Kooltherm K18 is insulation, dry–lining and vapour control in one easy-to-fix board. It can be installed to battens mounted on either stonework or brickwork walls, with or without an existing lining. It is also suitable for lining the underside of rafters in attic conversions. It is an ideal internal wall insulation solution for both new build and retrofit projects and offers thermal conductivities as low as 0.021 W/mK for the insulation component