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Johns Manville R-13, 2-in x 4-ft x 8-ft AP Foil Faced Polyisocyanurate Board Insulation in the Board Insulation department at Lowes.com
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Owens Corning FOAMULAR 250 4 in. x 4 ft. x 8 ft. R-20 SE Rigid Foam Board Insulation 3J - The Home Depot
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Owens Corning FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Scored Square Edge Rigid Foam Board Insulation Sheathing 20WE - The Home Depot
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Alands Plastic 4FT X 8FT PVC Foam Board 3mm 5mm 10mm for Advertising - China PVC Foam Sheet, PVC Foam | Made-in-China.com
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Kingspan Insulation R-3.75, 0.75-in x 4-ft x 8-ft Unfaced Foam Board Insulation in the Board Insulation department at Lowes.com
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