm®-cavity-slab-37-1-2m-x-455mm-6-per-pack","title":"125mm Knauf Insulation DriTherm® Cavity Slab 37  1.2m x 455mm (6 per pack)","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e125mm Knauf Insulation DriTherm® Cavity Slab 37 is a water-repellent glass mineral wool slab for external full-fill masonry cavity walls, giving a thermal resistance of 3.35 m²K\/W at a thermal conductivity of 0.037 W\/mK. Slabs are 1200mm x 455mm and supplied 6 per pack, covering 3.276m².\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eWidening the cavity is the alternative to upgrading the grade, and it is frequently the cheaper of the two. A 125mm slab at 37 grade delivers more thermal resistance than a 100mm slab at 32 grade, which is worth checking against the wall build-up before defaulting to the higher specification product.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe construction cost of the wider cavity has to be weighed against the saving on the slab, but on schemes where the cavity width is not yet fixed, it is a calculation worth doing.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance of 3.35 m²K\/W\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.037 W\/mK\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOutperforms a 100mm slab in the highest DriTherm® grade\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1200mm x 455mm slabs, 6 per pack covering 3.276m²\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWater-repellent additive resists moisture ingress\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 non-combustible\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFull fill without cavity barriers under Approved Document B\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCarries the CCPI mark for clear and accurate product information\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBES 6001 'Very Good' responsible sourcing rating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWidening a cavity affects wall ties, lintels, trays and reveals, so cost the whole build-up\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlab thickness must match cavity width for a full fill\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eU-value calculations should follow BS EN ISO 6946 or BS EN ISO 10211 with BR443 guidance\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eButt slabs tightly at every joint\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlabs are light and comfortable to handle\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStore dry and flat, protected from prolonged sunlight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":52655602925902,"sku":"BM007508","price":22.82,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-dritherm-cavity-slab-37-1200mm-x-455mm-x-125mm-bm007508-mineral-fibre-insulation-1172607655.jpg?v=1749583932"},{"product_id":"150mm-knauf-insulation-dritherm®-cavity-slab-37-1-2m-x-455mm-8-per-pack","title":"150mm Knauf Insulation DriTherm® Cavity Slab 37  1.2m x 455mm (8 per pack)","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e150mm Knauf Insulation DriTherm® Cavity Slab 37 is the deepest slab in the 37 range, giving a thermal resistance of 4.05 m²K\/W at a thermal conductivity of 0.037 W\/mK. Slabs measure 1200mm x 455mm and are supplied 8 per pack, covering 4.368m².\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eHeight limits are worth checking whenever a full-fill cavity gets this deep, because they govern the construction rather than the slab. DriTherm® Cavity Slabs are approved for use in buildings up to 12m high in any exposure zone, subject to the requirements of the BBA certification being met, and for multi-storey applications up to 25m in height.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eBeyond a thermal figure, that certificated scope is what allows the same product to run from a two-storey house to a mid-rise block.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance of 4.05 m²K\/W, the highest available in DriTherm® 37\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.037 W\/mK\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eApproved for buildings up to 12m in any exposure zone\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eApproved for multi-storey applications up to 25m in height\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1200mm x 455mm slabs, 8 per pack covering 4.368m²\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWater-repellent glass mineral wool\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 non-combustible\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eManufactured to BS EN 13162 under ISO 9001, 14001, 45001 and 50001 certified systems\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLife equivalent to that of the wall structure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHeight and exposure zone both govern the approved scope, so establish them at design stage\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eA 150mm cavity needs ties, lintels and cavity trays specified for the width\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlab thickness must match cavity width for a genuine full fill\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eKeep slabs tightly butted so no gaps form in the insulation layer\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCover exposed work at the end of each day and in heavy rain\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlabs are rot proof, non-hygroscopic and will not sustain vermin\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":52655603384654,"sku":"BM005984","price":36.92,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-dritherm-cavity-slab-37-1200mm-x-455mm-x-150mm-bm005984-mineral-fibre-insulation-1172607649.jpg?v=1749583815"},{"product_id":"65mm-knauf-insulation-dritherm®-cavity-slab-37-1-2m-x-455mm-10-per-pack","title":"65mm Knauf Insulation DriTherm® Cavity Slab 37  1.2m x 455mm (10 per pack)","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eNot every cavity is a round number, and 65mm Knauf Insulation DriTherm® Cavity Slab 37 exists for the ones that are not. It returns a thermal resistance of 1.75 m²K\/W at a thermal conductivity of 0.037 W\/mK, filling a 65mm cavity completely rather than leaving the void a nominal 50mm or 75mm slab would.