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California Service · Detection

Slab Leak Detection in California

Pinpoint hidden leaks under concrete foundations without breaking up the whole slab.

Quick answer: Slab leak detection across California. Acoustic and thermal imaging locate the exact leak point under your foundation before any concrete is opened.
Already know where the leak is? See our Slab Leak Repair page for how the fix works.
Slab Leak Detection illustration
Slab leak detection equipment displaying a spectral analysis graph while a technician tests a tile floor
Customer Success Story · Slab Leak Detection

Sam R., a Signal Hill, Long Beach homeowner, had been living with a hot spot on the floor, or one area of carpet or tile that's always warm for weeks before calling us. Because slab leaks are hidden under structural concrete, guesswork digging is expensive and destructive. We combine electronic amplification with thermal imaging to narrow the leak to a small, marked area, so any follow-up access work is as limited and targeted as possible. No work beyond the single marked spot was needed, which kept the repair fast to schedule.

— Sam R., Signal Hill, Long Beach

What is slab leak detection?

A slab leak happens when a hot or cold water line running beneath your home's concrete foundation develops a crack, pinhole, or corrosion failure. Left alone, it can warp flooring, feed mold behind walls, and quietly inflate your water bill for months. Our technicians use acoustic listening equipment, infrared thermal cameras, and static pressure testing to find the leak's exact position before a single inch of concrete is opened.

Because slab leaks are hidden under structural concrete, guesswork digging is expensive and destructive. We combine electronic amplification with thermal imaging to narrow the leak to a small, marked area, so any follow-up access work is as limited and targeted as possible.

Signs you may need slab leak detection

  • A hot spot on the floor, or one area of carpet or tile that's always warm
  • The sound of running water when every fixture in the house is off
  • A water meter that keeps spinning with all taps closed
  • Unexplained cracks in flooring, drywall, or the foundation itself
  • Mildew smell or unexplained humidity in ground-floor rooms
  • A steadily climbing water bill with no change in household usage

How slab leak detection works

  1. Schedule your inspection

    Call or request an appointment online. Same-day slots are available across California for active leaks.

  2. On-site diagnostic

    A technician arrives with acoustic listening equipment, thermal imaging, and pressure or camera tools matched to your specific leak type.

  3. Pinpoint & confirm

    The leak's exact location is marked and explained to you in plain terms, so nothing gets opened up on a guess.

  4. Clear next steps

    You receive a written diagnostic report you can hand to your plumber, restoration team, or insurance company, with repair or fix options discussed on the spot.

Slab Leak Detection across California

We provide slab leak detection for homeowners, property managers, and businesses throughout the state, including these service areas:

