ISOGARD™ HD Cover Board has a closed-cell polyiso core that utilizes ISOGARD™ Foam Technology. The board provides high UL Fire-resistance ratings, some of the highest thermal performance of any half-inch insulation cover board on the market, and is resistant to extreme weather conditions. With an R-value of 2.5, it can provide high energy savings and achieve points in the LEED rating system. Lightweight and easy to cut and install, this high-density cover board offers savings from reduced transportation costs, labor and material during application. For more information, visit