Slab Leak Detection ProsSlab leak detection Allen residents rely on means finding the exact leak before anyone breaks the floor. That is all our Allen slab leak detection network does. If your Allen water bill has jumped or a floor feels warm, a pipe under your slab may be leaking. Licensed plumbers serving Collin County use pressure tests, acoustic listening and thermal imaging to pinpoint the leak before any concrete is opened, saving your floors and money.
- Acoustic
- Thermal
- Tracer gas
- Pressure
- Camera
What makes slab leak detection in Allen different
Collin and Denton County sit on Blackland Prairie clay, among the most expansive soils in Texas. As it swells and shrinks, pipes under the slab bend, rub against concrete and pull at their fittings.
Many Allen homes were built in the 1990s and 2000s and now have 20–30-year-old copper under the slab.
Serving homes across Allen, including neighborhoods near Allen Premium Outlets, Watters Creek, Celebration Park.
Does a brand-new home in Allen need slab leak detection?
Not routinely, but new homes do leak, usually at a fitting or from a pipe nicked during construction. If you see a warm spot or a high bill, test right away and tell your builder while the warranty applies.
Does your Allen home need slab leak detection?
- 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 Allen 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.
How Allen slab leak detection works, step by step
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.
What a slab leak detection visit in Allen looks like
Allen slab leak detection follows the same careful path on every job, but the details depend on your home. A licensed plumber who serves Collin County arrives with pressure gauges, an acoustic ground microphone, a thermal camera and, when needed, tracer gas equipment.
Before any listening starts, the plumber rules out toilets, faucets, irrigation and the water heater, then pressure-tests the system. Closing the cold inlet at the water heater shows whether the leak is on the hot or cold side.
Next, the line is traced and the slab is scanned. Acoustic listening finds the point where escaping water is loudest, thermal imaging confirms hot-water leaks, and tracer gas handles the quietest leaks. Two readings must agree before the spot is marked.
You keep a written report: which line leaks, where, how it was confirmed, and photos. It is the document insurers and water utilities ask for, and it gives any repair plumber a precise starting point.
We arrange slab leak detection for homes all over Allen, from neighborhoods near Allen Premium Outlets to those around Celebration Park. Most visits take two to four hours.
Allen slab leak detection specialist vs. a general plumber
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 Allen 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 Allen?
Shut off the main water valve and call now. We’ll connect you with a licensed slab leak specialist.
Allen homes and the pipes beneath them
Across Allen: Older 1960s–80s homes with cast iron and copper, and brand-new post-tension slabs with PEX. Knowing what pipe is under your floor tells the plumber which slab leak detection method will work best.
Copper supply lines
Common in homes built from the 1960s through the early 2000s. Copper wears where it rubs against concrete or gravel, and pinhole leaks show up as homes pass 25–40 years old. Acoustic listening finds them well.
Cast-iron drains
Standard in homes built before about 1980. Cast iron rusts from the inside and cracks as the slab moves. Drain leaks never show on the water meter, so a hydrostatic test and camera inspection are used.
Polybutylene
Gray plastic pipe installed from about 1978 to 1995. It is known for failing at fittings. Tracer gas and pressure testing are often the best ways to locate leaks in it.
PEX and newer plastic
Used in most homes built since the 2000s, often run from a manifold. PEX leaks are usually at fittings or where the pipe was nicked during construction. Each run can be pressure-tested from the manifold.
Slab leak detection services in Allen
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.
What slab leak detection costs in Allen
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.
What makes slab leak detection cost more in Allen?
Larger homes, more plumbing lines, drain testing and leaks that are hard to hear take longer to find. Most detection visits still fall in the $150–$600 range, and you get the price before the visit.
Before you book slab leak detection in Allen
You can often confirm a hidden leak yourself in about two hours, with nothing more than your water meter.
- Turn everything off. Faucets, dishwasher, washer, ice maker, sprinklers and pool fill.
- Find your meter. It is usually in a box near the street. Read the number or take a photo.
- Wait one to two hours. Use no water at all during that time.
- Read it again. If the number moved, or the small leak indicator is spinning, water is escaping.
- Narrow it down. Close the house shut-off. If the meter keeps moving, the leak is in the yard line; if it stops, it is inside, possibly under the slab.
Slab leak detection in Allen, done the careful way
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.
Questions about slab leaks in Allen?
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) 000-0000My Allen home was built in the 1990s. Is the copper under my slab wearing out?
It may be. Copper in many 1990s Allen homes is now 25–30 years old, and lines rubbing against concrete or gravel can wear pinholes, especially on the hot side. A warm spot on the floor or a rising bill is a good reason to test.
My new home in Allen already has a leak. Is that normal?
It happens. In new homes, leaks usually come from a failed fitting, a nicked pipe or settling soil, not worn-out pipe. If you're still under the builder warranty, document the leak and contact the builder before any repair.
Does Blackland Prairie clay make slab leaks more common in Allen?
It's a big factor. Blackland Prairie clay can swell and shrink more than almost any soil in Texas. Over years of wet and dry cycles, that movement stresses the pipes in and under your slab.
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.
Is a slab leak in my Allen home an emergency?
Water coming up through the floor, a sewer smell or a fast-spinning meter needs help the same day. A slower leak should still be checked within days, because water under the slab can wash out soil and grow mold.
Why is my Allen 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.
How soon does your Allen home need slab leak detection?
Call the same day
- Water coming up through the floor
- Sewer smell inside the home
- Meter spinning fast with everything off
- A large warm or wet area
Shut off the main water valve first.
Book this week
- Meter moves slowly with everything off
- One warm spot on the floor
- Water heater running constantly
- Bill up for a second month
Keep watching
- A single high bill with an explanation
- Hairline cracks with a normal meter test
- Slow drains in one fixture only
Repeat the meter test monthly.
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.
Last updated 2026-10-23