Water leaks you cannot see cause the most damage — a pinhole leak inside a wall can run for months, and a slab leak under your foundation can cost $2,000 to $6,000+ to repair. Leak detection is a high-value specialty because finding the leak is half the battle. This section covers how pros locate hidden leaks, what slab leak repair involves and costs, and the early warning signs every homeowner should know.
How pros find hidden leaks
Acoustic listening equipment, thermal imaging cameras and pressure testing let specialists pinpoint leaks without tearing open every wall. A proper detection visit ($150–$400) is cheap insurance against exploratory demolition.
Slab leak warning signs
Unexplained spikes in the water bill, warm spots on the floor, the sound of running water when everything is off, and cracks in flooring or walls — any two together warrant a detection call, not a wait-and-see approach.