{"product_id":"bulk-buy-200mm-knauf-loft-roll-44-combi-cut-1140mm-x-6-00m","title":"Bulk Buy - 200mm Knauf Loft Roll 44 Combi-cut 1140mm x 6.00m - 6.84m2 per roll","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBuying the 200mm Knauf Loft Roll 44 Combi-cut in bulk makes sense on projects where the aim is to drive heat loss as low as it will go, as the thickest roll Knauf offer in this range. Worked over a 100mm base layer between the joists, it lifts the total depth to 300mm, comfortably past the 270mm used to meet the 0.16 W\/m²K roof target under Part L of the Building Regulations. Push it further with two 200mm layers cross-laid over the base and the total reaches 500mm, dropping the U-value to roughly 0.09 W\/m²K, the standard of insulation you'd expect to find specified in a new build. It's intended for cold pitched roofs at ceiling level, and is equally at home between joists in suspended timber floors.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003ePerformance sits at 0.044 W\/mK thermal conductivity with a thermal resistance of 4.50 m²K\/W, the highest in the range, and as a glass mineral wool it carries a measure of acoustic absorption too, quietening airborne sound through the ceiling. Each roll is 1140mm wide by 6.00m long, giving 6.84m² of cover, and the combi-cut perforations split it to 2 x 570mm or 3 x 380mm for standard joist centres, or leave it whole for a full-width cross-laid run with little waste. The extra thickness still handles easily: light to carry up into the loft and quick to cut, well within reach of a capable DIYer as much as a trade crew.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eIt's made with ECOSE® Technology, Knauf's bio-based binder, so there's no added formaldehyde or phenol, it's CFC \u0026amp; HCFC free, and it carries zero ozone depletion potential, with up to 80% recycled glass in every roll. Rot proof, odourless \u0026amp; non-hygroscopic, it won't draw vermin or feed mould, fungi or bacteria, and it lasts the life of the building. A dependable choice for retrofit \u0026amp; new build projects where thermal performance is the priority.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBuying in bulk offers better value on larger projects and helps keep material costs down\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe thickest roll in the range, ideal for maximising loft performance and future-proofing the specification\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance (R-value) of 4.50 m²K\/W for the 200mm roll, the highest in the range\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal conductivity of 0.044 W\/mK for reliable, effective thermal performance\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 non-combustible: the best possible fire classification, meaning the product does not burn\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCombi-cut format, partially perforated at 2 x 570mm \u0026amp; 3 x 380mm to suit standard joist centres\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAlso suitable as a primary single layer between joists, or in suspended timber floors\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLightweight, low-itch \u0026amp; easy to handle on site\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eManufactured with ECOSE® Technology, a 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\"\u003eMade with up to 80% recycled glass content: CFC free, HCFC free, with zero ozone depletion potential\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRot proof, odourless \u0026amp; non-hygroscopic: will not attract vermin or support mould or fungi\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBRE Green Guide rating A+\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEach roll covers 6.84m²\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e100mm base plus a 200mm cross-laid layer gives 300mm total, for a U-value of approximately 0.14 W\/m²K, beyond the 270mm Part L standard\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e100mm base plus two 200mm cross-laid layers gives 500mm total, for a U-value of approximately 0.09 W\/m²K, the level typically specified in new build\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThickness: 200mm; width: 2 x 570mm or 3 x 380mm; length: 6.00m\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance: 4.50 m²K\/W; vapour resistivity: 5.00 MNs\/g.m\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eKeep insulation clear of downlights \u0026amp; other heat-producing fixtures, using non-combustible covers where required\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStore indoors, dry \u0026amp; flat; protect from prolonged sunlight \u0026amp; moisture\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAlways refer to the Knauf Loft Roll Installation Guide before installation\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":59956511670606,"sku":"BM005979-BULK","price":28.52,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-loft-roll-44-combi-cut-200mm-bm005979-mineral-fibre-insulation-1172610116.jpg?v=1749629052","url":"https:\/\/www.insulationuk.co.uk\/products\/bulk-buy-200mm-knauf-loft-roll-44-combi-cut-1140mm-x-6-00m","provider":"Insulation UK","version":"1.0","type":"link"}