A water-stained or sagging ceiling means water is trapped above it. The fix is to stop the source, open the ceiling to let the water out, dry the cavity, and replace the wet drywall and insulation. Waiting does not shrink the stain. It spreads it.
The stain on the ceiling is usually the second thing that went wrong. First a pipe leaked, or a roof shingle lifted, or a tub overflowed upstairs, and water spent days or weeks traveling through insulation and framing. When the stain appears, the damage above it is already bigger than the stain.
Water stain on the ceiling and what to check first
Look at where the stain is. Directly under a bathroom or laundry room points to a supply line, drain or tub seal. Under a roof line or near a chimney points to the roof. Along an exterior wall points to a window or siding leak. Under an air handler or a vent points to condensation. If the stain is wet and growing, put a bucket under it and, if it is bulging, poke a small hole at the lowest point to let the water drain. Water trapped behind drywall can bring the whole panel down.
Sagging ceiling from a leak
A sagging ceiling is holding water. Do not stand under it. The drywall is heavy and can come down without warning. Relieve it with a small hole, catching water in a bucket, and keep people clear. Turn off power to any light fixture or fan on that ceiling at the breaker, because water in a fixture is a shock hazard.
Choose this when
- A brown ring, a bubble, a sag or a drip.
- A leak from an upstairs bathroom, kitchen or laundry.
- Damp insulation above the ceiling.
Not the right fit
- Water on the floor too: start with water extraction.
- A roof leak only, with no ceiling damage yet: call a roofer first.
- Dark growth on the ceiling: mold removal.
Wet drywall replacement and what we do first
We open the ceiling along the wet area, usually a section wider than the stain, and remove wet insulation. Then we measure the framing and dry the cavity with air movers and a dehumidifier, using the opening to pull moisture out from above. Once everything reads dry, drywall can be replaced, taped, textured and painted. We handle the water and drying side and give you a written scope. A drywall or paint contractor can use it to price the repair. That scope notes the size of the cut and the materials affected.
Upstairs bathroom leak through the ceiling
These are the most common calls on this page. A failed toilet supply line, a tub overflow, a cracked drain fitting, or a leaking shower pan can all do it. The water often travels along a joist before it appears, so the plumbing may be somewhere other than where the stain is. Shut off the water to that fixture, use the shutoff valve below the sink or toilet if there is one, and call a plumber. We handle the water damage, the plumber handles the pipe. If you do not know where the water is coming from, shut off the main and call us.
| Where the stain is | Likely source | First call |
|---|---|---|
| Under an upstairs bathroom or laundry | Supply line, drain, tub seal, shower pan | Plumber, then us |
| Under a roof slope, near a chimney or skylight | Flashing, shingles, skylight seal | Roofer, then us |
| Along an exterior wall | Window or siding leak | Contractor, then us |
| Near an air handler or vent | Condensate line or duct sweat | HVAC technician, then us |
| Spreading with no clear source | Slow leak in a wall or attic | Shut off main, call us |
Why 1980s to 2000s houses leak from above
Houses built in the 1980s through the 2000s around Kennesaw often have a second floor over a first floor, with bathrooms stacked above living areas. A slow leak in a second-floor bathroom may run for weeks and show up as a ceiling stain over the living room. Hot, humid summers add condensation on cold duct and drain lines in attics, which can also stain ceilings and are often mistaken for roof leaks. After spring storms, check the ceiling by exterior walls and under roof valleys.
Ceiling leak and the first things to sort out
A ceiling stain is a symptom. The order below saves the most drywall.
Upstairs bathroom
Tub, shower or toilet seals and supply lines drip into the ceiling below.
Roof
Missing shingles or flashing let rain in. Roofing is another trade.
AC condensate line
A clogged drain pan overflows into the ceiling or attic.
Supply line or water heater
A slow leak in a hidden line stains the ceiling long before it drips.
What to do before we arrive
- Keep out from under a sagging ceiling. Wet drywall is heavy and can fall.
- Shut off the water to the suspected source.
- Turn off power to any ceiling light or fan that is wet.
- Photograph the stain and mark its edge with a pencil so you can see if it grows.
Ceiling water damage repair cost
| Scope | Planning range, mitigation only |
|---|---|
| 120 sq ft of ceiling and wall, clean supply line, found within the first day (open, dry, remove wet insulation) | $550–$1,250 |
| Larger leak, 600 sq ft across three rooms, found within the first day | $2,850–$5,900 |
| New drywall, texture and paint | Separate, priced after drying |
Planning ranges, not a quote. A written scope after an on-site look is the only real number. Call (678) 940-0778. Use the calculator.
Sources: Angi; Fixr; HomeAdvisor.
Ceiling leak questions
Can I just paint over the stain?
Paint hides the stain but not the moisture. If the drywall or insulation is still wet, the stain returns and mold can start behind it.
Does the whole ceiling have to come down?
Usually not. We cut out the wet part and a margin around it. A big sag or a long-running leak means a larger cut.
Is a sagging ceiling an emergency?
Yes, because it can fall. Keep people out of the room and call right away.
Who fixes the pipe?
A plumber. We start on the water damage as soon as the water is off.
Related services
Water on the floor right now? Call us. (678) 940-0778