1/2″ splash of closed cell air and vapor barrier?

Local builder I know in Memphis (zone 3) uses 1/2″ splash of closed cell insulation for air sealing plus fiberglass batts in a 2×4 wall. All the guidance I have… Local builder I know in Memphis (zone 3) uses 1/2″ splash of closed cell insulation for air sealing plus fiberglass batts in a 2×4 wall. All the guidance I have…Read MoreGreenBuildingAdvisor