24/7 Slab Leak Detection & Repair Services
Slab leaks are sneaky — water is escaping under your concrete foundation right now, but the visible damage may be 24 hours away. A-Star Restoration dispatches licensed plumbers with thermal imaging and acoustic detection equipment to locate the leak without breaking the slab — and coordinates restoration crews when finished spaces have already taken on water. 24 hours a day, nationwide.
Signs You May Have a Slab Leak
Early warning indicators — two or more together usually confirms the problem.
Warm Spots on the Floor
Hot-water supply lines leaking under the slab transfer heat upward through the concrete. A warm patch on tile, hardwood or laminate with no obvious heat source is one of the most reliable slab-leak indicators.
Unexplained Water Bill Increase
A leak running 24/7 even slowly adds up fast — many slab leaks add 30-50% to the monthly bill before any visible water appears. Compare your last 3 bills against the prior year.
Sound of Running Water
With every faucet closed and every appliance off, you can hear the supply line running under the floor. Confirm by watching the water meter dial.
Low Water Pressure
A pinhole leak under the slab steals pressure from the rest of the house. If pressure dropped recently with no obvious cause, slab leak should be on the short-list of suspects.
Wet Flooring or Baseboards
Moisture appearing at the edge of a wall or under a baseboard without a visible upstream source typically means water is migrating up from under the slab via capillary action.
Cracks in Flooring or Foundation
Water under the slab erodes the soil beneath, causing localized settlement and cracking. Hairline cracks in tile grout or new cracks in foundation walls are warning signs.
Mildew Smell
Subfloor and slab moisture creates the perfect microbial growth environment. A musty smell with no visible water source is a slab-leak red flag.
Water Pooling Near the Foundation
Slab leaks can migrate laterally and emerge outside the house near the foundation perimeter — particularly noticeable when no rain or irrigation could explain it.
What To Do Right Now
Do these in order — the first 10-15 minutes matter most.
- Turn off the water at the main shut-off only if the leak appears severe — small slab leaks can be safely left running until a plumber arrives.
- Don't open the flooring or concrete yourself. Slab penetration without thermal/acoustic confirmation wastes time and money.
- Move furniture, rugs and stored items away from wet floor areas. Items lifted in the first hour can usually be saved.
- Take photos of every visible sign — warm spots, wet baseboards, cracks, water staining. Insurance evidence.
- Call slab leak detection for thermal imaging + acoustic location and a repair-vs-reroute scope.
- Call restoration in parallel if flooring, drywall or baseboards are wet. Mitigation within 24 hours is decisive.
Plumbing vs Water Damage Restoration
Two specialized teams — one decision.
Call Emergency Plumbing If:
- Leak source is active under the slab
- Hot spots on the floor or running-water sound
- Water bill spike or unexplained pressure drop
- Foundation crack with visible moisture
- You need detection + repair scope
Call Water Damage Restoration If:
- Flooring is already wet — tile, hardwood, carpet
- Walls or baseboards show moisture
- Mildew or musty odor present
- Water has spread into finished living spaces
- Insurance documentation needed
Common Causes Of Slab Leak Detection & Repair
8 failure modes drive most of these emergencies.
Pipe Corrosion
Pipe corrosion happens when copper, galvanized steel, or fittings deteriorate from aggressive water chemistry (low pH, high chlorides), stray electrical current, dissimilar-metal contact without a dielectric union, or constant moisture against lines under the slab. Homeowners often notice pinhole leaks, rusty or blue-green staining, metallic-tasting water, reduced pressure, warm spots on floors, or the sound of water running when fixtures are off—classic slab leak clues. The response usually includes locating the leak, isolating affected sections, and repairing with proper couplings or rerouting with PEX, then drying and documenting damage for insurance if applicable.
