I am looking into closing a three sided patio (one side is the garage the other two are the house) and making it into a bath. The question is if three wall are existing interior walls and the NEW wall is exterior, will I and/or should I put a VB on ALL wall to seal / enclose the new bath from the rest of the house. ALSO...if i do should the NEW exterior wall , on the out side, have a VB to protect it from the rain and such...
THANKS
THANKS