Post-Tension Slab Leak Repair in Missouri City is what we do when water starts creeping up through a post-tension foundation. If your water bill jumped, a baseboard stays damp, or the floor feels warm in one spot, the leak is likely under the slab and near a tension cable. We locate it with acoustic and thermal gear, then repair the line with minimal concrete cutting. Licensed, insured, and working Fort Bend County jobs every week.
Post-Tension Slab Leak Repair in Missouri City means finding a pressurized water line leak that sits under a concrete slab reinforced with tensioned cables, then fixing that line without cutting a cable. The cables run through the slab in a grid, so you cannot just jackhammer anywhere. We map the cable layout first, use electronic leak detection and acoustic listening devices to pinpoint the leak, then open a small access point and repair the copper or PEX pipe. After the repair we pressure test the line and patch the concrete.
Most of the homes we see in Sienna, Riverstone, and Quail Valley were built on post-tension slabs, and the hot water lines under them take a beating. Fort Bend County soil shifts with our wet-dry cycles, and that movement stresses fittings and copper. A post-tension slab leak detection Missouri City TX call usually starts the same way: a high water bill, a warm spot on the floor, or the sound of running water when nothing is on. The sooner you call, the smaller the repair.
Every job includes detection, cable mapping, the repair itself, a pressure test, and the concrete patch. We quote it as one price so you are not paying for each step separately. Here is exactly what is covered.
We pressurize the system and use acoustic listening devices plus a thermal imaging camera to pinpoint the leak. This is included, not billed as a separate diagnostic. You get the exact location before any concrete is cut.
A pipe locator and slab scan mark the tension cable grid on your floor. This protects the tendons during cutting and is included on every post-tension job. Skipping it is how foundations get damaged.
We repair the failed section using copper, PEX pipe, or a SharkBite fitting as appropriate, with new couplings and sealants. Materials are included in the quoted price. We replace a longer section when pinhole corrosion is clustered.
After the repair we pressure test at working pressure for 30 minutes and record the result. You receive photos and a written summary suitable for an insurance claim. No test, no walkthrough, no invoice.
We backfill and patch the access point with concrete patch matched as closely as possible to your existing slab. The patch is structural, not cosmetic filler. Full floor covering replacement is handled by your flooring contractor if needed.
Call (281) 326-6169 and describe what you are seeing: the water bill amount, where the floor is warm, any sound of running water. We ask a few questions to narrow the likely line, then schedule a same-day or next-morning visit. You get a window, not a vague all-day promise.
On site we isolate the system, pressurize the lines, and listen with acoustic equipment. A thermal imaging camera confirms the temperature signature of a hot water line leak. This step usually takes 60 to 90 minutes and tells us exactly where to open the slab.
Before we cut, we mark the post-tension cable grid using a pipe locator and slab scanning. You see the layout on the floor. This is the step that separates a proper repair from a risky one, and it is why we will not skip it to save an hour.
We cut a small access point, expose the failed section, and repair it with copper, PEX, or a SharkBite fitting depending on what is there. Then we pressure test the line at working pressure for 30 minutes. If it holds, we patch the concrete and clean up.
We walk the repair with you, show the pressure test reading, and explain what to watch for over the next two weeks. You get photos and a written summary the same day. If a reroute makes more sense than another patch, we tell you now, not after a third leak.
Purpose-built equipment, used by trained technicians — so the job is done accurately the first time.
Amplifies the sound of pressurized water escaping a pipe so we can hear the leak through concrete. It narrows the search area to within a few inches before we cut.
Ground microphones placed on the slab surface confirm the leak point. We use them alongside pressure testing to avoid false positives from irrigation or drain noise.
Reveals the temperature signature of a hot water line leak under the slab. On a Missouri City afternoon, that warm spot is often visible in minutes.
We isolate and pressurize each line to confirm the leak and verify the repair. Every job ends with a 30-minute hold test at working pressure.
Maps the post-tension cable grid and pipe routing before any concrete is opened. This is the step that keeps the repair clear of tensioned tendons.