Foundation Movement
Foundation movement can shift or settle the concrete slab, putting stress on rigid plumbing runs and fittings. Copper and CPVC lines may crack, and even PEX can pull at manifolds or stub-outs, leading to a slab leak. Homeowners often notice warm spots on the floor, new cracks in tile or drywall, damp carpet edges, musty odors, or a sudden jump in the water bill and reduced pressure. Typical response includes acoustic or thermal leak detection, isolating the damaged section, then a spot repair, reroute, or full repipe if multiple stress points are found.
High Water Pressure
High water pressure (often above 80 psi) puts constant stress on supply lines and joints, especially at copper, PEX, or CPVC fittings, shutoff valves, and water heater connections. Over time it can weaken soldered joints, crack CPVC, trigger a water heater T&P valve to drip, or accelerate pinhole leaks that become a slab leak. Homeowners may notice banging pipes, a running meter with fixtures off, frequent leaks, or short-lived appliances and fill valves. Typical response includes verifying pressure with a gauge, checking the PRV, adding or servicing a thermal expansion tank, and repairing or rerouting the failed line.
Poor Pipe Installation
Poor pipe installation can leave copper, PEX, or CPVC under constant stress from tight bends, improper support, bad solder joints, or missing dielectric unions, leading to pinholes, splits, or a slab leak at a fitting. Homeowners often notice unexplained high water bills, warm spots on floors, damp carpet, musty odor, low pressure, or the sound of water running when fixtures are off. Typical response includes leak detection, isolating the line, and a targeted repair or reroute with code-correct fittings, followed by pressure testing and drying if water reached the slab or walls.
Aging Copper Lines
Aging copper supply lines can fail as minerals and sediment cause internal pitting, and years of thermal expansion/contraction or stray electrical current accelerate corrosion—especially at elbows, solder joints, and near dielectric unions. Homeowners often notice unexplained spikes in the water bill, warm spots on the slab, musty odors, low pressure, or the sound of running water when fixtures are off. A slab leak response typically starts with non-invasive detection, then isolating the damaged run and either spot-repairing the copper or rerouting with PEX (or approved CPVC) to bypass the slab, followed by drying and documentation for insurance.
Soil Expansion & Contraction
Soil under a foundation naturally swells when it absorbs moisture and shrinks during dry spells. That movement can stress slab-embedded copper, PEX, or CPVC runs, loosen fittings, and create a hidden slab leak. Homeowners may notice warm spots on floors, unexplained spikes in the water bill, reduced pressure, damp carpet or tile, and new cracks in drywall or flooring. The typical response is leak detection (acoustic, thermal, or tracer gas), isolating the failed section, and repairing it via spot access or rerouting a new line through walls/attic, then drying affected materials as needed.
Abrasion Against Concrete
In slab-on-grade homes, water lines can rub against rough concrete or rebar as they expand and contract with temperature and pressure changes. Over time, this abrasion can wear through copper or damage sleeved PEX, leading to a slab leak. Homeowners often notice warm spots on the floor, damp carpet or tile grout, unexplained spikes in the water bill, low pressure, or the sound of running water when fixtures are off. The typical response is leak detection, then a localized slab access and line repair or a reroute through walls or the attic, plus drying if moisture has spread.
Freeze or Ground Movement Stress
Freeze events and ground movement can stress rigid plumbing under or through the slab, especially older copper runs, solder joints, and poorly supported CPVC, leading to a slab leak or pinhole break. Homeowners often notice a sudden spike in the water bill, the sound of running water when fixtures are off, warm spots on the floor, cracks in tile, or damp carpet and baseboards. Response typically starts with acoustic/thermal leak detection and pressure testing, then targeted access for a spot repair or reroute using PEX with proper sleeving and isolation. After the line is stabilized, drying and dehumidification may be needed to protect flooring and prevent microbial growth.
Slab Leak Detection & Repair Process
From the moment you call to a fully resolved fix.
- Immediate dispatch. Live dispatcher confirms symptoms, home age and damage status. Plumber routed within minutes; restoration in parallel if water has spread.
