New Rigid Insulation With Graphite Promises High R-value With Thinner Material
A relatively new Graphite Polystyrene (GPS) rigid insulation is now available from a number of manufacturers. The graphite allows the insulation to be thinner while exhibiting comparable R-value to thicker expanded polystyrene (EPS) boards, and it enhances the material’s R-value as temperatures decrease so it retains more of its R-value in colder temperatures.
Depending on the insulation thickness and density, GPS has a permeability rating ranging from 2.5 to 5.5, which allows for movement of water vapor out of the wall assembly. It also dries quickly and has minimal long-term moisture retention. These two attributes make GPS insulation well-suited for high-moisture environments.
Thanks to Walls and Ceilings Magazine. Click below to read the full article.