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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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Would this be a good option to plug foundation vents?


This product will slow down the air flow of a vent but will still allow air through. Insulfoam EPS is a closed cell rigid insulation but is not an air barrier.

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