A ceiling stain is the end of the leak, not the start
Roof leak repair in Houston starts with an awkward fact: the place water drips into the room is rarely below the place it got into the roof. Water slips through a gap, runs along the underside of the decking or down a rafter, and only drips where something stops it.
So the stain on the hallway ceiling may come from a pipe boot six feet uphill, or from flashing at a wall on the other side of the attic. A leak repair that only patches the shingles directly above the stain often fails at the next storm. This page covers where Houston roofs usually let water in, how to tell a roof leak from an air conditioner leak, what to do safely while you wait, and what a lasting repair includes.
Houston Expert Roofers does not fix leaks. The number is a free line where an automated assistant takes the call around the clock, asks where the water is showing up and what part of greater Houston you are in, and transfers you to an independent, locally owned roofing company that finds and repairs the leak and bills you directly.
Where Houston roofs usually let water in
Most leaks start where the roof is interrupted: a pipe, a wall, a valley, an edge. The open middle of a sound shingle roof is rarely the culprit. A roofer tracing a leak checks these spots first.
| Spot | How it fails | Where the water often shows up |
|---|---|---|
| Pipe boots | The rubber collar around a plumbing vent dries out in sun and heat and splits | Bathroom, laundry or hall ceilings near interior walls |
| Wall and chimney flashing | Metal pulls loose, rusts, or was only ever sealed with caulk | Along an outside wall, around a fireplace, often only in wind-driven rain |
| Valleys | Leaves and pine needles dam the channel and push water under the shingles | Corners of rooms below where two roof slopes meet |
| Lifted shingles | Wind breaks the seal strip; the shingle lies back down but rain gets under it | Anywhere, typically after a windy storm |
| Nail pops | A nail backs out and pushes up the shingle above it | Small, steady spots, sometimes rust colored |
| Skylights and roof vents | Flashing at the uphill side fails or the unit's seal ages | Around the skylight well or the vent's ceiling opening |
| Roof edges | Missing or poorly lapped drip edge lets water wick back under the shingles | Exterior walls, soffits and fascia boards |
Pipe boots deserve special mention. They often wear out long before the shingles around them, and replacing one on an otherwise sound roof is a small job. If one boot has cracked, the others on the roof are usually the same age, so ask the roofer to check them all. The roof repair page covers other common repairs.
Roof leak or air conditioner leak?
In many homes the air conditioning air handler sits in the attic. Cooling pulls water out of the air, and that water drains away through a pan and a small pipe. When algae, dust or debris clogs the pipe, the pan can overflow and the water comes through the ceiling, looking exactly like a roof leak.
Points toward the roof
- Water appears during or right after rain and stops when it is dry
- It is worse in storms with strong wind
- The stain is near an outside wall, chimney, skylight or plumbing vent
- You can see shingles in the yard or a lifted shingle from the ground
Points toward the air conditioner
- Water shows up on a dry, hot day while the AC is running
- The wet spot is below where the air handler sits in the attic
- The AC shuts itself off (some units have a float switch that stops cooling when the pan fills)
- Water runs from a small overflow pipe on the outside wall, which some systems use as a warning that the main drain is blocked
A plumbing leak is the third possibility: a supply line in the attic or a wall can drip at any time, rain or not. If you are not sure, call the free line and say what you are seeing. It handles roofing and air conditioning calls on the same number and puts you through to the right kind of company.
Safe things to do while you wait
A leak during a storm feels urgent, and it is, but the risks of a fall or a shock are worse than a wet ceiling. Do not go on the roof, and do not go into the attic during a storm or on a wet, slippery ladder.
Stay off the roof. Wet, storm-damaged roofs are slick and the decking may be weak, so leave the ladder in the garage. Keep well away from downed power lines and report them to CenterPoint Energy or 911. Indoors, move belongings away from the leak, put a bucket or towels under the drip and keep people out of any room where the ceiling sags. Photograph the damage from the ground and inside the house, then call your insurer and a roofer.
- Protect what you can move. Slide furniture, rugs, electronics and boxes away from the drip, and lay towels or plastic sheeting down.
- Catch the water. A bucket or storage tub under the drip, with a towel in the bottom to stop splashing, and empty it before it overflows.
- Leave the ceiling alone. If the drywall bulges or sags, keep everyone out of the room and wait for a professional. Do not poke it or stand under it.
- Keep away from wet fixtures. If water is near a light fixture, ceiling fan or outlet, stay clear of it and tell the roofer and, if needed, an electrician.
