Emergency Slab Leak Repair in Laguna Hills, CA
A slab leak is a leak in a pipe under or inside your concrete floor. Call the 24/7 line when you notice a warm spot, a wet floor or the sound of running water, and we pinpoint the leak before anything is cut.
- 24/7 emergency line.
- Clear price before work starts.
- Licensed and insured.
Slab leak: what to do while you wait
A slab leak can run for weeks unnoticed, but a sudden warm floor or water at a baseboard needs fast action, and our 24/7 line is open for that call. Shut off the main water valve and keep people away from wet electrical areas.
Same-day visits are offered when a crew is free, and the sooner the water is off the less damage reaches flooring and framing.
- Close the main water valve to stop the leak.
- Do not walk barefoot on a floor that feels hot, since a hot water line may be leaking.
- Remove rugs and furniture from the wet area so the floor can dry.
- Write down when the bill rose or the sound began and share it with the technician.
What a slab leak is
Many homes carry water pipes beneath or inside the concrete foundation. When one of those pipes fails, the water has nowhere to go but up through the slab or out to the soil below.
A leak under a slab is not visible, so the first signs are indirect. They can be a spinning meter, a warm patch of floor, damp flooring or the faint sound of running water when everything is off.
Signs of a slab leak
- A meter that moves while every fixture is off.
- A warm or hot spot on a tile or concrete floor.
- Damp carpet, lifting laminate or cracked tile.
- A hissing or running sound from the floor.
- A higher water or gas bill with no change in habits.
- Low hot water pressure, which can point to a hot line leak.
How we locate the leak before cutting
We shut the system down in sections to find which line is losing pressure. Electronic listening equipment then picks up the sound of the leak through the concrete, and a locator marks the spot on the floor.
This keeps the opening small. The goal is to cut only where the leak is, not to open a large section of floor to look for it.
Think the leak is under the floor?Call the 24/7 line and we will locate it before anything is cut.
Call (949) 325-3122Repair choices for a slab leak
| Option | What it involves | Trade-off |
|---|---|---|
| Spot repair through the slab | Cut a small opening and replace the damaged section | Fastest for one failed spot, other weak spots remain. |
| Reroute through walls or attic | Abandon the slab line and run new pipe overhead | Avoids further slab leaks, needs more wall and ceiling work. |
| Repipe the affected loop | Replace the whole line that serves the failed section | Higher cost now, fewer repeat repairs. |
| Epoxy lining | Coat the inside of the pipe to seal pinholes | Less demolition, only for some pipe conditions. |
Which fits depends on the age of the pipe and how many leaks it has had. If a line has failed more than once, the repiping page explains the longer fix.
Why leaks form in slab pipes
Copper pipe can develop pinholes from corrosion or from constant contact with concrete. Pressure that runs high, and movement as the ground shifts, add stress to joints and bends. Hard water can speed scale buildup inside pipes.
The El Toro Water District reported hardness of about 236 to 293 mg/L in its 2026 water quality report. Whether that contributes to a specific failure is a question for the technician to judge once the pipe is exposed.
Permits and insurance paperwork
Rerouting or replacing supply pipe is normally permitted work, so confirm the steps with the city's Building & Safety Division at (949) 707-2600. Work follows the California Plumbing Code, which is based on the Uniform Plumbing Code (UPC).
If you plan to file a claim, take photos before work starts and ask us for a written description of the leak location and repair. Your insurer decides what is covered.
Slab Leak Repair questions, answered
Do you handle slab leak emergencies at night or on weekends in Laguna Hills?
Yes. The line is open 24/7. Shut off the main water valve, then call, and we book a visit when a crew is available.
How do you find a slab leak without breaking the floor?
We use pressure tests to find the failing line, then electronic listening equipment to hear the leak through the concrete. A locator marks the spot.
Can I keep using water until the repair?
We recommend shutting off the main valve if water is visible. If the leak is small, the technician can tell you whether it is safe to use water until the visit.
Is rerouting better than repairing through the slab?
It depends on the pipe's condition and how often it has leaked. A single leak in good pipe can be repaired in place. A line with repeated failures is a better candidate for rerouting.
Related plumbing services
Leak Detection
Meter checks, pressure tests and listening gear that find hidden leaks and explain high water bills.
View service
Repiping
Whole house or partial repiping in PEX or copper to end repeat leaks and low pressure.
View service
Burst Pipe Repair
Fast repair for burst supply pipes, with the main shut off and damage kept small.
View serviceThink the leak is under the floor?
Call the 24/7 line and we will locate it before anything is cut.