I am buying a house with an attached garage. there is nothing covering the sidewall studs. It is open to the rafters as well. Plan is to insulate and drywall the walls and flat ceiling. There is an existing drywalled wall between the main house and attached garage.
Ten years ago they said every wall every time vapor barrier. Now some people say if unheated and no freezing no vapor barrier lets it dry out when needed. Pretty much everything I have read assumes snow and ice with humid summers. I have never seen condensation on wood or drywall inside.
I have read different opinions if any of this should have a vapor barrier or not. It will never be heated or air conditioned. Cars will park inside as well as shop tools. Climate never gets below freezing, summers are hot and dry. No water in the garage no sinks, no laundry.
Bil lD