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. K7provides a thermal conductivity between 0.020 W/mK and 0.023 W/mK.
Available in a range of thickness options from 30 – 100 millimetres.