Polly Plumbing | 1762 Keller Pkwy, Keller, TX | (817) 286-3446. Written by Haven Brady, Co-Founder. Locally owned, not a franchise. Every diagnosis on our trucks gets reviewed by a licensed master plumber. Texas License RMP-42199. Serving Keller, Southlake, North Richland Hills, Grapevine, Flower Mound, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County.
The roofer usually gets the first call. Which is funny, in a way, because it is late July in Keller and it has not rained in three weeks.
That brown ring on the ceiling appeared anyway. Or the paint bubbled. Or a corner started sagging over the hallway, and now everyone in the house walks under it a little faster. Water got up there somehow, and the sky had nothing to do with it.
Here is the thing about summer ceiling stains in North Texas: the suspect list is short, it is ranked, and the roof sits near the bottom of it from June through September. This guide walks the list in order. It shows you how to identify your suspect from the couch before anyone cuts drywall. It covers what to do about a wet ceiling in the next ten minutes. And it tells you honestly which trade to call for each answer, including when that trade is not us.
What a Ceiling Water Stain Means in a North Texas Summer
A stain is evidence, not a diagnosis. Water was there, possibly still is, and it rarely drips straight down. It travels along framing, wiring, and the top of the drywall before it surfaces, sometimes feet from where it started. So the stain marks the exit, not always the source.
What narrows it down fast is the calendar. The NOAA climate normals for DFW tell the summer story: long dry stretches and heat that keeps every air conditioner running nearly around the clock. No rain means the roof needs a special explanation to be guilty. Meanwhile the attic above your ceiling is holding the two most overworked water-handling machines in the house. The AC system pulls gallons of moisture out of your air every day. And in a lot of two-story homes around here, a water heater sits up there too, in a pan.
That is the ranked list in one sentence. In summer, suspect the machines in the attic first, the bathroom upstairs second, the pipes third, and the roof last, with a couple of impostors worth knowing about along the way.
How to Tell If a Ceiling Stain Is From the AC, a Pipe, or the Roof
Four clues sort most stains from the living room floor, no ladder required.
Location. Stand under the stain and think about what is above it. The attic air handler? The upstairs bathroom? Nothing but attic and roof? The map is half the diagnosis.
Calendar. When did it appear, and what was the weather doing? A stain born in a heat wave points at condensate. A stain that showed up the week after that one big storm points up.
Behavior. Trace the stain’s edge with a pencil and date it. If it grows during heavy AC weeks, that is the condensate system talking. If it grows after Saturday’s baths and showers, the bathroom above is leaking only when used. If it grows steadily no matter what, something pressurized is running around the clock.
The meter test. This is the decisive fork. Turn off every fixture and appliance that uses water, then watch your water meter for movement. A moving meter means a pressurized supply leak, and the ceiling is on borrowed time. A still meter clears the supply lines and points back at condensate, a drain that leaks only when used, or the weather.
| The clue | Points toward |
|---|---|
| Grows in hot, dry weeks while the AC runs hard | AC condensate system |
| Sits below the attic unit or along the condensate line’s path | AC condensate system |
| Sits below an upstairs bath, grows after showers or flushes | Bathroom seal or drain leak |
| Grows steadily, meter moves with everything off | Pressurized supply line |
| Appeared within days of a storm, dry spells stop it | Roof or flashing |
| Straight line or spots near vents, worse in humid spells | Duct sweat, an impostor |
The Five Suspects, Ranked for July
Suspect one: the AC condensate system. In a Keller summer this is the winner more often than everything else combined. A hard-running system pulls gallons a day out of your air. A slime plug blocks the little drain line, the pan overflows, and the ceiling below catches all of it. The early warnings are the backup line dripping at an eave and the float switch shutting the AC down. We wrote the full playbook, including the plumber-versus-HVAC answer, in our AC drain line guide for Keller TX. If your stain sits anywhere near the attic unit and it is cooling season, start there.
Suspect two: the attic water heater. Thousands of two-story homes around here keep a full water tank in the attic, sitting in a pan with its own drain. Tanks rust from the inside as they age. Relief valves weep, fittings seep, and the pan is the only thing between sixty gallons and your ceiling. If your water heater lives upstairs and the stain sits near it, treat it seriously and quickly. Our water heater leaking guide covers what each drip means, and our water heater lifespan guide explains why the trouble years start around seven or eight in our hard water.
