{"product_id":"240mm-knauf-factoryclad-roll-40-uncut-4-7m-x-1-2m","title":"240mm Knauf FactoryClad Roll 40 (Uncut) 4.7m x 1.2m - 5.64m2 per roll","description":"\u003cp\u003e\u003c!--StartFragment --\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e240mm Knauf FactoryClad Roll 40 is a glass mineral wool insulation roll for built-up metal roof and wall systems, and the one thickness in the range that breaks the usual trade-off. Across the rest of the range, going deeper means shorter rolls and less coverage from each one. At 240mm the roll runs 4.70m against the 220mm roll's 4.35m, so it covers 5.64m² where the 220mm covers 5.22m², and a pallet delivers 135.36m² against 125.28m². Stepping up to 240mm gains thermal resistance and area per roll at the same time, which is worth checking if the two depths were being compared on quantities.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eDeclared thermal conductivity is 0.040 W\/mK, giving a thermal resistance of 6.00 m²K\/W, and water vapour resistivity is 5.00 MNs\/g.m. Published embodied carbon is 2.07 kgCO2e\/m² across stages A1 to A3 and 2.75 kgCO2e\/m² across A1 to C4. Rolls are supplied uncut at 1200mm wide, unfaced, 24 to a pallet.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThere is a point about calculation that becomes important at this depth. The U-value of a built-up system depends on the material properties and on the degree of thermal bridging through it, and once the quilt is 240mm deep the wool is no longer the limiting factor: the spacer brackets penetrating the layer are. A simplified calculation may not capture that adequately. Knauf's own guidance is that U-values for a proprietary system should be produced using 2D or 3D modelling software compliant with BS EN ISO 6946:2017 or BS EN ISO 10211:2017, following BR443:2019, and they will carry out numerically modelled calculations where the detailing calls for it. They also publish a psi-value calculator for the junctions. Specifying 240mm and then accepting a rough U-value figure wastes most of what the depth bought.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe build-up itself is unchanged: liner sheet fixed, quilt laid over it, spacer system brought up to take the quilt into the cavity, outer profiled sheet fixed last, all to Knauf Insulation's guidance and the cladding system manufacturer's details. Bracket height and fixing lengths need confirming against 240mm before ordering. The depth suits industrial, commercial and agricultural buildings carrying a continuous heating or cooling load rather than seasonal use, and on farms that points to intensive livestock housing running heat through the year, such as farrowing houses and calf rearing units, and to refrigerated produce stores where the plant runs constantly and depth pays back against running cost.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eKey Benefits of Knauf FactoryClad Roll 40:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\" 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 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThermal resistance of 6.00 m²K\/W at 240mm.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLonger roll and greater coverage than the 220mm, at 4.70m and 5.64m² against 4.35m and 5.22m².\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDeclared thermal conductivity of 0.040 W\/mK.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEuroclass A1 reaction to fire, non-combustible to BS EN 13501-1.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e135.36m² per pallet across 24 rolls.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1200mm roll width to suit commonly used rail and bracket spacer systems.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eKnauf will produce numerically modelled U-value calculations for the specific build-up.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAbsorbs sound behind metal liner sheets, reducing internal reverberation.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRot proof and non-hygroscopic, and will not sustain vermin or support fungal or mould growth.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMade with up to 80% recycled content and bound with ECOSE® Technology.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePerformance declared under G4207GPCPR against BS EN 13162:2012+A1:2015.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\" 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 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eThe 240mm roll is longer than the 220mm:\u003c\/strong\u003e 4.70m against 4.35m. It is the only increase in the range that gains coverage rather than losing it, so compare the two on rolls required, not on thickness alone.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAt this depth the brackets govern the U-value, not the wool:\u003c\/strong\u003e ask for a modelled calculation to BS EN ISO 10211:2017 rather than a simplified figure, and look at the junction psi-values too.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eConfirm the spacer system carries 240mm:\u003c\/strong\u003e bracket height and fixing lengths need checking rather than assuming, on walls as well as roofs.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAvailable in the 40 grade only. FactoryClad Roll 35 stops at 220mm and Roll 32 is made in 80mm.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe 40 denotes a declared conductivity of 0.040 W\/mK, not a thickness.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNon-hygroscopic, but not moisture resistant. Keep it dry and covered, and discard any roll that has taken water.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHandle without crushing the roll edges, and discard damaged product rather than installing it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e240mm gives you 6.00 m²K\/W and, unusually for this range, more coverage per roll than the thickness below it.\u003c\/p\u003e\n\u003cp\u003e\u003c!--EndFragment --\u003e\u003c\/p\u003e","brand":"Knauf","offers":[{"title":"Default Title","offer_id":55262211899726,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/1083\/0670\/files\/knauf-knauf-insulation-factoryclad-roll-40-uncut-300mm-3-20m-x-1-2m-bm005980-mineral-fibre-insulation-1216519862.png?v=1768397833","url":"https:\/\/www.insulationuk.co.uk\/products\/240mm-knauf-factoryclad-roll-40-uncut-4-7m-x-1-2m","provider":"Insulation UK","version":"1.0","type":"link"}