EnergyShield CGF Pro (formerly Rboard Pro) is composed of a Class A fire-rated closed cell polyisocyanurate (polyiso) foam core faced with a high-performance coated glass facer on the front and back. The product combines high R-value, Class A durable glass facers, and water-resistive barrier attributes in a high-performance rigid insulation board. Panel sizes are 4 x 8 ft. or 4 x 9 ft. and can be supplied in nominal 16- or 24-in. widths for use in cavity wall applications. Custom sizes are also available.