Lets us reach under-slab lines from outside the foundation when cutting the floor is not the best option. Common on finished-floor homes in Riverstone and Sienna.
Make clean, code-correct connections on copper and PEX without open flame. Faster than soldering and safer inside a confined access hole.
A Sienna homeowner's water bill went from $95 to $340 in one cycle. The master bath floor was warm to the touch and the baseboard near the tub stayed damp. Two prior plumbers could not locate the source and suggested tearing out the bathroom floor.
We found the leak with thermal imaging in under an hour, mapped the cable grid, and opened a 20-inch access point between the tendons. The copper line was repaired and held 80 psi for 30 minutes. The bill returned to normal the next cycle.
A Quail Valley home had a slab leak repaired in 2023. Two years later a second warm spot appeared six feet away. The homeowner did not want another cut through the hallway tile and asked about alternatives.
We tested the surrounding line and found clustered pinhole corrosion. Instead of a second patch, we rerouted the hot water line through the attic in PEX. The old line was abandoned in place. Total job took two days and no flooring was removed.
A Riverstone homeowner had a post-tension plumbing leak under a finished wood floor in the living room. Cutting the slab would have meant removing and replacing roughly 60 square feet of flooring at their own cost.
We tunneled under the foundation from the side yard and reached the failed line without touching the floor. The repair held at working pressure and the access was backfilled. The homeowner kept the original flooring intact.
A hidden leak under a post-tension slab shows up in ways that do not always look like plumbing. Here are the problems we get called for most often in Missouri City and how we handle each one.
Ask a pro →We run a high water bill leak investigation: meter isolation, pressure testing, acoustic listening, and a thermal scan. Once we confirm the line, we repair it and pressure test the whole run. Most homeowners see the bill normalize the next cycle.
We confirm the hot water line with thermal imaging, map the cables, and repair the failed section. If the copper is corroded beyond the leak point, we replace a longer run rather than patch it twice.
We use a moisture meter and pressure test to separate a slab leak from condensation. If it is the slab, we repair the line, dry the area, and document the moisture readings before and after so you can track the fix.
Shut off the main and call us. We isolate the hot and cold sides, locate the leak with acoustic equipment, and repair it. Active leaks get priority scheduling, including nights and weekends.
$1,800 - $4,500 depending on access, method, and line condition
Typical 2026 pricing for post-tension slab leak repair in Missouri City runs $1,800 to $4,500 depending on access and repair method. Detection alone is $250 to $450. A straightforward hot water line repair with easy access sits near the low end. Dense cable grids, deep access, or a full reroute push toward the high end. We quote the complete job in writing before we cut, so the approved number is the final number. No hourly surprises, no add-ons discovered mid-job.
You are paying for detection accuracy, cable-safe access, a tested repair, and documentation your insurance can use. A cheap cut-and-guess job that damages a tendon or misses the leak costs far more than doing it right the first time.
A leak under an open garage slab is a much smaller job than one under a tiled hallway or a load-bearing wall. Access drives most of the labor cost, and it is the single biggest variable in your quote.
Tighter cable spacing means less room to cut safely. We may need to tunnel from outside instead, which changes the price. We map the grid during detection so this is known before we quote.
A single-section repair is the least expensive option. A reroute through the attic or walls costs more upfront but often saves money if the line has failed before or shows widespread corrosion.
PEX repairs are usually faster and cheaper than copper. Copper requires proper couplings and either press fittings or soldering, which adds labor time. We use lead-free materials on every potable water repair.
“Our water bill jumped from $90 to $310 in one month and we could not find the leak. The crew came out, used a thermal camera, and found a hot water line leak under the slab in about an hour. They mapped the cables, cut a small square, and had it repaired and pressure tested the same day. Concrete patch looks clean. Worth every dollar.”
Denise R.Homeowner, Sienna
✓ Verified“We had a warm spot on the tile for weeks and kept putting it off. Finally called and they confirmed a post-tension cable leak repair was needed near the kitchen. They showed me the cable layout before cutting, which I appreciated. Repair held at 80 psi for the full test. No more warm floor and the bill is back to normal.”
