The short version
- A sagging ceiling holds water and weight
- It can fall without warning
- Keep people out from under it
- Controlled relief may be possible if it is safe
What is happening
Water that collects above a ceiling adds weight and softens drywall until it droops. Insulation, which holds more water than you might expect, can be heavy.
A ceiling that has sagged is close to failing.
Keep clear
Keep people and pets out of the room, and do not stand under the bulge. Move furniture and valuables if you can do it safely. Do not go into the attic if it appears unsafe.
Do not touch wet electrical fixtures.
Controlled relief
A small hole in the lowest point can let water drain into a bucket, which is safer than a sudden collapse. Do this only if you can do it safely and there is no electrical hazard, or ask a professional.
Wear eye protection.
Find the source
The leak above must be stopped, or the problem will return. A roofer can trace and cover the opening, and other specialists can dry and repair the interior.
If you hear cracking, leave the house.
General information, not engineering, legal, insurance or safety advice. Roofs, policies and local requirements vary, and every situation should be judged on its own facts. If anyone is in danger, call emergency services first.
