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Owens Corning FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Square Edge Rigid Foam Board Insulation Sheathing 36L - The Home Depot
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Dupont 1/2-in 4 x 8 Tuff-R Foil Faced Se Polyisocyanurate Insulation Sheathing (R-3.3) 43/Pcs - Insulation - Arlington Coal & Lumber MA
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