Bulk Buy - 150mm Knauf Loft Roll 44 Combi-cut 1140mm x 8.05m - 9.18m2 per roll

Stocking up on the 150mm Knauf Loft Roll 44 Combi-cut in bulk is a sensible way to control material costs on larger loft projects, particularly the ones where insulation is layered up to reach the depth you're after. This mid-depth glass mineral wool roll is made for cold pitched roofs at ceiling level, and can also sit between joists in suspended timber floors. Its usual job is as a cross-laid overlay: run at right angles over a base layer between the joists, it lifts the overall depth and breaks up thermal bridging across the timber for steadier performance. Where 150mm is enough on its own, it does the job as a single primary layer instead. Light to lift & simple to cut, it keeps the work manageable even for anyone tackling a loft for the first time. It has a thermal conductivity of 0.044 W/mK and a thermal resistance of 3.40 m²K/W, and as a glass mineral wool it adds a degree of acoustic absorption alongside the thermal side, softening airborne sound through the ceiling. Each roll is 1140mm wide and 8.05m long, covering 9.18m², and the combi-cut perforations let you split it into 2 x 570mm or 3 x 380mm widths to match standard joist centres, or leave it whole for a full-width cross-laid run that cuts down on offcuts. Like the rest of the range, it's made with ECOSE® Technology, Knauf's bio-based binder, so there's no added formaldehyde or phenol, it's CFC & HCFC free, and it carries zero ozone depletion potential, with up to 80% recycled glass in every roll. It's rot proof, odourless & non-hygroscopic, won't draw in vermin or feed mould, fungi or bacteria, and lasts the life of the building. A dependable pick for retrofit & new build alike. Benefits Buying in bulk offers better value on larger projects and helps keep material costs down Thermal conductivity of 0.044 W/mK for reliable, effective thermal performance Thermal resistance (R-value) of 3.40 m²K/W for the 150mm roll Euroclass A1 non-combustible: the best possible fire classification, meaning the product does not burn Combi-cut format, partially perforated at 2 x 570mm & 3 x 380mm to suit standard joist centres Ideal as a cross-laid overlay: lay perpendicular to the base layer to reduce thermal bridging Also suitable as a primary single layer between joists, or in suspended timber floors Lightweight, low-itch & easy to handle on site Manufactured with ECOSE® Technology, a bio-based binder with no added formaldehyde or phenol Made with up to 80% recycled glass content: CFC free, HCFC free, with zero ozone depletion potential Rot proof, odourless & non-hygroscopic: will not attract vermin or support mould or fungi BRE Green Guide rating A+ Good to know Each roll covers 9.18m² Thickness: 150mm; width: 2 x 570mm or 3 x 380mm; length: 8.05m Thermal resistance: 3.40 m²K/W; vapour resistivity: 5.00 MNs/g.m 100mm base plus a 150mm cross-laid layer gives 250mm total, just below the 270mm commonly specified in England & Wales 100mm base plus two 150mm cross-laid layers gives 400mm total, for a U-value of approximately 0.11 W/m²K where maximum performance is wanted Keep insulation clear of downlights & other heat-producing fixtures, using non-combustible covers where required Store indoors, dry & flat; protect from prolonged sunlight & moisture Always refer to the Knauf Loft Roll Installation Guide before installation