need advice concerning vapor barrier
I'm going to be doing some renovation to a frame and stucco house with a sprayed foam roof. The reno will include removing the drywall from two rooms, installing rigid foam (polystyrene) insulation, sealing the edges and voids with spray foam and re-drywalling the rooms.
The question is: Where does the vapor barrier go? I've heard that it is to be installed on the warm side of the wall while my neighbor, who's a contractor, says on the cold side.
Who's right? And why? Could either of us be confusing the Tyvek house wrap with a vapor barrier?