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.
I want to add insulation to existing exterior walls. Adding a moisture barrier is not an option because it will be injected or blown in depending on type. Will lack of a moisture barrier be more of a problem with one type of insulation as opposed to another? My preference is to use an organic foam. I live in temperate San Francisco.
2 responses to If I use foam insulation in the exterior walls do I need a vapor barrier?
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.
I want to add insulation to existing exterior walls. Adding a moisture barrier is not an option because it will be injected or blown in depending on type. Will lack of a moisture barrier be more of a problem with one type of insulation as opposed to another? My preference is to use an organic foam. I live in temperate San Francisco.
Thank you
If I use foam insulation in the exterior walls do I need a vapor barrier?
Leave a reply to If I use foam insulation in the exterior walls do I need a vapor barrier?