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.

Features

• Multiple standard thicknesses, ranging from 1/2" to 4"
• Stable, long term R-value
• Integrated termite resistance for additional protection
• High load bearing, with compressive strengths as strong as 60 psi
• Minimal long-term moisture retention with the ability to dry quickly