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STYROFOAM R-10, 2-in x 4-ft x 8-ft Unsheathed Unfaced Polystyrene Board Insulation in the Board Insulation department at Lowes.com
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Dow R- 5, 1.5-in x 8-ft x 4-ft Faced Polystyrene Board Insulation in the Board Insulation department at Lowes.com
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Pactiv R-5, 1-in x 2-ft x 8-ft Unfaced Polystyrene Board Insulation in the Board Insulation department at Lowes.com
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