Slab Leak Repair
Do you actually have a slab leak?
A slab leak is a leak in the plumbing under or within a concrete slab foundation. The phrase sounds alarming, but the first step is the same as any leak: confirm it, find where it actually is, and then weigh the options. It's a repairable problem, not a catastrophe.
Possible symptoms
Signs that can point under the slab
A warm spot on the floor can mean a hot-water line is leaking below. The sound of running water when nothing's on, an unexplained bump in the water bill, or a damp patch with no source can all point the same direction.
None of these alone confirms a slab leak, but together they're reason to investigate before assuming the worst.
How it's approached
Confirm → Locate → Weigh
- 1Symptoms
Possible signs
Warm floors, sounds, or unexplained water use that suggest a leak below the slab.
2DetectionConfirm it's there
Leak detection confirms whether a leak exists and roughly where it sits.
- 3Locating
Pinpoint the spot
Narrow the source to the specific line and location under the slab.
- 4Options
Weigh the repair
Direct access, rerouting, or repiping the affected line, each with trade-offs.
Repair options
Without the fear
A slab leak generally means one of the following. No repair is recommended before detection confirms the leak is real and located.
Direct access repair
Open the slab at the leak to fix the line in place. Targeted, but means accessing the floor above.
Reroute the line
Run a new line around the slab instead of through it. Avoids opening the slab, and is often used for recurrent leaks on one line.
Repiping
When the line under the slab has reached end of life, replacing the whole run may be the lasting fix. See repiping for more.
Confirm it before you worry
If you have a warm floor, an unexplained sound, or a rising water bill, detection can confirm whether it's a slab leak, and where. That's the step that turns anxiety into an actual plan.
