ComfortBoard Commercial Insulated Sheathing is a rigid, high-density, non-combustible stone wool insulation board specifically designed for use as an exterior continuous insulation in commercial rainscreen wall systems. Thermally efficient and vapor permeable, the product provides the rigidity and durability needed for many exterior cladding assemblies, such as lightweight metal and composite panel systems. Its thermal properties improve energy efficiency. Stone wool is also water repellent, providing a tertiary drainage plane for bulk water which may migrate into the wall cavity; yet allows the breathability necessary for outward drying and effective moisture control. This CIS is also highly vapor permeable and sound absorbent, two qualities that are ideally suited to this application. The product is available in 1, 1¼, 2, 2½ and 3 inch thicknesses, with R-values of R4, 5, 8, 10 and 12, respectively.