Suspect three: the upstairs bathroom. Two very different leaks live here, and the pencil trick separates them. A pressurized line behind the wall leaks constantly and moves the meter. A seal leak, the shower pan, the tub’s overflow gasket, the wax ring under the toilet, leaks only when the fixture is used. That is why the stain grows on bath night and rests all week. Seal leaks are sneaky and cheap to fix compared to the drywall they ruin. Our toilet repair guide and shower repair guide cover the usual offenders.
Suspect four: a supply line in the ceiling. Less common, more urgent. A pinhole in a pressurized line runs all day and all night, and the stain grows on a schedule that ignores weather and habits alike. The meter test catches it, and finding the exact spot without demolition is precisely what leak detection equipment is for. That is our leak detection guide for Keller TX territory.
Suspect five: the roof, and the impostors. In a dry July the roof needs storm history to be guilty, though one loose flashing detail can bank water from a single storm and stain days later. And two impostors fool people every year. Sweating ductwork drips real water in humid stretches and paints straight-line stains along the duct path. And thermal ghosting, dust collecting on cooler ceiling lines, draws dark streaks that never were wet at all. If the stain is bone dry, perfectly straight, and near a vent, it might be neither leak nor water.
What to Do Right Now About a Wet or Sagging Ceiling
Ten minutes of the right moves saves most of the drywall and all of the panic.
If the ceiling is bulging or sagging, do not wait for it to decide. Put a bucket under the low point and open a small relief hole at the center of the bulge with a screwdriver. It feels wrong. It is right. A controlled drain through a coin-sized hole beats thirty pounds of water choosing its own exit.
If the stain touches a light fixture or a fan, treat that zone as live and kill the breaker to it before anything else. Water and house wiring settle their arguments without you.
Then cut off the source. AC suspect: turn the system off at the thermostat, because a resting AC makes no condensate. Meter moving: close the home’s main water shutoff, and if you are not sure where that is, our plumbing emergency preparedness guide is the five-minute homework that makes every emergency smaller. Take photos of everything as you go. Your insurance conversation will thank you.
What not to do: cut a big inspection hole on a guess. Water travels before it surfaces, and blind demolition usually finds framing, insulation, and regret in that order. Small relief hole yes. Exploratory surgery no.
Who to Call First
Match the trade to the suspect and nobody wastes your money.
Condensate line, attic water heater, bathroom seals, supply lines, and finding hidden leaks: that is plumbing. Around here the drain side is specifically plumbing under Texas licensing rules, which surprises people who called their AC company first. The refrigerant side of the AC, the coil and the charge, belongs to HVAC. Storm-pattern stains with attic evidence overhead belong to a roofer.
We are the first call for four of the five suspects, and we will say so plainly when the answer is one of the other two trades. It costs us a dispatch fee to be honest like that sometimes. It is still the only way we would want to be treated in your chair.
Polly Plumbing is a locally owned shop on Keller Parkway. We find ceiling leaks, fix the plumbing behind them, and put every finding in writing across Keller and Tarrant County.
Finding It Without Tearing the Ceiling Apart
The point of a professional visit is a small answer, not a big hole.
Moisture readings map how far the water traveled and which direction it came from. Thermal imaging spots the cool signature of wet material and running water behind drywall. Pressure testing confirms or clears the supply lines in minutes. Between those three, the source gets a street address before any saw comes out, and the access opening becomes the smallest one that reaches the fix.
You get the findings in writing, photos included, whichever trade the answer belongs to. If the fix is ours, the written quote is the invoice. If it is not ours, the written findings still make the right contractor’s job faster and your position stronger.
The Insurance Question
Worth knowing before you need it: policies generally treat sudden accidents and slow seepage very differently. A tank that lets go or a line that bursts is the kind of sudden event coverage is built for. A stain that grew quietly for a year reads as maintenance to an adjuster. That is one more reason to act on a stain the week you notice it, not the season after. Photograph early, keep dates, and hold on to the written findings. When coverage applies, our documentation gives the adjuster what they need. What your specific policy covers is a question for your agent, and asking it while your ceiling is dry is free.
What It Costs, the Short Honest Version
Finding the source is the modest part, and it is the part that protects every other dollar. The fix depends entirely on which suspect it is. A condensate clearing sits at the small end of our board, seal repairs are small jobs, and pressurized line repairs are quoted after the leak has an exact address. The written quote is the invoice, the $89 dispatch fee is waived for PollyCare members, and there is no emergency surcharge, even when the ceiling picks a holiday weekend.
