Products > Kooltherm > Kooltherm K3 Floorboard > Overview Kooltherm K3 Floorboard Insulation for floors Kingspan Kooltherm K3 Floorboard Properties Download PDF Thermal conductivity (insulant thickness) 0.021 W/m.K ( 25–44 mm) 0.020 W/m.K ( ≥ 45 mm) Compressive strength at 10% compression 120 kPa Facings Composite Foil Core Premium performance rigid thermoset modified resin insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). Board size 1.2 x 2.4 m