How do you locate a water leak under a concrete slab?

Answer:
Acoustic ultrasound, trace gas detection and thermal imaging can all be used to find slab leaks. For larger leaks or thicker concrete, Ground penetrating radar, and electronic correlation technology can be used. Or, of course, you can just start making holes, and stick your head under the ground to listen for the leaks...
First answer by United Leak Detection. Last edit by United Leak Detection. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 1 [recommend question].