Ceiling & Drywall Water Damage

Water goes down until it hits something, and a ceiling is often that something. A stain on the ceiling is the end of a trip that started somewhere above it: a roof, an attic, a bathroom, a supply line. By the time you see the stain, the water has already been moving for a while.

Reading what the ceiling shows

What you see	What it usually means	How urgent
Light yellow or brown ring	Water has come through, possibly more than once	Soon. Find the source before it spreads
Stain that grows or darkens	The leak is active or the material is still wet	Same-hour attention if it is wet to the touch
Bubbling or peeling paint	Water trapped behind the surface	Soon
Sagging or bulging drywall	Water pooled above the board	Urgent. Keep clear of the area below
Dripping at a light fixture	Water has reached wiring or the fixture box	Urgent. Turn off the circuit if you can reach the breaker dry
Dark spots or fuzzy growth	The material has been wet for a while	See mold removal

What a ceiling stain often tells you. The cause is confirmed by tracing the water.

Why a sagging ceiling is a problem right now

A bulge in the ceiling typically means water is sitting in the board or in the insulation above it. Wet drywall is heavy and weak, and it can fall without warning, taking that water with it. Stay out from under it, move furniture, and call. If you are not sure whether it is safe to go in the room, it is not.

Light fixtures in a wet ceiling are a second concern. Water and wiring do not mix, and a fixture that is dripping should be treated as live.

What happens to drywall when it gets wet

Drywall is gypsum between sheets of paper. Paper is food for mold. Gypsum loses its strength when it is wet and wicks water upward a few inches or more above the visible line. A sheet that was wet briefly with clean water and is still firm can often be dried in place. A sheet that has gone soft, crumbles or has been wet for days is cut out. Water that came through an attic or ceiling often carries dust and insulation fibers, and that raises the odds that the board will need to come down.

Ceiling stain or sagging?

Describe where it is and whether it is dripping. We tell you whether it can wait for the crew.

Call (301) 786-0888

How the work goes

Find the water
We trace it back, generally upward: the room above, the attic, the roof. A plumber or a roofer fixes the source.
Make it safe
Furniture is moved, the floor is protected and a bulging section of ceiling is opened to let water out in a controlled way.
Take out what is soaked
Wet insulation is removed first, since it holds water against the board. Drywall that is soft or has been wet for days is cut out, with the cut extended to dry material.
Dry the cavity
A dehumidifier and air movers go in. For a ceiling, an opening or drying ports let air reach the space above.
Confirm
Moisture readings on framing, subfloor above and remaining drywall are repeated until they are dry.

While you wait

Put a bucket under a drip, and a tarp or plastic sheet over furniture and floor.
Move furniture and rugs out of the room if you can do it safely.
Do not poke holes in a sagging ceiling unless you know the area above it is free of wiring.
Turn off the light fixture and, if it is wet, the circuit.
If the source is plumbing above, shut off the water. If it is the roof, a tarp is a job for a roofer.

Winter leaks from the roof

In cold weather, a ceiling leak often comes from an ice dam, where snow melts on a warm roof and refreezes at the eaves, backing water up under the shingles. There is more on this in the post on ice dams and ceiling leaks in Maryland winters. The ceiling cleanup is the same as any other, but the source needs a roofer and, often, better attic ventilation and insulation.

A small stain on a big wet area

A small stain on a ceiling can sit on top of a much larger wet area. Look for soft spots when you press lightly on the surface, cracks in the paint that follow a seam, and a musty smell in the room or the closet. Check the attic or the space above if you can reach it safely: wet insulation, dark stains on the underside of the roof deck and rust on nails are all signs of a slow leak that has been going on a while.

Ceiling and drywall questions

Can I paint over a water stain?

Not until the area is dry and the source is fixed. Paint over damp drywall peels, and the stain will bleed through unless it is sealed with a stain-blocking primer afterward.

Does the whole ceiling have to come down?

Usually not. We cut out what is wet and soft and stop at dry material. Large areas or ceilings with a lot of insulation above them may need more.

What about the insulation above?

Wet batt insulation is usually removed. It holds water against the drywall and does not dry well in place.

Will it grow mold?

It can if it stays wet. That is why the wet material is taken out and the cavity is dried quickly.

Do you repair and paint the ceiling afterward?

Our work is removal and drying. New drywall, texture and paint are a separate stage, and we can tell you exactly what was opened up so whoever does the repair knows where to start.