- Write it down and take pictures. Photograph the stain, the drip and any damaged belongings, and note the time and the weather. If you see damage on the roof from the ground, photograph that too.
Why a small leak matters more in Houston
Houston's humidity means wet things stay wet. Insulation, drywall and decking that soak up water during a storm can take a long time to dry in a closed attic, and EPA mold guidance puts the window at a day or two: in most cases, it says, mold will not take hold if damp items are dried out within 24 to 48 hours. The EPA also notes that this is a guideline rather than a promise, and that mold can grow even when things are dried within 48 hours. Soaked insulation often has to be replaced rather than dried.
That is why a leak that only drips during heavy storms still deserves attention. Each storm wets the same wood and insulation again before it has dried, and the decking around a long-running leak can rot. When the roofer finds the source, ask it to check the decking and the insulation around it, and if drywall or insulation is soaked, ask whether you also need a water damage company to dry the house out.
Storms make old weak spots show up
Leaks often appear after a big storm because wind-driven rain finds gaps that ordinary rain never reaches. The May 16, 2024 derecho brought winds over 100 mph to parts of the Houston area, according to the National Weather Service, and Hurricane Beryl followed on July 8, 2024. A seal that broke in either storm and was never checked can still be letting water in. If your roof has not been looked at since then, mention that when you call.
What a lasting leak repair includes
Tracing the water to its entry point
A careful roofer looks at the attic as well as the roof, following water stains on the rafters and decking uphill to where they start. Ask whether the roofer went into the attic and ask for photos of the entry point, not just the shingles above your stain.
Fixing the part that failed
A new pipe boot, new step flashing at a wall, a cleared and relined valley, or new shingles where a seal broke. Roofing cement smeared over a gap is a stopgap. If the estimate says sealant, ask whether that is a temporary or a permanent repair.
Replacing wet or rotten decking
Soft decking under a long-running leak should be cut out and replaced before new shingles go back on. The estimate should give a price per sheet so the bill does not surprise you.
Checking for the same weakness elsewhere
Parts installed at the same time tend to fail around the same time. A roofer who finds one cracked boot or one loose flashing joint should check the rest, and tell you what it found.
Not sure if the water is from the roof, a pipe or the air conditioner? Call and describe what you see and when it happens. The line takes roofing and AC calls on the same number and puts you through to an independent local company.
Questions to ask the roofer about your leak
About the leak
- Where exactly is the water getting in, and can I see a photo of it?
- Did you check the attic, and how far did the water travel?
- Is the decking wet or soft, and what is your price per sheet?
- Is this a permanent repair or a temporary seal until a bigger job?
About the job
- What will you replace, by part, and what will it cost in writing?
- What does your workmanship warranty cover if it leaks again?
- Can you send your certificate of liability insurance?
- If the roof is near the end of its life, what would you recommend and why?
If the leak followed a storm and you plan to claim it, call your insurer before major repairs and read the roof insurance claims guide.
How a leak call works
- Call the numberAn automated assistant answers (832) 662-4107 at any hour and asks which service you need, since the line also takes heating, cooling, pressure washing and water damage calls.
- Describe the roofA leak, missing shingles, hail, a limb on the roof or an old roof you want looked at, plus your part of greater Houston and how urgent it is.
- Get put throughYour call is transferred to an independent, locally owned roofing company, which hears a short summary before it picks up.
- Deal with the roofer directlyIt inspects, quotes and does the work, and you pay it (or your insurer does, as you arrange). If it misses the call, it gets your name, number, city and need to call you back.
Texas has no state roofing license. No state agency licenses roofing contractors in Texas, and a 2025 bill to create one (HB 3344) did not reach a vote of the full House before the session ended. So check what you can: a certificate of liability insurance sent to you, a written contract with the full scope, a permit where your city requires one, local addresses you can drive past, and the shingle maker's warranty registration. Some cities also ask roofers to register. The line does not check any of this for you. How to check a roofer before you hire.
About this line: Houston Expert Roofers is a free phone line, not a roofing contractor. It answers your call and connects you with an independent local roofing company, which inspects, quotes and does the work, and which you pay directly. Companies may pay a referral fee. The line never charges you. Read how the line works.
Related services
- Roof Repair in Houston
- Roof Flashing Repair
- Emergency Roof Repair and Tarping
- Storm Damage Roof Repair
- Roof Inspection in Houston
- What to Do After Storm Damage to Your Roof