Water leaking through the ceiling? What to do right now
If the wet spot is anywhere near a light fixture, cut the breaker before you touch anything else. Then find whatever’s actually feeding the leak and shut it off, either the main or the fixture directly above the stain. Once the water and the power are handled, you’ve got time to work out where it came from.
Cut the power first
Don’t touch a light fixture or a ceiling fan that’s wet or dripping. The fixture box can be full of water you can’t see. Go to the breaker panel and kill the circuit for that room if it’s labeled. If you’re not sure which one it is, shut off the main breaker for the house. It’s safer to lose power to everything for ten minutes than to guess wrong.
Shut off the water feeding it
If you can tell what’s directly above the wet spot, and it’s clearly a bathroom, start there. A running toilet or a tub that just got used points to that room’s own supply line or drain. Some toilets and sinks have a small shutoff valve right at the fixture. Close it if you can find it.
If you don’t know what’s above, or the leak is steady and not tied to anyone using anything, go straight for the main. Here’s how to find it and shut it off if you’ve never had to before. Shutting off the whole house for a few minutes costs you nothing.
If the ceiling is bulging, don’t just watch it
A sagging, bulging patch of drywall is holding water above it, and sooner or later it lets go. Keep everyone out from under that spot, including pets. Move anything valuable out of the way.
- Set a bucket or a big bowl under the lowest point of the bulge.
- Stand off to the side, not directly underneath.
- Poke a small hole at the lowest point with a screwdriver or the corner of a putty knife.
- Let it drain into the bucket. It’s far less mess than the whole patch coming down.
Never touch a wet light fixture. Cut the breaker instead. If you can’t reach the panel without walking through standing water, stay out of that room and call an electrician or the power company.
Take photos before you clean up
Once the water’s off, grab your phone before you grab a mop. Get the stain, the bulge, the puddle on the floor, and anything that got ruined. Note roughly when you first noticed it. Your insurance company will ask, and it’s easier to answer now than from memory later.
What’s above that spot?
- A bathroom above. A supply line pinhole, a toilet’s wax ring seal, a tub or shower drain fitting, or a cracked shower pan liner can all send water into the floor and out through the ceiling below.
- A kitchen or laundry room above. The fridge’s icemaker line, a dishwasher supply hose, or a washing machine hose are common sources. The fridge line is easy to overlook.
- An attic above. A clogged AC condensate line, an overflowing drain pan under the air handler, a water heater installed up there, or a roof leak dripping onto insulation can all end up as a stain on the ceiling below.
Read the pattern before you call anyone
The timing usually tells you more than the stain does.
- Only shows up when it rains: that’s the roof.
- Only shows up after someone showers: that’s a drain line or the shower pan itself.
- Steady, whether or not anyone’s using anything: that’s a supply line, since those stay pressurized around the clock.
In North Alabama summers, a clogged AC condensate line or an overflowing drain pan is a common cause of ceiling stains, especially in attics that run the air handler hard all day. Rule it out before you assume it’s plumbing.
If you’ve narrowed it down but can’t find the source, stop cutting holes. Our leak detection page explains how we’d find it.