Thermax Polyisocyanurate Foam Board


Credit: Dow Chemical Co., Building Solutions

What makes this product green?

  • Reduces heating and cooling loads


Thermax is a brand of non-structural, rigid board insulation products consisting of a glass-fiber reinforced polyisocyanurate foam faced with aluminum foil. Depending on the product, the faces differ in thickness and are either embossed aluminum or embossed white acrylic-coated aluminum. Thermax has an R-ValueMeasure of resistance to heat flow; the higher the R-value, the lower the heat loss. The inverse of U-factor. of 6.5 per inch and is designed for use in wall and roof assemblies, crawlspaces, and interior basement applications. Thermax products are made with non-ozone-depleting hydrocarbon blowing agents. However, these blowing agents still contribute to global warming.

Manufacturer Information

Dow Chemical Co.
Building Solutions
200 Larkin Ctr.
Midland, MI 48674
Phone: 800-232-2436
Fax: 989-832-1465
Toll-free: 866-583-2583

Listed in: Board Insulation