Stop
A sagging, wet ceiling can collapse without warning; keep people and pets out of the room and call a professional before it's disturbed.
Symptoms
- Ceiling drywall visibly dips or bulges downward
- Area feels soft or spongy when gently pressed
- May be paired with water stains or a musty smell
Likely causes
- CommonSaturated drywall from a leakDrywall loses strength when it absorbs water, causing it to sag under its own weight.
- CommonLong-term undetected roof or plumbing leakSlow leaks over time can weaken drywall well before a stain becomes obvious.
- Less commonInsulation or debris weight aboveWet insulation sitting on top of drywall can add enough weight to cause sagging.
What to do
- Stay out from directly underneath a sagging or bulging ceiling.
- Place a bucket to catch any active dripping if present.
- Shut off water to the area above if a plumbing leak is suspected.
- Have the source of moisture identified and repaired.
- Cut away and remove the damaged, weakened drywall.
- Let the framing and insulation dry fully before replacing drywall.
- Install new drywall, tape, mud, and repaint once everything is dry.
Tools and parts
- Drywall saw
- Bucket
- Moisture meter (optional)
Replacement drywallSearch: “drywall sheet ceiling repair”
When to call a pro
Call a roofer or plumber immediately to stop the leak, and a contractor to assess and repair the ceiling structure.
Safety
Stop
A sagging, wet ceiling can collapse without warning; keep people and pets out of the room and call a professional before it's disturbed.