Vapor barrier/retarder for Rockwool R23 insulation
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My exterior walls are Zip system R-6 Panel with 2×6 wall. I am planning to use Rockwool R-23 insulation for 2×6 wall. I am located in Zone-4. Do I need to use vapor barrier or retarder?
Please advice
thanks
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Replies
According to Dan Edelman of Rockwool he says No. He's @danedelmanrw on IG or [email protected] . He's a great resource for all things rockwool.
A class 3 vapor retarder is sufficient (drywall with latex paint)