With its superior energy efficiency, greater cost effectiveness and proven fire safety, Firestone polyiso insulation is the insulation trusted most by roofing professionals.
Firestone polyiso rigid foam board insulation is the ideal choice for any project and is used in approximately 60% of all new commercial construction applications.
All Firestone polyiso insulations use EPA approved blowing agents.
LTTR Updates .
Due to advances in testing methodology which more accurately predict thermal performance over time, LTTR values are changing. This change in R-value will be applied to Firestone commercial roofing insulation products produced at its seven manufacturing locations. Learn more.