An innovative new product offering from GAF, EnergyGuard™ NH Polyiso offers excellent thermal value and is free of potentially hazardous flame retardant chemicals, making it better for the environment. This new line maintains the same R-Value at both a mean temperature of 40 and 75 degrees Fahrenheit when tested according to ASTM C1289 standard using theC518 test method. The product offering also contributes towards and holds sustainability certifications, including LEED, DECLARE, Living Building Challenge, GreenGuard, GreenCircle, HPD, and EPD. 

EnergyGuard NH Polyiso is an energy-efficient solution designed to help you meet your sustainability goals. It is currently offered in a full range of products with a variety of facers and sizes, including both flat and tapered, as well as cover boards.* Learn more at

*Low-temp R-Value does not pertain to EnergyGuard NH Cover Boards.