ThermalStar® Below Grade Insulation
With up to 20% of a building's total heat loss occurring at the perimeter and slab of the foundation, below grade insulation is a vital component of a building’s envelope to achieve energy efficiency. ThermalStar Insulation Board is an architectural grade rigid insulation with a variety of R-values and high compressive strengths to support all your high load applications.
With more than 50 years of experience, all of our products are manufactured under an industry-leading quality control program monitored by UL and ICC-ES. ThermalStar Insulation Board provides unmatched quality, with a stable long term R-value that will last the lifetime of your structure.
Multiple standard thicknesses, ranging from 1/2" to 4"
High load bearing, with compressive strengths as strong as 60 psi
Stable, long term R-value
Minimal long-term moisture retention with the ability to dry quickly
Integrated termite resistance for additional protection
Limited lifetime warranty for physical and thermal performance, and termite resistance when applicable
Related Case Studies
The new Fort Carson hangar radiant heat system gets a boost from EPS rigid insulation used below grade.
1,986,000 board feet of EPS rigid insulation was specified to improve energy savings for Badger State Fruit Processing cold storage facility in Wisconsin.
80,000 square feet of below grade rigid insulation was installed at the new University of Iowa's Recreation Center.