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R- 7.8 , 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

Perma "R" Products R- 7.8 , 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

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What is the PSI?


If your referring to the compression strength of the R-TECH insulation, is has a value of 10 psi (pounds per square inch) at 10% deformation and about 3.6 psi at 1% deformation.[ASTM C578-Type I]

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