Products > Therma > Thermafit > Overview Thermafit Flexible pitched roof board Kingspan Thermafit Properties Download PDF Thermal conductivity 0.027 W/m.K Compressive strength at 10% compression 140 kPa Facings Composite foil Core High performance rigid thermoset polyisocyanurate (PIR) insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). Board size 1.2 x 0.37 m