Slab leak detection and repair

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Plenty of post-1950s homes in the valley sit on slab-on-grade construction, which puts the water lines under the concrete. When one of those lines fails, you get a slab leak: water escaping where you can't see it, and often can't hear it either.

How do I know I have one?

• Warm spots on the floor, usually a hot-water line
• The meter moves with every tap off
• Water bill jumped for no reason
• New cracks in floors or the bottom of walls, or a musty smell that won't quit
• The sound of running water when the house is silent

What does detection cost?

Detection gets quoted per job, depending on the house and the equipment it takes. That money buys certainty about where the leak is, which is what keeps the repair small instead of a guessing game with a jackhammer.

What are the repair options?

Two, usually. A spot repair opens the slab at the exact locate point and fixes the pipe. A reroute abandons the failed under-slab run and re-plumbs it through walls or the attic. Reroutes cost more up front but leave nothing under the slab to leak again. Which one makes sense depends on the pipe's age and how many leaks you've already had; a pro who's found the leak can tell you honestly.