Marcus T.Homeowner, Quail Valley
✓ Verified“Two other plumbers wanted to tear out half the hallway. This team scanned the slab, found the leak under a bathroom wall, and tunneled in from outside instead. No flooring damage. They gave me photos and a pressure test report for my insurance claim. Adjuster approved it without a fight.”
Priya S.Homeowner, Riverstone
✓ VerifiedMost post-tension slab leak repairs in Missouri City run $1,800 to $4,500 in 2026, depending on access difficulty and whether the line can be rerouted. Detection alone is $250 to $450. A simple hot water line repair under a slab with easy access sits at the low end. Deep access, cable-dense areas, or a full reroute push it higher. We quote the whole job in writing before we cut.
Yes. We map the cable grid with a pipe locator and slab scanning before any concrete comes up, then open a small access point between the tendons. The cables stay untouched. That is the standard approach for repair post-tension slab leak Missouri City work, and it protects both the slab and your foundation warranty.
The two main causes are copper pipe corrosion and soil movement. Fort Bend County clay expands and contracts with our wet-dry cycles, which flexes the slab and stresses fittings. Copper lines under hot water also corrode from the inside out over 20 to 30 years. A high water bill leak investigation usually confirms which one you have.
It depends on the policy. Many Texas homeowners policies cover access and repair for a sudden pipe failure but exclude long-term seepage and the concrete patch. We document the leak with photos and pressure test results so you can file with real evidence. Call your adjuster early, and we will provide whatever paperwork they need.
Slab Leak Tunneling (Under-Slab Access)When cutting through the slab is not the best option, we tunnel under the foundation from outside. This keeps your finished floors intact and is often the right call for post-tension slab leaks in Missouri City where the cable grid is dense or the leak sits under tile.Explore →
Epoxy Pipe Lining (Trenchless)For copper lines with widespread corrosion, epoxy pipe lining seals the inside of the pipe without digging. It is a strong fit when a post-tension plumbing leak Missouri City repair would otherwise mean multiple access points. We check line condition first to confirm it will hold.Explore →
Pipe ReroutingIf a line under the slab has failed more than once, rerouting it through the attic or walls often costs less over time than another slab cut. We run the new line in PEX or copper and abandon the old one in place. Common on older Quail Valley homes.Explore →
Whole-House RepipingWhen corrosion is throughout the system, repiping solves the source instead of chasing leaks one at a time. We replace copper with PEX or new copper, usually in two to four days. It pairs well with a post-tension foundation leak repair Missouri City project on a 1980s or 1990s home.Explore →
Water Service Line Leak RepairThe line from the meter to your house can leak under the yard and look like a slab leak inside. We isolate the service line during detection, so you are not paying for a slab cut when the real problem is outside. Repair or replacement depends on line material and depth.Explore →
Hot Water Line Leak RepairHot water lines fail more often under post-tension slabs because heat accelerates copper corrosion. A warm spot on the floor is the classic sign. We repair the failed section and pressure test the rest of the hot side while we are in there.Explore →
High Water Bill Leak InvestigationIf your bill doubled but you see no water, we run a full investigation: meter test, pressure test, acoustic listening, and thermal scan. You get a written finding whether or not a repair is needed. This is the fastest way to confirm a hidden post-tension slab leak.Explore →
Copper Pipe RepairWe repair copper with proper couplings and lead-free solder or press fittings, then test at working pressure. For pinhole clusters, we often replace a longer section rather than patch the same pipe twice. Copper repair is frequently part of a post-tension slab leak fix.Explore →We answer the phone 24/7, run same-day detection, and quote the full repair in writing before we cut. Licensed, insured, and working Fort Bend County every day. Call (281) 326-6169 now and let us find it before it gets worse.
Call Now (281) 326-6169 →Call us at (281) 326-6169 or email [email protected]. We answer the phone 24/7 for emergencies and respond to emails within one business hour. Our office is in Missouri City, and we serve all of Fort Bend County.