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Old 02-06-2016, 09:37 PM   #1
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Roxul vapor barrier


Does this insulation need a vapor barrier? Exterior wall 2x4 wall. Read conflicting reports. Some say yes others say no. Which is it? Thanks.
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Old 02-06-2016, 10:52 PM   #2
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Roxul is not a vapor barrier in this case. Depending on applications end where you live, you may need to add one.
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