If I use foam insulation in the exterior walls do I need a vapor barrier?

Posted on January 22, 2010 by admin

Should I still us a poly sheeting over the inside wall?
(Using foam sheets, not expanding/sprayed foam)
insulation with a poly sheeting or kraft faced fiberglass? Which would you recommend?

Yes you should because of possible condensation. Wherever warmth from inside meets cold air from the outside you should use the vapor barrier. Especially in your basement.

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One Response to If I use foam insulation in the exterior walls do I need a vapor barrier?

  1. Michelle S says:
    January 22, 2010 at 5:22 pm

    Yes you should because of possible condensation. Wherever warmth from inside meets cold air from the outside you should use the vapor barrier. Especially in your basement.
    References :
    My husband is a contractor.