- Non-invasive detection. Thermal imaging cameras + acoustic listening equipment locate the leak through the slab — no demolition until the leak is confirmed within inches.
- Pressure isolation testing. Hot and cold supply lines tested separately to confirm which line is leaking and to estimate flow rate.
- Repair scope decision. Three options: spot repair through the slab, re-route the failed line through walls/ceiling, or full re-pipe if multiple sections are at-risk.
- Execution. Concrete cutting and patching, or pipe re-routing through accessible chases. System re-pressurized and leak-down tested before crew leaves.
- Restoration handoff. When water has reached finished spaces: written scope, moisture readings and photo log handed off for a single insurance claim.
Slab Leak Detection & Repair Sub-Services
Specialized scopes for the most common scenarios.
Thermal Imaging Detection
FLIR thermal cameras visualize hot-water leak signatures through concrete. Non-invasive scan that pinpoints the leak location within inches before any demolition.
→ Thermal Imaging DetectionAcoustic Leak Detection
Ground-microphone acoustic equipment isolates the sound of pressurized water escaping under the slab. Used with thermal imaging for redundant confirmation.
→ Acoustic Leak DetectionSlab Leak Isolation
Pressure testing of hot and cold supply lines independently to confirm which line is leaking and what the flow rate is — critical input for repair-vs-reroute decision.
→ Slab Leak IsolationPipe Re-Routing
Re-routing the failed supply line through walls or attic instead of cutting the slab. Often lower-cost when one section is failing and the rest of the system is sound.
→ Pipe Re-RoutingConcrete Cut & Repair
Targeted concrete saw-cutting, leak repair and slab patching when re-routing isn't viable. Patched slab returns to load-bearing capacity within 24-72 hours.
→ Concrete Cut & RepairPost-Repair Water Damage Mitigation
IICRC-certified water extraction, structural drying, dehumidification and reconstruction after slab leak water has reached finished spaces.
→ Post-Repair Water Damage MitigationCities We Serve for Slab Leak Detection & Repair
Active 24/7 dispatch in the metros below — expanding across the U.S.
Austin Slab Leak Detection & Repair
Austin slab leak detection — Westlake Hills, Tarrytown, Hyde Park, Mueller. Limestone soil + freeze cycles drive failures.
→ Austin dispatchDallas Slab Leak Detection & Repair
24/7 slab leak detection in Dallas — thermal imaging, acoustic equipment, controlled repair across DFW's expansive-clay soil neighborhoods.
→ Dallas dispatchFort Worth Slab Leak Detection & Repair
Fort Worth slab leak service — Tanglewood, Westover Hills, Mistletoe Heights, Crestwood, Rivercrest, Arlington Heights.
→ Fort Worth dispatchHouston Slab Leak Detection & Repair
Houston slab leak detection — Memorial, The Heights, Katy, Sugar Land, Pearland. Soil expansion is the local #1 cause.
→ Houston dispatchSan Antonio Slab Leak Detection & Repair
San Antonio slab leak detection — Alamo Heights, Stone Oak, Terrell Hills, Monte Vista, Shavano Park.
→ San Antonio dispatchSlab Leak Detection & Repair Cost
Slab leak detection (thermal + acoustic) typically ranges $300–$700. Spot repair through the slab ranges $1,500–$4,000. Pipe re-routing ranges $1,200–$3,500 per line. Full re-pipe of a typical 3-bedroom home ranges $4,500–$9,000+.
Insurance & Slab Leak Detection & Repair
Most homeowner's policies cover sudden and accidental water damage from a slab leak, but coverage of the slab repair itself varies dramatically by carrier. State Farm, Allstate, USAA, Farmers and Liberty Mutual all handle slab leaks differently — some include 'tear-out and access coverage', others don't.
Frequently Asked Questions — Slab Leak Detection & Repair
- How do I know if I have a slab leak?
