I have a brick house built in the 1920s. I'm installing a bathroom basement based on an existing layout, but I'm trying to keep the "wet" side (mechanical room with hot water heater, etc.) physically separate from the "dry" side (scrapbook room, home office). The new bathroom will have a shower, whereas the old bathroom did not.
I'm installing a 2x4 stud wall between the bathroom and home office. The home office side will have mold resistant 1/2" drywall on the walls. The bathroom side will have concrete board covered with a water barrier (Kerdi, more than likely) and tile in the shower and FRP in the non-shower bathroom area. Of course, I'm also installing a fan and venting to remove moisture from the air after a shower.
My question, and I'm planning on installing bat insulation in the wall, is:
Should I put a vapor barrier on the home office side, or will this eventually trap moisture/condensation in the wall?