Do I need to remove drywall and vapor barrier when I increase the insulation from 4″ to 10″?
I’m expanding a bedroom over my garage to become an in-law apartment. I’ll be adding a full dormer on the back. Do I need to remove the drywall and vapor barrier of the existing side wall where the new dormer wall joins to it? The new walls will be 10″ double stud. The existing walls are 4″ tradition framing. I assume they are insulated with paper-faced fiberglass. The knee wall on the front will also be expanded for more insulation. Do I need to remove that drywall too?