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Do I need a vapour barrier when insulating my garage?
ARTICLE HIGHLIGHTS:
Prevent condensation from occurring within wall cavities with a vapour barrier, says Steve Maxwell, casaGURU's home improvement guru, in response to a homeowner's query.
Q: Do I need a vapour barrier when insulating my garage? I'd like to have loose-fill insulation blown into hollow wall cavities, but I'm concerned since there'll be no vapour barrier underneath the drywall.
A: Polyethylene plastic is usually used as a vapour barrier under drywall to prevent interior moisture from diffusing through wall surfaces and condensing inside cold wall cavities during winter. That said, there are other ways to make this happen. Properly taped and painted drywall acts as a reasonable vapour barrier, too. Natural Resources Canada is just one technical authority that makes this claim. Will you be heating your garage to household standards, or just heating it occasionally? Will there be showering, cooking or other moisture-producing activities going on? If your place won't be heated a lot, and there won't be lots of moisture generated, then you can be even more sure that a properly sealed drywall surface will prevent condensation from occurring within wall cavities.
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article do it yourself (diy) drywall drywall and plastering garages green building home improvement insulation steve maxwellRating
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