Vapor/air barrier question. – Climate Zone 5

I’m working on a project in Climate Zone 5. This is a sprinkler system addition to a 5B dormitory building. The existing condition is that there is a gypsum board… I’m working on a project in Climate Zone 5. This is a sprinkler system addition to a 5B dormitory building. The existing condition is that there is a gypsum board…Read MoreGreenBuildingAdvisor