Vapor Barrier with Rockwool and Zip Sheathing
We are replacing the siding and plywood on the exterior of our home (rotting due to moisture intrusion in some areas), and want to replace all of the remaining fiberglass insulation on the exterior walls with Rockwool mineral wool batts surrounded by exterior Zip insulated sheathing. (R6 Zip and R15 mineral wool)
Do we need an interior vapor barrier if using this in zone 5 (Syracuse, NY)?
I am hoping we don’t have to tear down all of the exterior wall drywall to re-insulate the home if an interior vapor barrier is needed …. (Spray foam is not an option due to chemical sensitivities in the home) – and would appreciate any thoughts.
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