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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 considered R-TechI or which model? I, IV, X, VI,VII, etc.???


The product sold in Lowe's is Insulfoams 1lb product. R-Tech I and for unfaced Insulfoam I.

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