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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

4.5
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Is the foil faced version considered a radiant barrier material with at least a 3/4" air space?


Yes. The foil face side act as a radiant barrier provided it is installed with an open air-space in front of it.

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