125mm Kingspan TW55 ThermaWall PIR Insulation Board 2.4m x 1.2m Next Day Delivery so the floor gets a

so the floor gets a single set of joints to butt and seal rather than two offset layers

helping to reduce gaps and minimise thermal bridging across the wall insulation layer

Choosing RS140 over a lighter Rocksilk® slab is not a thermal decision

ensuring durability and long-term reliability

It is normally used to level

125mm Kingspan TW55 ThermaWall PIR Insulation Board 2.4m x 1.2m Next Day Delivery so the floor gets a125mm Kingspan Thermawall TW55 is a rigid thermoset polyisocyanurate (PIR) insulation board faced both sides with a low emissivity composite foil, supplied in 2400mm x 1200mm sheets covering 2. 88m. Declared thermal resistance is 5. 65 mK W at a thermal conductivity of 0. 022 W mK. Steel frame is where this thickness comes into its own. Kingspan's insulated sheathing tables run to 125mm for steel frames at 600 centres, showing 0. 15 W mK behind 102.