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Flower Mound, Denton CountySlab Leak Detection in Flower Mound, TX
A slab leak is a broken pipe beneath your home's concrete foundation, and in Flower Mound it can run for months unnoticed. Non-invasive detection by a licensed plumber locates it precisely, so you know exactly where it is before anyone touches your floor.
- Acoustic listening
- Thermal imaging
- Tracer gas
- Pressure & hydrostatic tests
- Camera inspection
Why slab leaks happen in Flower Mound
Tarrant and Denton County clays expand when wet and shrink in summer, and the slab moves with them. Pipes cast into the slab or buried beneath it flex, rub and eventually crack.
Flower Mound's large homes often have long hot-water runs under the slab, and long runs give a leak more places to start.
Serving homes across Flower Mound, including neighborhoods near Grapevine Lake, Lakeside DFW, Flower Mound Town Hall.
Why do Mid-Cities homes in Flower Mound get more drain problems as they age?
Homes built in the 1960s–80s often have cast-iron drains that rust and crack under the slab, and the clays of Denton County keep the slab moving. Drain leaks don't show on your water meter, so a hydrostatic test is the way to check them.
How we find a slab leak without tearing up your floor
The same nine steps on every job, so you know what’s happening and why. Read the full process →
Listen and look first
The plumber hears what you've noticed and walks the home to look for clues.
Rule out the easy causes
Toilets, faucets, irrigation, the water heater and the AC drain are checked so you don't pay to search for the wrong leak.
Confirm the leak with the meter and a pressure test
A meter test and a pressure test prove water is escaping from the plumbing.
Isolate the leaking line
Hot, cold and branch lines are separated so the search focuses on the one that's leaking.
Test the drains, if needed
Drain leaks don't show on the meter, so they get their own hydrostatic test and camera check.
Trace the pipe's route
An electronic locator maps where the leaking line actually runs under the floor.
Pinpoint the exact spot
Acoustic listening, thermal imaging and tracer gas find where the water is escaping, and two methods must agree.
Scan the slab and mark the leak
The slab is checked for steel tendons and rebar, and the leak is marked on the floor.
Get your written report
You receive the leak's location, the line, the readings and photos in writing.
Signs of a slab leak in your Flower Mound home
- Water bill jumped with no change in use
- Meter keeps moving with everything off
- Warm spot on tile, wood or carpet
- Running-water sound when nothing is on
- Water heater runs constantly
- Damp carpet, cupped wood, musty smell
- Sewer smell or slow drains
- New cracks or sticking doors
My carpet is damp near a wall in my Flower Mound home. Is it a slab leak?
It can be. Water from a leaking line under the slab often wicks up at the edges of a room or near a plumbing wall. Rule out a leaking toilet, tub or water heater nearby first, then test the lines under the floor.
What our slab leak detection covers in Flower Mound
We do one thing: find leaks under concrete slabs. Every visit is done by an independent, licensed Texas plumber who specializes in leak detection, so you pay to find the leak, not to break concrete searching for it.
Water Line Leaks
Find leaks in the pressurized supply lines buried in or under your slab.
Hot-Water Line Leaks
Thermal imaging traces warm spots and leaking hot-water runs.
Drain Line Leaks
Hydrostatic and isolation tests find drain leaks that never show on your meter.
Pressure Testing
Confirm a leak exists and measure how fast the line loses pressure.
Line Isolation & Tracing
Separate hot, cold and branch lines and map where they really run.
Acoustic Pinpointing
Ground microphones hear escaping water through the concrete.
Tracer Gas Detection
For very quiet leaks and plastic pipe, gas rises at the leak point.
Written Leak Report
Exact location, readings and photos for your insurer or water utility.
Find the leak first. Don’t pay anyone to search.
Most of the cost of a slab leak comes from searching for it and repairing the floor afterward. Slab leak detection is all we do, so you get an exact location before anyone touches your floor.
Licensed Texas plumbers
All work is done by independent plumbers licensed in Texas who will show their license number on request.
Typical prices up front
Know the usual range before anyone arrives, and get a written quote before work starts.
Documentation you can use
Photos, readings and a written summary for your insurer or your water utility’s leak credit.