- Common slab leak signs include a sudden spike in your water bill, the sound of running water when fixtures are off, warm or damp spots on floors, unexplained cracks in tile or slab, musty odors, or low water pressure. You may also see water pooling at the foundation or notice hot water runs out faster (hot-line leak). If moisture is left in place, mold can start in 24–48 hours. Shut off the main valve and check whether the water meter still moves—if it does, call for leak detection and document damage for insurance (State Farm, Allstate, USAA, Farmers, Liberty Mutual).
- Is a slab leak an emergency?
- Yes—treat a slab leak as an emergency because it can undermine your foundation, cause hidden water damage, and drive up your water bill fast. If you notice warm spots on the floor, damp carpet, musty odor, cracks, or the water meter running when all fixtures are off, shut off the main valve and call for 24/7 detection and repair immediately. Wet building materials can start supporting mold growth within 24–48 hours, and Category 2–3 contamination is possible if the leak involves drain lines. We can also coordinate IICRC-certified drying and help document losses for insurers like State Farm, Allstate, USAA, Farmers, or Liberty Mutual.
- Can a slab leak damage my foundation?
- Yes. A slab leak can wash out or soften the soil under your concrete, causing settling, cracks, uneven floors, and in some cases heaving from constant moisture. It can also wick water into walls and flooring, and mold can start in 24–48 hours if materials stay damp. Shut off the main water, avoid running fixtures, and schedule leak detection and repair immediately; an IICRC-certified restoration crew can also dry and dehumidify affected areas to prevent secondary damage. If you’re filing a claim, document photos and notes—carriers like State Farm, Allstate, USAA, Farmers, and Liberty Mutual may require prompt mitigation.
- How much does slab leak detection cost?
- Slab leak detection typically runs $250–$750 nationwide, depending on whether the plumber uses acoustic listening, thermal imaging, or a pressure test, and how hard the pipe is to access. If the leak is actively soaking the slab, don’t wait—water can start wicking into drywall and flooring immediately, and mold can begin within 24–48 hours. Many homeowners’ policies from State Farm, Allstate, USAA, Farmers, or Liberty Mutual may cover the resulting water damage (not always the pipe repair), especially when documented promptly by an IICRC-certified restoration team.
- Does homeowners insurance cover slab leaks?
- Sometimes. Many homeowners policies (including State Farm, Allstate, USAA, Farmers, and Liberty Mutual) may cover the sudden water damage from a slab leak, but often won’t cover the cost to access and repair the broken pipe itself (and long-term seepage can be excluded). Shut off the main, document photos/video, and report the claim right away—waiting can trigger “late notice” issues and mold can start in 24–48 hours. Ask your adjuster about “tear-out” coverage and use an IICRC-certified water damage firm for drying documentation.
- Should I repair, reroute or repipe a slab leak?
- It depends on the leak location, pipe condition, and how long water has been escaping. A spot repair can work when it’s a single, accessible pinhole and the rest of the line tests sound; rerouting is often smarter when the leak is under a high-risk area or the slab would require major demolition; repiping is usually best when there are multiple leaks, aging copper/galvanized lines, or widespread corrosion. Don’t wait—wet materials can support mold growth in 24–48 hours, so shut off water and document damage for State Farm, Allstate, USAA, Farmers, or Liberty Mutual. Use IICRC-certified drying/restoration if floors or walls are wet.
- Can a slab leak cause mold?
- Yes. A slab leak can keep drywall, baseboards, flooring, and the concrete itself damp, creating hidden moisture that mold can start in as little as 24–48 hours. Warning signs include musty odor, warped floors, warm spots on tile, peeling paint, or rising humidity. Shut off the main water, avoid running fans into wall cavities, and call for slab leak detection plus drying; IICRC-certified water damage pros can map moisture, remove wet materials, and run dehumidifiers until readings are dry. If you’re filing a claim with State Farm, Allstate, USAA, Farmers, or Liberty Mutual, document photos and mitigation steps right away.