Kingspan Kooltherm K108 Cavity Board is a premium performance insulation with a fibre-free rigid thermoset phenolic core. Kooltherm K108 is a premium performance partial fill cavity wall insulation solution. It has a thermal conductivity of 0.019 W/mK and can achieve the same wall U-value as alternative products with a thinner profile. Its low thermal conductivity can maximise usable internal floor space. Premium performance rigid thermoset phenolic insulation – thermal conductivity of 0.019 W/mK Clear cavity is maintained ð resists moisture penetration Low emissivity foil facings significantly increase the thermal resistance of the cavity Meets NHBC technical requirements when used with a 50 mm cavity. Low emissivity foil facings significantly increase the thermal resistance of the cavity Meets NHBC technical requirements when used with a 50 mm cavity. Unaffected by air infiltration Easy to handle and install Non-deleterious material