The Superior Performance of Polyisocyanurate Insulation
Polyisocyanurate (PIR) insulation, often referred to as polyiso, represents a premium class of rigid foam board insulation renowned for its exceptional thermal performance and fire resistance. Formed by a chemical reaction between isocyanurate and polyol, its closed-cell structure yields one of the highest R-values per inch (typically R-6 to R-6.8) among common insulating materials. This allows for thinner profile installations without sacrificing energy efficiency, a critical factor in building design.
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