A brown ring or a damp spot on the ceiling, right under a bathroom. It might be the toilet, the shower, or a pipe. Here is how to narrow it down and what to do today.
Short answer: A stain under a bathroom usually means water is getting past the toilet seal, the shower pan, a drain joint or a supply line above. A roof leak is possible too, but check the bathroom first.
Do this now: stop using that bathroom, put a bucket under any drip, and keep people out from under a bulging ceiling.
Can wait a day: a dry, old, faded stain that has not grown.
Act today: a stain that is growing, damp to the touch, or dripping, or a ceiling that sags.
Call or text Ryan: if you cannot tell where the water comes from.
What to Do in the First Hour
Stop using the bathroom above. No showers, no flushing, no sink, until you know the source.
Put a bucket under any drip. Move furniture and rugs.
Touch the stain. Damp or cold means active. Dry and stiff means old.
If the ceiling bulges or sags, it is holding water. Poke a small hole to release it into a bucket, standing off to the side. A bulging ceiling can fall.
If you hear water running inside the wall or the stain is spreading fast, close the main water valve. Here is where to find it.
Water near light fixtures or outlets is an electrical risk. If water drips from a light, turn off the breaker for that room.
Likely Causes, From Most to Least Common
The toilet seal (wax ring). A toilet that rocks, or has water around the base, can leak every time it flushes. The water goes into the floor and shows up below. See toilet leaking at the base.
The shower pan or tub drain. A cracked pan, a loose drain, or worn caulk and grout lets water through each time someone showers. The stain shows up a day or two after use.
A supply line or shut-off valve. Under the sink or at the toilet. These drip constantly, with or without use.
A drain line joint. A joint between the bathroom drain and the main drain can weep. It often leaks only when a lot of water goes down at once.
A shower valve or tub spout. Water leaks behind the wall when the shower runs.
The roof. If the bathroom is on the top floor and the stain shows only after rain, it can be a roof leak, a vent pipe boot or a window.
Want a second pair of eyes?
Text Ryan a photo of the stain and the bathroom above it. He is a licensed Master Plumber and answers his own phone, day or night.
Shows up after rain only: likely the roof, a vent pipe boot or a window.
Shows up after someone showers or flushes: the bathroom.
Grows when nothing is used: a supply line under pressure. Close the main valve. If the stain stops growing, it is a supply line.
To test the shower, run it alone for a few minutes and check the ceiling. Then flush the toilet a couple of times and look again. One test at a time, with a few minutes between. Do not run the whole bathroom at once or you will not learn anything.
Many homes in the North Georgia mountains have a bathroom over a crawlspace or a basement. That means the first sign of a leak might be a musty smell or a soft spot in the floor, not a ceiling stain. If your bathroom is above an unfinished space, take a flashlight and look at the underside of the floor under the toilet and shower. Wet wood, dark stains or dripping insulation point right at the source.
If your home is on septic, a leaking drain joint sends wastewater into the structure, and the smell tells you right away. Do not wait on that one. See sewage smell in the house.
Why a Stain Should Not Wait
Drywall soaks up water and holds it. Mold can start fast in a warm, damp ceiling. Wood joists and subfloor weaken the longer they stay wet, and insulation stays wet for a long time.
Do not paint over the stain before the leak is fixed, because the leak will return and the stain with it. Ryan fixes the plumbing side of the problem. Drywall and paint repair are a job for a drywall or painting contractor after the leak is stopped.
★★★★★
"Ryan was knowledgeable, courteous, and took the time to explain the issue and the best solution. What impressed me the most was their honesty and fair pricing, no hidden fees or unnecessary upsells. It's clear that The Village Plumber truly cares about their customers."
Cassie E., May 2025, Google review
What Ryan Does
Ryan Chastain is a licensed Master Plumber, Georgia license MPR108473. He finds the source of the water, explains it in plain words, and gives you a free estimate before any work starts. No trip fee, no diagnostic fee. Leak repair work is backed by a warranty, with the terms in writing at the estimate.
If water is coming through right now, call. If it is slow and steady, a text with photos works well. He answers his own phone, and a text gets through in the mountains when a call may not.
Common Questions
Can a ceiling stain mean the toilet is leaking?
Yes. A failed wax ring or a loose toilet lets water out with every flush. It runs through the floor and appears on the ceiling below. Watch for a toilet that rocks or a damp floor around the base.
How long can I wait before calling about a ceiling stain?
If the stain is dry and old and has not grown, you can wait a day or two. If it is wet, growing or dripping, call or text the same day. Water in a ceiling does more damage the longer it stays.
Should I cut a hole in a ceiling that is sagging?
If it bulges with water, a small hole lets it drain into a bucket and may save the ceiling. Stand to the side. If it looks like it may fall, keep people out of the room and call.
Is it a roof leak or a plumbing leak?
A roof leak shows after rain. A plumbing leak shows after using the bathroom, or grows while it is dry outside. Closing the main valve is a quick test for a supply leak.
Will my well or septic system be affected?
A leak inside the house does not harm the well or the septic system. A drain leak, though, may smell, and a long supply leak makes a well pump run more.
Does Ryan repair the drywall?
No. Ryan stops the leak and repairs the plumbing. Drywall and paint repair come after, from a drywall or painting contractor.