The water bill arrives $180 higher than last month. Nothing changed — same showers, same laundry, same sprinkler schedule. You walk the house looking for a drip and find nothing, because the leak isn't in the house. It's under it, in a copper line beneath four inches of concrete, and it's been running for weeks.
Welcome to the slab leak: Central Texas's signature plumbing failure, and the one that makes homeowners' minds jump to jackhammers and five-figure ruin. The reassuring truth up front: modern detection finds these without destruction, most repairs land in four figures not five, insurance covers more of the event than people assume, and there's a clean decision framework for the fork in the road — fix this leak, or retire the slab plumbing entirely.
Why us, why here: nearly every Central Texas home sits slab-on-grade over clay soils that swell with every storm and shrink with every drought, flexing the foundation and the rigid copper beneath it — while our hard water works on those pipe walls from the inside and hot-line expansion cycles fatigue them daily. Original-copper homes from the '70s through the '90s across Austin, Round Rock, and Pflugerville are the heart of the risk curve; it's a when-not-if population.
The early tells, so you can catch yours at the cheap stage: a meter that creeps with every fixture off, a water heater that runs constantly (hot-side leaks are the majority), warm patches underfoot, the sound of running water in a silent house, hairline floor cracks, musty baseboards. Any two of those together justify the detection visit.
Here's the money side, start to finish.
Skip the search-ad roulette. Tell us once, and we'll match you with a licensed, vetted Central Texas pro — price quoted before any work.
First the finding, then the fixing, then the fork.
Professional slab leak detection runs $250–$600 in the Austin area and is worth every dollar of it: electronic acoustic listening, line pressure isolation (which side, hot or cold), and thermal imaging for hot-line leaks converge on a location within a foot or two — before anyone cuts anything.
That last phrase is the point. The bad old sequence — jackhammer, look, jackhammer somewhere else — is extinct among competent outfits. Paying for precise location is what keeps the repair a single targeted opening instead of exploratory demolition, and adjusters recognize detection reports as claim documentation.
DIY confirmation before the call costs nothing: all fixtures off, watch the meter's leak dial for ten minutes. Movement means water is going somewhere; a hot water heater cycling in the night without draws points hot-side. Both observations belong on your service request — they shave diagnostic time.
| Approach | 2026 Central Texas range | When it fits |
|---|---|---|
| Direct access spot repair (through slab) | $1,500–$4,000 | Accessible location, first leak, sound system otherwise |
| Reroute overhead (abandon the run) | $1,500–$4,500 | The frequent smart play — new PEX through attic/walls, slab never opened |
| Epoxy pipe coating / lining | $2,000–$5,000 | Niche; multiple small leaks in otherwise intact lines |
| Whole-home repipe (PEX) | $6,000–$15,000 | Second-plus leak, aging copper throughout |
Drivers within the ranges: depth and flooring (repairing under tile or wood costs more than under carpet), leak position (bathroom cluster vs kitchen island vs under a wall), and how much flooring restoration follows — often quoted separately, and often the claim's largest line.
Note the reroute row: skipping the concrete entirely by running a new line overhead frequently costs no more than breaking the slab, ends that line's under-slab career permanently, and leaves the floor untouched. It's the first option to price, not the fallback.
The pattern across most Texas policies: the pipe repair itself — not covered (wear and tear). The access to reach it — jackhammering, tear-out — commonly covered. The resulting damage — flooring, drywall, drying — commonly covered. Detection — frequently covered as part of the claim. Net effect: on a $9,000 slab-leak event, the homeowner's true out-of-pocket is often the four-figure plumbing portion, not the headline.
The variables that decide claims: sudden-vs-gradual language (this is why documenting the discovery date and acting promptly matters), policy-specific slab endorsements or exclusions (read yours before you need it), and documentation quality. Photograph the meter, the bills, the detection report, everything.
Two claim-craft tips from the pros we match: file with the detection report in hand rather than a vague 'we think it's the slab,' and keep the plumbing invoice itemized so covered access separates cleanly from uncovered repair. Insurers pay documented specifics and argue with vibes.
The crossover math is unsentimental. One leak in an otherwise healthy system: fix or reroute that line, move on. A second leak in a different run within a few years: the copper is announcing a pattern, and every future leak carries its own detection, access, repair, and flooring bill — call it $3,000–$6,000 per episode all-in. Against that recurring tax, a $6,000–$15,000 one-time PEX repipe that retires every under-slab line starts winning by the second episode, decisively by the third.
Age and material weight the fork: soft-copper-era homes with known corrosion patterns, houses with prior epoxy patches, and anything already showing pinhole tendencies argue for the permanent answer. A five-year-old build with a construction-defect leak argues the other way.
Repipe reality check: it's a 3–5 day project, run room by room with water restored nightly, walls patched and painted after. Disruptive, survivable, and finished — as in, the category of problem is over. Homeowners consistently report the same postscript: they stopped listening for water.
The pros in our network quote the fork explicitly — this leak's number beside the retire-it-all number — because that comparison, not either price alone, is the actual decision. Anyone who quotes only the repipe on a first leak, or only the patch on a fourth, is selling their inventory rather than your answer.
Today: run the meter test, note the reading morning and night with fixtures off, and feel floors along hot-line paths (hall bathrooms and kitchens are common). Photograph the current water bill next to last quarter's.
This week: book detection — $250–$600 to convert anxiety into a location and a quote. Shut off the water heater's recirculation pump if you have one (it masks and accelerates hot-side loss), and if the leak dial is spinning fast, use the main shutoff overnight and re-pressurize mornings.
What not to do: ignore it into your foundation. Beyond the metered water, sustained under-slab moisture moves clay soil, and slab movement is the only bill in this story with another zero on it. The leak found this month is a plumbing problem; the leak found next year can be a structural one.
One form starts the process: describe the symptoms, and a licensed, leak-equipped local pro handles detection through decision — with every number quoted before any concrete is touched.
The cheap version, from a Pflugerville ranch home: a $210 bill jump noticed in month one, meter test run that weekend, detection booked Tuesday ($425), hot-side leak located under the hall bath, and the line rerouted overhead through the attic in PEX by Friday — $2,900 all-in, insurance covering the modest access work, floor never opened. Total episode: twelve days, one unpleasant but contained check. The expensive version, from an older South Austin home: the same bill jump ignored across a summer ('sprinklers, probably'), then cupping wood floors, then a door that stopped latching — by discovery, months of moisture had worked on the clay, and the project involved foundation consultation, extensive flooring, and a whole-home repipe the copper had been requesting for years. Same originating pinhole; five figures of difference, all of it calendar. Every slab leak article says 'act early' — these two invoices are what the advice costs and saves, respectively. The meter test is free and takes ten minutes. Run it the first month the bill testifies.
One more budgeting note: get the flooring conversation started early. Tile matching on a 2005 build is its own small saga — discontinued lines, dye-lot drift — and homeowners who locate spare boxes in the garage attic (builders often left them) or source matches while the plumbing is being scheduled compress the whole episode by weeks. The repair is a day; the floor is the schedule.
And if you're buying a home in the risk-age band: a pre-purchase sewer camera run and a glance at the seller's water bills are cheap diligence that has re-priced more than one Central Texas contract. Slab history is knowable before it's yours.