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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 density of this EPS?


Density of Expanded Polystyrene (EPS) is 25-200 kg/m³. It varies with conditions during manufacturing processes.

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with an R value of 7.7 (which is probably @ 75 degrees) this would be 1 pound density EPS. 2 pound density EPS should have an R value of around 9.

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