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Description Kingspan Kooltherm K108 Cavity Board is a performance rigid thermoset fibre-free phenolic insulation core faced on both sides with a low emissivity composite foil. It is designed to limit thermal bridging and uncontrolled airleakage via junctions in cavity wall constructions. It has a thermal conductivity of 0.019W/mK across all different types of thicknesses with a thermal resistance of 2.1m2K/W-7.85m2K/W Feautres: Partial fill cavity wall insulation. Kooltherm K108 has a thermal conductivity of 0.019 W/mK across all thicknesses. One of the thinnest commonly used insulation for partial fill cavity walls Low emissivity foil facings significantly increase the thermal resistance of the cavity