Slab leak specialist vs. general plumbing contractor
Many general plumbers do excellent work. The difference is focus and equipment when the leak is hidden under concrete.
| What matters | Slab leak detection specialist (our network) | Typical general plumbing contractor |
|---|---|---|
| Main focus | Only finding hidden leaks under slabs | Installs, repairs and remodels across all plumbing |
| Detection tools | Acoustic ground mics, thermal imaging, tracer gas, line tracing | Varies; often a pressure test and visual inspection |
| Locating the leak | Pinpointed before any concrete is opened | May open the floor in more than one place to search |
| Drain leaks under slab | Hydrostatic, isolation test and camera find the broken section | May recommend replacing the whole drain system |
| After the leak is found | Exact spot marked and documented; you choose who fixes it | Often moves straight into its own repair or repipe |
| Paperwork | Written report with photos for insurance and water credits | Usually an invoice only |
| Typical cost to locate | $150–$600 in most Flower Mound homes | Varies; exploratory openings add cost |
Tip: whoever you call, ask which detection methods they use and whether they’ll pinpoint the leak before opening the slab.
Water coming up through the floor in Flower Mound?
Shut off the main water valve and call now. We’ll connect you with a licensed slab leak specialist.
What slab leak detection usually costs
Published national and Texas ranges. You get the price before the visit.
Slab Leak Detection
- Meter & pressure testing
- Hot/cold line isolation
- Acoustic & thermal pinpointing
- Leak marked on the floor
- Written report with photos
What raises the price
- Larger homes with more lines
- More than one leak
- Very quiet leaks needing tracer gas
- Drain testing (a hydrostatic test is typically about $250)
- After-hours visits
What it doesn’t include
- Breaking or patching concrete
- Pipe repair or rerouting
- Foundation work
- Mold cleanup
We only do detection. You get the exact location and choose who does any repair.
Sources: This Old House, Angi/HomeAdvisor via Bob Vila.
Will I still pay for detection if no leak is found?
Usually yes, because detection is a diagnostic service. If no slab leak is found, you still learn where the water isn't going, which rules out costly guesses. Ask about the fee before the visit.
Insurance and slab leaks in Texas
Coverage depends on your policy and the cause. The Texas Department of Insurance has long said the standard HO-B policy covers damage to the dwelling, including the foundation, from an accidental discharge of water from a plumbing system. Many policies still exclude wear and tear, the pipe itself, and mold.
What helps your claim: shut off the water, protect your belongings, and get the leak documented by a licensed plumber before the adjuster visits.
Ask for a leak credit
Many Texas cities and MUDs credit part of the water lost to a hidden leak once it’s repaired. Most want a paid plumber’s invoice and a request within a set number of days, and allow one credit a year.
Keep your invoice, and call your utility soon after the repair to ask about its rules and deadline.
Questions about slab leaks in Flower Mound?
Still not sure if you have a slab leak? Call and describe what you’re seeing. A licensed plumber will tell you whether it’s worth a visit.
Call (000) 000-0000Why do large Flower Mound homes seem to get hot-water slab leaks?
Big homes often have long hot-water runs under the slab. Hot lines expand and contract every day, and that movement can wear a pinhole where pipe touches concrete or gravel. A warm spot on the floor is the classic sign.
Can clay soil in Denton County crack the pipes under my slab?
Yes. Denton County clays swell after rain and shrink in drought, and the slab moves with them. Pipes in or under the slab flex and rub until a joint fails or a pinhole forms.
Do older homes in Flower Mound have cast-iron pipes under the slab?
Many homes built in Flower Mound before about 1980 have cast-iron drains under the slab, and some are now 50 years old. Cast iron rusts and cracks over time. A hydrostatic test shows whether your drains hold water.
Why is my Flower Mound water bill so high when I can't see a leak?
A leak under the slab runs all the time, out of sight. Turn off every fixture and watch the meter for one to two hours. If it moves, water is escaping, and a plumber can find where.
Why is there a warm spot on my floor?
A warm spot on tile, wood or carpet is a classic sign of a leaking hot-water line under the slab. Thermal imaging can confirm it and trace the line. Turn off the water heater's cold inlet and call a plumber.
How long does slab leak detection take in Flower Mound?
Most leaks are located in two to four hours. Complex homes, multiple leaks or drain problems can take longer. You'll get the results, the exact location and a written report before anything is opened.
Last updated 2026-10-23