Products > Therma > Therma TW52 > Overview Therma TW52 Insulated dry-lining plasterboard for plaster-dab / adhesive bonding Kingspan Therma TW52 Properties Download PDF Thermal conductivity 0.026 W/m.K 0.19 W/m.K (plasterboard component) Front Facing 12.5mm plasterboard 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). Reverse Facing Kraft paper Board size 1.196 x 2.436 m