180mm Knauf FactoryClad Roll 40 (Uncut) 6.26m x 1.2m - 7.51m2 per roll

180mm Knauf FactoryClad Roll 40 is a glass mineral wool insulation roll for built-up metal roof and wall systems, specified where the thermal target justifies committing real depth to the cavity. It is worth being clear about what that commitment means. Once the spacer system is up and the outer profiled sheet is fixed, the quilt is closed in and stays there for the service life of the cladding. Nothing about it gets revisited, topped up or swapped, which puts the emphasis on long-term stability rather than headline figures alone. Each roll measures 6.26m by 1200mm and covers 7.51m², with 24 rolls to a pallet giving 180.29m². Declared thermal conductivity is 0.040 W/mK, giving a thermal resistance of 4.50 m²K/W, and water vapour resistivity is 5.00 MNs/g.m. Published embodied carbon is 1.56 kgCO2e/m² across stages A1 to A3 and 2.06 kgCO2e/m² across A1 to C4. Glass mineral wool suits that sealed-in condition. There is no blowing agent in it to diffuse out over time, so the declared conductivity is the figure it works to. It is odourless and rot proof, it is non-hygroscopic, it does not sustain vermin, and it will not encourage the growth of fungi, mould or bacteria. Knauf state that the product will have a life equivalent to that of the structure it is incorporated into. In an inaccessible cavity behind a metal skin, none of that is a small consideration. Installation follows the standard build-up, with the liner sheet fixed first, the quilt laid over it, the spacer system brought up to take it into the cavity and the outer sheet fixed last, to Knauf Insulation's guidance and the cladding system manufacturer's details. One point is worth raising at this depth: Knauf declare the product's characteristics on its Declaration of Performance and in its published literature, and where a system's performance depends on anything beyond those declared characteristics, they ask to be contacted before it is built, because the warranty position rests on it. Knauf also carry out the U-value calculation itself, simplified to BS EN ISO 6946:2017 or numerically modelled to BS EN ISO 10211:2017 where the detailing calls for it. On new agricultural units this depth tends to appear where the building works as plant rather than shelter, in potato and onion stores, controlled-atmosphere stores and grain buildings running drying equipment, where the envelope is designed alongside the kit inside it. Key Benefits of Knauf FactoryClad Roll 40: Thermal resistance of 4.50 m²K/W at 180mm. Declared thermal conductivity of 0.040 W/mK. Euroclass A1 reaction to fire, non-combustible to BS EN 13501-1. 7.51m² per roll, and 180.29m² per pallet across 24 rolls. No blowing agent in the product, so it works to its declared conductivity. Service life equivalent to that of the structure it is built into, as stated by Knauf. Odourless, rot proof and non-hygroscopic, and will not sustain vermin or support fungal, mould or bacterial growth. Covered by Declaration of Performance G4207GPCPR. 1200mm roll width to suit commonly used rail and bracket spacer systems. Absorbs sound behind metal liner sheets, reducing internal reverberation. Bound with ECOSE® Technology, with no added formaldehyde or phenol. Good to know: Closed in for the life of the cladding: the quilt is not accessible once the outer sheet is fixed, so get the depth and the spacer system right before the skin goes on. Euroclass A1 is a reaction to fire classification, not a fire resistance period: it describes how the material itself behaves in a fire. Any resistance period claimed for the roof or wall belongs to the tested assembly, so check the fire strategy for the building rather than reading it off the quilt. Declared performance and system performance are different things: Knauf declare product characteristics on the DoP and in their literature, and ask to be contacted where a system relies on anything beyond that. Knauf will calculate the U-value for the specific build-up, simplified to BS EN ISO 6946:2017 or numerically modelled to BS EN ISO 10211:2017. The 40 denotes a declared conductivity of 0.040 W/mK, not a thickness. Supplied uncut at 6.26m per roll and unfaced on both faces. Non-hygroscopic, but not a moisture-resistant product. Keep it dry and covered, and discard any roll that has taken water. Specify 180mm once and it stays specified, which is the argument for a quilt that works to its declared figure and lasts as long as the building around it.