Undersized joists in the attic floor had bowed and then the keys in the plaster ceiling pulled away from the joists.
Sagging joice attic ceiling.
Ceiling drywall that sags between joists or trusses is sometimes called pillowed drywall.
Then use idea 2 below to really beef it up.
If a ceiling is bowed sagging or dropped down then the reason may relate to a structural issues.
You either have to replace 1 2 in.
Or add furring strips and a second layer of 5 8 in.
They often occur because of warps from weather and temperature.
Cracks on a sagging or bowed ceiling.
Unsightly ceiling joist sags are a common occurrence in old ceilings.
At the time of construction nails rather than screws regularly were used to attach wood lath to joists and the nails had slipped right out.
If the ceiling joists or trusses supporting the ceiling drywall is spaced too far apart then sagging may result and the stress from this may create.
Sagging ceiling drywall always indicates a problem that needs correction and it adds a touch of shoddiness that no room needs.
A general contractor sistered new joists to the existing ones.
Spacing of ceiling joist or trusses.
If your ceiling drywall is.
Sometimes they come about when different materials are used between the frame and the joists.
1 if the joists are exposed at the moment and easily removed and reasonably square you might be able to flip them over.
You can correct a sagging ceiling by overlaying a two piece strongback on the joists.
If it is sagging because it got.