A slab leak happens when a water supply pipe running through or below a concrete floor develops a hole or a failed joint. Fixing it starts with pinpointing the spot, then a plumber either opens the concrete at that point or runs new pipe around it and retires the buried section. Call the number on this page to be connected with a local plumber in San Diego.
Where slab leaks show up in San Diego
Construction style matters here. Many older neighborhoods have raised foundations with crawl spaces, where a leaking pipe is visible and reachable. Newer tracts are more often slab-on-grade, so supply lines are buried in or under the concrete and a small leak can run quietly for a long time. Abrasion against rock and concrete, joints stressed during the pour, and corrosion in aging copper are typical causes. San Diego's median home was built around 1979, so plenty of slabs have pipe that has been in service for decades.
Warning signs
- A warm patch of floor, often along the path of a hot water line
- A water heater that keeps firing when nobody is running hot water
- A faint hiss or trickle with every fixture off
- Baseboards that stay damp, swelling laminate or a mildew odor
- A water bill that climbs while your habits stay the same
A quick meter test
Turn off the irrigation controller, the ice maker and all faucets, then look at the leak indicator on your meter. If it moves, close the main shutoff at the house. A dial that stops points to a leak inside the home, possibly under the slab. A dial that keeps moving points to the buried line between the meter and the house, which the City says the property owner maintains.
Finding the exact spot
Expect the plumber to isolate and pressure-test hot and cold piping separately, then use acoustic listening gear on the floor surface. Thermal imaging helps trace a leaking hot line. The tighter the locate, the smaller the hole in your floor.
Repair options compared
| Method | Best for | What to expect |
|---|---|---|
| Direct repair through the floor | A single leak in otherwise healthy pipe | Flooring and concrete are cut out and restored |
| Reroute overhead or in walls | Buried pipe likely to fail again | Wall or ceiling patches replace floor work |
| Partial or whole-house repipe | Several leaks or aging pipe everywhere | Bigger project that retires old piping |
What drives the price
Locating time, the flooring on top, the repair method, and drying or floor replacement afterward all add up. Ask whether a City Plumbing/Gas Permit applies and who will obtain it.
Slab Leak Repair questions from San Diego homeowners
Do San Diego homes on raised foundations get slab leaks?
Should I reroute or open the floor?
Is a warm floor always a slab leak?
Who is responsible for a leak between the meter and the house?
Related plumbing services in San Diego
Helpful guides
Slab Leak Repair in nearby cities and towns
San Diego County
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