Los Angeles, CASan Diego, CASan Francisco, CASan Jose, CAFresno, CASacramento, CALong Beach, CAOakland, CABakersfield, CAAnaheim, CASanta Ana, CARiverside, CAStockton, CAIrvine, CAChula Vista, CAFremont, CASan Bernardino, CAModesto, CAFontana, CAOxnard, CAMoreno Valley, CAHuntington Beach, CAGlendale, CASanta Clarita, CAGarden Grove, CARancho Cucamonga, CASanta Rosa, CAOntario, CALancaster, CAElk Grove, CACorona, CAPalmdale, CASalinas, CAPomona, CAHayward, CAEscondido, CATorrance, CASunnyvale, CAOrange, CAFullerton, CAVictorville, CAPasadena, CASanta Clara, CAClovis, CASimi Valley, CAVallejo, CAConcord, CAFairfield, CAThousand Oaks, CABerkeley, CAAntioch, CATemecula, CARichmond, CAMurrieta, CACarlsbad, CACosta Mesa, CADowney, CARialto, CAWest Covina, CAEl Monte, CAOceanside, CARoseville, CAVisalia, CAMenifee, CASanta Maria, CASan Buenaventura (Ventura), CAJurupa Valley, CAChico, CAVacaville, CASan Mateo, CABurbank, CAHesperia, CATracy, CAEl Cajon, CAInglewood, CADaly City, CAMerced, CAVista, CANorwalk, CAChino, CAManteca, CASan Marcos, CAIndio, CARedding, CAHemet, CAFolsom, CACarson, CACompton, CAMission Viejo, CASanta Monica, CAWestminster, CARancho Cordova, CASanta Barbara, CACitrus Heights, CALake Forest, CASan Ramon, CAWhittier, CAMountain View, CASan Leandro, CATurlock, CAUnion City, CAYorba Linda, CAWalnut Creek, CAApple Valley, CARedwood City, CANewport Beach, CADiamond Bar, CASan Clemente, CAPleasanton, CAMilpitas, CALodi, CACamarillo, CAAlhambra, CALivermore, CABuena Park, CAUpland, CAPerris, CANapa, CAPalm Desert, CACathedral City, CAYucaipa, CALynwood, CARedondo Beach, CAPittsburg, CANovato, CAChino Hills, CACerritos, CAMonterey Park, CARosemead, CABaldwin Park, CAMontebello, CABellflower, CAPico Rivera, CALa Habra, CAPlacentia, CACypress, CAEncinitas, CAPoway, CAImperial Beach, CALa Mesa, CACoronado, CANational City, CAMonrovia, CAAzusa, CAGlendora, CAClaremont, CALa Verne, CASan Dimas, CAWalnut, CAMontclair, CARedlands, CAColton, CALoma Linda, CAAlameda, CADublin, CAEmeryville, CANewark, CAPiedmont, CAOroville, CAParadise, CABrentwood, CAClayton, CAEl Cerrito, CAHercules, CAMartinez, CAOrinda, CAPinole, CAPleasant Hill, CASan Pablo, CACoalinga, CAFowler, CAKerman, CAReedley, CASanger, CASelma, CAHanford, CADelano, CARidgecrest, CATehachapi, CALemoore, CABrea, CADana Point, CALaguna Beach, CASantee, CASolana Beach, CAVernon, CASignal Hill, CACulver City, CAMenlo Park, CAFoster City, CATustin, CAAliso Viejo, CANorco, CAEastvale, CALos Gatos, CAGilroy, CASaratoga, CACampbell, CAHawthorne, CAGardena, CAHermosa Beach, CAManhattan Beach, CAEl Segundo, CACudahy, CAMaywood, CATemple City, CADuarte, CAPalos Verdes Estates, CARolling Hills Estates, CARolling Hills, CALomita, CABradbury, CAIndustry, CALa Puente, CAHawaiian Gardens, CAAtherton, CABelmont, CAHalf Moon Bay, CAMillbrae, CABrisbane, CABurlingame, CASeal Beach, CALos Alamitos, CA
4.8
Based on 6+ verified customer reviews across California

What California homeowners say about slab leak detection

★★★★★

“The floor in our hallway had a warm spot for weeks. They found the slab leak in under an hour with the listening equipment and marked a tiny area instead of tearing up the whole hallway. Huge relief.”

MTMarcus T. · Los Angeles, CA
★★★★★

“Our water bill jumped for two months straight and we couldn't find why. Turned out it was a slow leak behind the water heater. Professional, on time, and explained everything on the spot.”

PRPriya R. · Los Angeles, CA
★★★★★

“Salt air had corroded a fitting outside near the meter box. They traced it with the acoustic equipment without digging up my whole side yard first. Appreciated the straightforward report.”

DKDaniel K. · San Diego, CA
★★★★☆

“Good experience overall, technician was knowledgeable and thorough. Took a little longer than expected but they were clearly being careful about pinpointing the exact spot before marking it.”

AMAngela M. · San Diego, CA
★★★★★

“Old Victorian with plaster walls everywhere, so I was dreading this. They used thermal imaging and found the leak behind one wall panel instead of opening up the whole room. Saved us a big repair bill.”

CBChris B. · San Francisco, CA
★★★★★

“Ground near our garage had been soft for a while. Turned out to be the main line. They marked the exact dig spot and our plumber only had to open a two-foot section instead of the whole path.”

WLWei L. · San Francisco, CA

Slab Leak Detection FAQs

How do you find a slab leak without jackhammering my whole floor?Toggle answer
We use acoustic leak detection equipment that amplifies the sound of water escaping under pressure, paired with infrared thermal imaging to spot the resulting heat or moisture signature through the flooring. This lets us mark a precise, small target area instead of guessing.
Will a slab leak get worse if I wait?Toggle answer
Yes. Water under a slab erodes soil and base material, which can lead to further settling, mold growth, and floor or wall cracking the longer it runs. Most slab leaks that go undetected continue to worsen rather than resolve on their own.
Can a slab leak be repaired without repiping the whole house?Toggle answer
In many cases a localized spot repair or a short reroute above the slab is possible once the leak is precisely located. The right option depends on your home's plumbing layout, pipe material, and the age of the system, which our technician can walk you through after the inspection.

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Need slab leak detection in California?

Same-day appointments available. Call now or request an inspection online.

Call (844) 581-0720 Request Inspection