Products Overview | Wall | Non-Itch Timber Frame Insulation Timber Frame Insulation Slab Calculations The table below shows the U-values achieved using Non-Itch Timber Frame Insulation slabs placed between the studs. Non-Itch Timber Frame Insulation Slabs including YBS Breather-Foil FR Thickness Stud Thickness Thermal Conductivity U-value W/M²K 90mm 89mm 0.039 W/mk 0.33 90mm 89mm 0.0425 W/mk 0.34 140mm 140mm 0.039 W/mk 0.25 140mm 140mm 0.0425 W/mk 0.26 Non-Itch Timber Frame Insulation Slabs including standard breather membrane Thickness Stud Thickness Thermal Conductivity U-value W/M²K 140mm 140mm 0.039 W/mk 0.28 140mm 140mm 0.0425 W/mk 0.31 Overview Installation Technical Calculations Data Sheet Quick, clean and easy to install No protective clothing Free from floating fibres Direct equivalent to glass fibre insulation Totally recyclable