Kingspan Kooltherm K7 is a premium performance pitched roof board for the rafter / joist level insulation, this is comprised of rigid thermoset phenolic insulation core and faced on both sides with a low emissivity composite foil facing. Kooltherm K7 has a thermal conductivity of 0.022 W/mK for insulant thckness 25 - 44 mm, and 0.021 W/mK for insulant thickness 45 - 150 mm.
Available in a range of thickness options from 30 – 100 millimetres.