The best thing for a roof is above-rafter insulation with its structural benefits. Polyurethane, a high-performance insulation material, has a thermal conductivity level up to λ_D=0.022 W/(mK), making its insulating effect around two thirds better than traditional insulation of the same thickness. In the process, the roof is fully covered on one layer, ensuring no untight areas are created. Due to the absence of thermal bridges, it is particularly energy-efficient. In addition, no living space is lost—the roof grows towards the outside and the attic floor is habitable during the entire building project.

Property: Homeless shelter in Riedlingen, Germany
Construction project : Restoration

Product used:
Over-rafter insulation LINITHERM PAL N+F, 120 mm

Thanks to the low thermal conductivity [λ_D=0.022 W/(mK)] of rigid PU foam, minimal structure heights can be realised. A positive aspect for new buildings, but also for the restoration of old buildings where every millimetre counts. In particular, however: The floor can withstands loads right away. No dirt or water in the house, no waiting, no drying times as is the case with screed.