The ceiling is down in the office. It took about four hours of steady work. The room that needs a new ceiling is part of the Old garage area, so it wasn't built with a ceiling being put in just that room at the same time as the walls. I had to carefully cut the sheets right along where they meet the wall so as not to radiate a break through to the next room where the sheet extends. That was a wall against the sunroom, a wall against the hall, and two sides of the closet in the corner of the office.
I'll finish the hall ceiling tomorrow.