Why slab homes are different
Many Yorba Linda houses sit on a concrete slab poured directly on the ground, with some water lines running beneath or through it. When a buried line fails, the leak is hidden under flooring and concrete, and the water can travel before it shows.
Plumbers generally have three options. They can break through the slab and repair the leak where it is, they can abandon that one line and run a new one through the walls and attic, or they can repipe the whole house so no supply line remains in the slab.
Common slab leak signs
- The sound of running water with every fixture off.
- A warm spot on the floor, which can point to a hot water line.
- Damp carpet, lifting floor tiles or cracks in flooring.
- The water meter moving while nothing is running.
- A water bill that rises with no change in use.
First steps
Shut off the water
Close the main shutoff to stop the leak feeding into the slab.
Check the water heater
If the leak seems to be on the hot side, ask a plumber whether the water heater should be shut off too, following its label instructions.
Protect flooring
Move rugs and furniture off damp areas and photograph everything.
Get it located
Ask a licensed plumber to locate the leak before any concrete is cut.
Three approaches compared
| Approach | What happens | Things to consider |
|---|---|---|
| Direct slab repair | Concrete is opened at the leak and the pipe is fixed | Flooring and concrete must be repaired; other buried pipe stays in service |
| Single-line reroute | The leaking line is capped and replaced overhead | Fewer floor repairs; other slab lines may still fail later |
| Whole-house repipe | All supply lines are replaced through walls and attic | Largest scope; takes supply lines out of the slab entirely |
Questions to ask after a slab leak
- Is this a hot or cold supply line, and where does it run?
- How many other supply lines are under the slab?
- What would a reroute of this one line involve compared with a full repipe?
- Will the abandoned line be capped at both ends?
Common questions
Is a reroute always better than breaking the slab?
Not always. It depends on where the line runs, the flooring, and how much wall and attic access is available. Ask a plumber to explain the trade-offs for your house.
Does rerouting mean breaking walls?
Usually some wall openings are needed to bring the new line down to the fixture. Ask how many and where.
Will a slab leak damage my foundation?
Ongoing water under a slab can cause problems. Stop the water and have the leak addressed promptly; for structural concerns, ask a qualified professional.
General information for Yorba Linda, not a quote or professional advice. In an emergency, call 911.