While doing a plumbing repair, I found that the plaster ceiling is coming off the joists and about to fall. It's 1/4" plaster over 1/2" wallboard, and the area that it's "hanging by a thread" is aout 8' x 8'. The gap between the joists and the wallboard base is about an 1" at worst (a lot). These are 9' ceilings and the sag was almost not noticed from the floor level.
What would you advise as a repair? I'm thinking about pre-drilling and countersink, so that some long screws could keep it in place (with the sag), but from falling. Or, as an alternative, pushing it back up against the joists (while existing drywall nails are still in place), and then refastening. Thoughts either way? (Paint crew is on hold for this house.)
What would you advise as a repair? I'm thinking about pre-drilling and countersink, so that some long screws could keep it in place (with the sag), but from falling. Or, as an alternative, pushing it back up against the joists (while existing drywall nails are still in place), and then refastening. Thoughts either way? (Paint crew is on hold for this house.)