How to insulate existing attic wall adjacent to heated space?
Existing attic exterior framed walls are uninsulated. 2 attic framed walls adjacent to upstairs heated bedrooms are insulated with batt insulation (vapor barrier at warm side). Batts are between the studs and exposed on unheated side.
Question: Can I add foam insulation board to the unheated (attic) side of these walls to increase R value. What type would I use to avoid creating moisture issues? Perhaps add foam insulation board over 1x or 2x furring on studs to create air space? Thanks for the help.
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