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eSlabs measure 1200mm x 455mm and are supplied 10 per pack, covering 5.460m².\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eThe 455mm slab width is deliberate. It matches standard vertical wall tie spacings, so each slab drops between the ties and closes tight against the one below it. Coverage figures assume that fit, which is why measuring the cavity and the tie spacing before ordering is worth the five minutes.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSized for a 65mm cavity where a 50mm or 75mm slab would not fully fill\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance of 1.75 m²K\/W\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.037 W\/mK\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e455mm width matched to standard vertical wall tie spacings\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e10 slabs per pack covering 5.460m²\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWater-repellent additive resists moisture ingress\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 non-combustible\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFull fill without cavity barriers under Approved Document B\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eProduct declaration in conformity with BS EN 13162\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMeasure the built cavity width, not the drawing, before committing to a thickness\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eA partially filled cavity does not perform as a full-fill construction\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eButt slabs tightly at every joint to keep the layer continuous\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlabs adapt to slight imperfections in the substrate, unlike rigid boards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAwarded the Eurofins Gold Certificate for Indoor Air Comfort\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDamaged, contaminated or wet slabs must not be used\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":53007276736846,"sku":"BM010026","price":20.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-dritherm-cavity-slab-37-1200mm-x-455mm-x-50mm-bm004684-mineral-fibre-insulation-1172607673.jpg?v=1749584284"},{"product_id":"85mm-knauf-insulation-dritherm®-cavity-slab-37-1-2m-x-455mm-8-per-pack","title":"85mm Knauf Insulation DriTherm® Cavity Slab 37  1.2m x 455mm (8 per pack)","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e85mm Knauf Insulation DriTherm® Cavity Slab 37 fills an 85mm masonry cavity completely, returning a thermal resistance of 2.25 m²K\/W at a thermal conductivity of 0.037 W\/mK. Slabs measure 1200mm x 455mm and are supplied 8 per pack, covering 4.368m².\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eFull-fill mineral wool simplifies the fire strategy for a cavity wall. Because DriTherm® Cavity Slabs are non-combustible with a Euroclass A1 reaction to fire classification and the cavity is completely filled, cavity barriers are not required to meet Approved Document B requirements. On a partial-fill build-up, those barriers are an additional product, an additional trade interface and an additional inspection point.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003eInstall as the wall is built, friction fitted between the leaves and between wall ties.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance of 2.25 m²K\/W in an 85mm full-fill cavity\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.037 W\/mK\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 non-combustible, the highest classification available\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFull-fill solution that does not require cavity barriers under Approved Document B\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1200mm x 455mm slabs, 8 per pack covering 4.368m²\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWater-repellent additive resists moisture ingress\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNo retaining discs, clips or jointing tape required\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eApproved for masonry cavity walls up to 25 metres in height\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eManufactured to BS EN 13162\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" 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=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFire strategy is a whole-building matter; confirm requirements against the project specification\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAn 85mm slab is for an 85mm cavity, not a partial fill of something wider\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWall ties should be specified to suit the cavity width\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eButt slabs tightly and keep the cavity free of mortar droppings\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlabs will not encourage the growth of fungi, mould or bacteria\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCover exposed slab faces at the end of each day's work or in heavy rain\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":54557219815758,"sku":"BM009978","price":20.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-dritherm-cavity-slab-37-1200mm-x-455mm-x-50mm-bm004684-mineral-fibre-insulation-1172607673.jpg?v=1749584284"}],"url":"https:\/\/www.insulationuk.co.uk\/collections\/knauf-dritherm-cavity-slab-37.oembed","provider":"Insulation UK","version":"1.0","type":"link"}