Products > Therma > Therma TF70 > Overview Therma TF70 Insulation for solid concrete and suspended ground floors Kingspan Therma TF70 Properties Download PDF Thermal conductivity 0.022 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 2.4 m