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NW Iowa. / SW Arizona | It's like Gene said use the heavier density from Menard's. They have two kinds of 2 " pink insulation & the one is intended for under concrete use. If you have a Lowes in your area wait until Menard's has theirs on sale & then bring their sale add to Lowes & they will match it plus an extra 10% off. They have a blue board but it's the same has Menard's pink. If you have a big area it can add up. | |
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pink insulation under concrete
