Knauf 170mm Insulation Space Standard Top Up Loft Roll - 6.47m2 - The Knauf Insulation Space Loft Roll is a glass mineral wool insulation roll which is designed for use in cold lofts where pitched roofs are insulated at ceiling level, that offers thermal performance. It is non-combustible insulation with the best possible Euroclass A1 reaction to fire classification, and is manufactured using Knauf Insulation's unique plant-based binder, ECOSE technology.