This A1 Non-Combustible Glass Mineral Wool roll, manufactured using Knauf Insulation's unique ECOSE® Technology, is designed specifically for use in cold lofts where pitched roofs are insulated at ceiling level. The Combi-cut products are supplied partially perforated, providing the flexibility to be used between joists or uncut as a full-width roll, maximizing on-site efficiency. Manufactured in long lengths to allow quick and simple installation, this insulation is compression packed and lightweight for easy handling and moving around a site. It is certified A1 non-combustible, the highest level of fire performance available, and is made using Knauf Insulation's innovative ECOSE Technology, making the rolls soft to touch and easier to handle. The thermal conductivity value is 0.044 W/mK, and it comes in 1140mm wide rolls with perforations at 570mm and 380mm centres, allowing it to fit easily between roof rafters or floor joists.