Around the Area
Geography decides which suspect leads. The two-story floor plans across Southlake, Flower Mound, and newer Keller stack both machines in the attic, AC and water heater, directly over bedrooms. That is why their ceiling stains skew toward suspects one and two. North Richland Hills’ older single-story stock keeps equipment in closets, so its version of this problem shows up on floors instead of ceilings, cheaper to catch, same causes. And Grapevine’s lake humidity makes it our duct-sweat capital, where a surprising share of ceiling stains turn out to be the impostor rather than a leak at all.
We Are Close By
Polly Plumbing tracks down ceiling leaks and fixes the plumbing behind them from our shop on Keller Parkway, serving Keller, Southlake, North Richland Hills, Flower Mound, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County.
Ring on the ceiling and no rain in the forecast? Call (817) 286-3446. Live agents answer 24/7, we find it before anyone cuts, and the written quote is the invoice.
Frequently Asked Questions About Ceiling Water Stains
Why is there a water stain on my ceiling when it has not rained?
Because in a North Texas summer, the water above your ceiling usually comes from inside the house. The AC system pulls gallons of moisture out of your air daily, and a clogged condensate line overflows its pan onto the drywall below. Attic water heaters, bathroom seal leaks, and pressurized supply lines round out the list, with sweating ductwork as the common impostor. Rain is only required for a roof leak, which is why the roof sits near the bottom of the summer suspect list. Call Polly Plumbing at (817) 286-3446 and we will find yours.
How do I tell if a ceiling stain is from the AC or a pipe?
Use the calendar, the pencil, and the meter. Trace the stain’s edge with a pencil and date it. Growth during hot, heavy-cooling weeks points at the AC condensate system, especially if the stain sits near the attic unit. Growth after showers or flushes points at a bathroom seal leak above. Then run the meter test: with every fixture off, a moving water meter means a pressurized supply leak, while a still meter points back at condensate or a drain that only leaks when used. Those three clues sort most stains without a ladder.
Is a water stain on the ceiling an emergency?
A dry, stable stain is a this-week problem. A growing stain, a bulge, a sag, water near a light fixture, or a moving water meter is a right-now problem. Sagging drywall gets a bucket and a small relief hole at the center of the bulge. Nearby fixtures get their breaker turned off. An AC suspect gets shut down at the thermostat, and a moving meter gets the main water shutoff closed. Polly Plumbing answers live 24/7 with no emergency surcharge. Call (817) 286-3446.
Should I poke a hole in a sagging wet ceiling?
Yes, and it is the single most counterintuitive piece of good advice in home ownership. A sagging ceiling is a water balloon deciding when to burst. A small, controlled hole at the center of the bulge, opened over a bucket, drains the water on your schedule instead of the ceiling’s, and turns a collapse into a patch. What you should not do is cut large exploratory holes hunting for the source, because water travels along framing before it surfaces, and blind cutting mostly finds regret.
Does homeowners insurance cover ceiling water damage?
Often, when the cause was sudden: a burst line, a failed tank, an appliance letting go. Slow seepage that stained a ceiling over months usually reads as deferred maintenance to an adjuster, which is the expensive reason to act on a stain the week it appears. Photograph everything with dates, keep the written findings from the diagnosis, and ask your agent what your specific policy covers. When coverage applies, Polly Plumbing’s written reports and photos give the adjuster exactly what the claim needs.
Can I just paint over a water stain on the ceiling?
After the source is fixed and the material is fully dry, yes: a stain-blocking primer and paint finish the job properly, and a regular coat of paint without the primer lets the ring bleed back through. Painting before the source is fixed just hides the evidence while the damage continues, and painting over damp drywall seals moisture in, which is how stains graduate into mold problems. Find it, fix it, dry it, prime it, paint it, in that order.
Who do I call for water coming through the ceiling?
Match the trade to the source. The AC condensate system, an attic water heater, bathroom seals, and supply lines are all plumbing, and in Texas the drain side is specifically plumbing-licensed work. The AC’s refrigerant side belongs to an HVAC company, and storm-pattern leaks with attic evidence belong to a roofer. When the source is unclear, start with the trade that owns four of the five suspects, and expect an honest handoff if the answer belongs to someone else. Call Polly Plumbing at (817) 286-3446, day or night.