Knauf loft insulation will save you a lot of money by reducing heat loss through your roof. 35% of your heat is lost through your roof. Loft insulation can reduce heating bills by £350 per year (rising to huge savings of £700 to 1000/ year from late 2022 due to rising energy costs). Even making your loft insulation thicker to the recommended 270mm can save £200-300 per year, or you can go even further and aim for passivhaus standards with around 450mm thick insulation. PassivHaus design means you can use very little or no heating. Application Knauf Loft Roll Insulation is primarily used for the thermal insulation of pitched roofs at ceiling level and it can also be used to thermally insulate floors. When used to insulate at ceiling level it is usually laid in two layers, with the first layer between the joists and the second thick top layer over, and at right angles to the joists. Product Features * Lightweight and economic insulation quilt * Provides thermal, acoustic and fire performance * Non-combustible * Very Low Itch (nice to install and nothing like the old itchy fibreglass) * ECOSE Technology - softer to handle compared with traditional mineral wool Product Specifications * Thickness options, 100mm base layer, 170mm top layer, 200mm super top up layer * Roll Width 1140mm * Roll Length 100mm thick 9.72m, 170mm thick 5.68m, 200mm thick 4.83m * Roll Coverage, 100mm covers 11.08m2, 170mm covers 6.47m2, 200mm covers 5.5m2 * Combi-Cut Roll. Partially-cut to suit 400mm or 600mm joist centers for easier insulation * R-Value (thermal resistance) 100mm = 2.25, 170mm = 3.85m, 200mm = 4.4m3/K/W * Thermal Conductivity 0.044 W/mK * Standard EN 13162 * Material, Mineral Wool * Can be used in conjunction with top-up layers and loft storage solutions such as Loftlegs Environmental