Who to Call for a Water Leak in the Ceiling

A water stain on the ceiling is stressful because you cannot see what is causing it. The answer to "who do I call?" depends on where the water is coming from. This guide helps you narrow it down in a few minutes so you call the right trade first. If the source turns out to be plumbing, our team provides leak detection in McLean and fixes the pipe or fixture on the same visit when we can.

This is general information, not insurance or legal advice.

Who to call for a water leak in the ceiling: first steps

Turn off power to any light fixture or fan in the wet ceiling at the breaker.
Catch the water. Put down a bucket, towels and plastic. Move furniture and electronics.
Stop the water if you can. If the leak is under a bathroom, shut off the toilet and sink valves. If you cannot tell, close the main water shutoff.
Relieve a bulge carefully. If water is pooling in a sagging spot, poke a small hole over a bucket to drain it. Stay out from under large, sagging sections.
Take photos. They help with insurance and with diagnosing the source.

How do I tell where the water is coming from?

Clue	Likely source	Who to call
Under a bathroom; worse after showers or flushes	Toilet seal, shower pan, drain or valve	Plumber
Under a kitchen or laundry	Dishwasher, sink drain, washer hose	Plumber
Meter moves with all water off	Supply pipe leak	Plumber
Only during or after rain, top floor	Roof, flashing, gutters	Roofer
Near exterior wall during wind-driven rain	Siding, windows, flashing	Exterior contractor
Under an air handler; summer only	Clogged condensate line or pan	HVAC technician
In a condo, appears with no rain	Unit above	Building management and a plumber
After a cold snap	Frozen and burst pipe	Plumber

How does a plumber find a ceiling leak?

We start by checking whether water is leaking from supply pipes, which are under pressure all the time, or from drains, which only leak when a fixture is used. A meter test with everything off tells us if a supply line is leaking. Then we run fixtures one at a time above the stain. A thermal camera shows wet areas in the ceiling, and a moisture meter maps how far water spread. This narrows the source before any drywall is cut.

What are the most common plumbing causes?

Toilet wax ring failure. Water leaks at the base when the toilet is flushed.
Shower pan or drain leaks. Water gets under the tile during showers.
Tub overflow gaskets. Leaks when the tub is filled high.
Supply line leaks. Constant leaks from a fitting or pinhole in the ceiling space.
Washing machine hoses. Upstairs laundry rooms can leak a lot of water fast.
Frozen pipes. Pipes in exterior walls or attics can split in a cold snap.

The EPA notes that a showerhead leaking at 10 drips per minute wastes more than 500 gallons a year. Slow leaks add up in both water and damage.

What if I live in a condo?

Tell building management and the owner of the unit above right away. Shut off water to your own unit if the leak could be yours. A plumber can test your fixtures to show whether the leak is coming from your unit or another one. Keep photos and written findings for your association and insurer.

What will it cost to fix?

The cost depends on the source, how easy it is to reach and how much drywall must be opened and repaired. Fixing a toilet seal is a small job. A shower pan replacement or a supply leak above a finished ceiling takes more time. Our guide to leak detection cost explains the factors. Some repairs need a Fairfax County plumbing permit.

What about insurance?

Virginia's Bureau of Insurance consumer guide tells homeowners to give immediate notice of a possible claim, protect the property from further damage and keep records of emergency repairs. Coverage often depends on whether the leak was sudden or happened slowly over time, so check your policy and talk with your agent.

How do I prevent ceiling leaks?

Replace washer hoses with braided lines every few years.
Watch for loose toilets and cracked grout in upstairs bathrooms.
Insulate pipes in exterior walls and attics before winter.
Install a leak sensor under the washer and water heater.
Check the meter monthly with all water off.

Local note: Ceiling leaks in Tysons condos often come from the unit above. Older homes in North Arlington and Falls Church often have original shower pans and supply pipe in ceilings. Townhomes in Reston often have upstairs laundry.

Related reading: Learn how to prevent frozen pipes, see what to do if your water heater is leaking, and try the water meter leak test.

When should you call a plumber?

Call a plumber when the ceiling leak is under a bathroom, kitchen or laundry, when it happens with no rain, when the meter moves with water off, or after a freeze. Call right away if water is pouring or the ceiling is sagging.

Water coming through a ceiling in McLean? Call (571) 760-4451 for 24/7 leak detection and repair from McLean Plumber Works.

Frequently asked questions

Should I poke a hole in a ceiling that is bulging with water?

If water is pooling in a bulge, putting a bucket under it and making a small hole can drain it in a controlled way and stop a bigger collapse. Turn off power to any light fixture in that area first and stay out from under a large, sagging section.

How can I tell if a ceiling leak is from plumbing or the roof?

If the stain is under a bathroom or kitchen and appears when fixtures are used, or the meter moves with water off, it is likely plumbing. If it appears only during rain and is on the top floor, suspect the roof.

Will a small ceiling stain go away on its own?

The stain may dry, but the cause will not fix itself. Repeated wetting leads to mold, sagging drywall and rot in framing.

Does homeowners insurance cover ceiling leaks?

Sudden, accidental leaks are treated differently from long-term seepage in many policies. Virginia's Bureau of Insurance says to give immediate notice of a possible claim and protect the property from more damage.

Can an AC unit cause a ceiling leak?

Yes. A clogged condensate drain or overflowing drain pan from an attic or upstairs air handler often leaks through ceilings in summer. That is a job for an HVAC technician.