Water comes out of a ceiling light because the fixture is the easiest way down. When a leak above fills the space over your ceiling, the water runs along joists and wiring until it finds an opening, and the hole cut for the light box is usually the first one it reaches. The light itself is rarely the problem. Something above it is leaking, most often a bathroom, kitchen or laundry line, and the water near the wiring makes it a safety issue before it's anything else.
Here's why it happens, what to do now and who to call.
Why Does Water Come Through the Light Fixture?
Drywall and plaster hold water for a while. The light box doesn't. It's a hole in the ceiling with a gap around the box and a wire running up into the cavity, so water collecting above the ceiling drains toward it. That's why a fixture can drip steadily while the ceiling around it barely looks stained.
It also means the leak may not be directly above the light. Water can travel several feet along a joist or pipe before it drops, so the fixture tells you where the water came out, not where it started.
Where Is the Water Coming From?
Look at what's above the light.
A bathroom: a toilet supply line or wax ring, a tub or shower drain, a shower valve, or failed caulk and grout.
A kitchen or laundry room: a dishwasher, refrigerator or washing machine supply line, or a sink drain.
An attic furnace or air handler: a clogged condensate line or an overflowing drain pan, usually when the AC is running.
The roof: only if the drip shows up during or right after rain on a top-floor ceiling. Flashing, a vent boot or a skylight are common spots.
A simple test helps. If the drip stops when nobody is using the bathroom upstairs, a drain or fixture is likely. If it keeps going with every faucet off, a pressurized supply line is more likely, and the water should stay off until a plumber finds it.
What Should I Do Right Now?
Don't touch the light, the switch or the fixture. Don't remove the globe or reach into the box. Water and household wiring together can cause a shock or a fire.
Keep people and pets out of the room.
Call an electrician or your electric utility and tell them water is coming through a light. Let them decide how to make the circuit safe. Don't go to the breaker panel yourself if there's water nearby or you're unsure.
Stop the water at the fixture valve upstairs, such as the toilet or sink shutoff, or at the main shutoff if the source is plumbing and you can reach the valve without going near the wet area.
Put a bucket under the drip if you can do it without touching anything electrical and move furniture out of the way.
Watch for sagging. A bulge around the fixture means water is pooling on the drywall. Stay out from under it.
Take photos of the fixture, the ceiling, the source upstairs and anything that got wet.
Water coming through a ceiling light? Call Blue Valley at (913) 395-8488. Open 7 AM–9 PM, every day.
Who Should I Call?
Usually more than one:
An electrician or your electric utility to make the circuit safe and check the fixture and wiring once things are dry.
A plumber to find and fix the leak if it's coming from a bathroom, kitchen or laundry line. A roofer if it only leaks in the rain.
A water damage restoration company to dry the ceiling, insulation and whatever is below it.
Our post on who to call for a water leak in your ceiling goes through each one in more detail, and our ceiling leak page covers what we do when we get there.
Drying the Ceiling Cavity
Once the leak is stopped and the electrical side is safe, the water that's already above the ceiling still has to come out. Insulation holds it against the drywall, and wet framing dries slowly in a closed space.
We check the ceiling, the walls below and the floor with moisture meters to see where the water actually went. Where it's trapped, we may cut a few small holes to check the cavity and get air into it, like the access holes in the photo above from a bathroom leak in a nearby home. If the drywall has sagged or the insulation is soaked, that section usually needs to come out. Our ceiling water damage page walks through how we decide what can be dried in place.
If water may have run down into a wall, see how to tell if there's water damage in your walls.
Fairway Homes
Most Fairway homes were built in the 1940s and 1950s and have been updated in stages since. Bathrooms added or remodeled upstairs often sit right over a living room or bedroom with a ceiling light, and older plaster and drywall ceilings below them can hold more water than they show. We dry ceilings and the rooms below for homeowners in Fairway, Mission, Prairie Village, Roeland Park and nearby cities.
Frequently Asked Questions
Is water leaking from a ceiling light dangerous?
It can be. Water near wiring can cause a shock or a fire, and a ceiling holding water can sag and fall. Stay away from the fixture and switch, keep people out of the room and have an electrician or your electric utility make it safe.
Can I use the light again once it stops dripping?
Not until an electrician has checked the fixture, box and wiring. A light that seems fine can still have hidden damage.
Can I just paint over the stain around the light?
Not until the leak is fixed and the drywall, insulation and framing read dry. Painting first can hide a leak that's still going. See our post on a water stain on the ceiling below a bathroom.
Will homeowners insurance cover it?
It depends on your policy and what caused the leak. It's reasonable to call your agent, and we document what we find with photos and moisture readings.
Call our restoration team
If water is coming through a light or anywhere else in your ceiling, call Blue Valley at (913) 395-8488. Open 7 AM–9 PM, every day. We're IICRC Certified & Fully Insured. We'll find where the water went, explain what can be dried and what can't, and give you a free evaluation. See our water damage restoration in Fairway page for more.