A slab leak is a break in a water line running beneath your home’s concrete foundation. Because you can’t see it, it can waste water and damage your home for months before you notice. Jon Wayne’s licensed plumbers use electronic leak detection to find slab leaks without tearing up your floors, then recommend the least invasive repair for your home. Same-day service, upfront pricing, and a $29 service call.
Signs You May Have a Slab Leak
- Your water bill jumps without a change in water use
- You hear running water when every fixture is off
- Warm or hot spots on the floor, especially on tile
- Damp carpet, warped wood floors, or mildew smells
- New cracks in walls, floors, or the foundation
- Low water pressure throughout the house
- Your water meter keeps moving when nothing is running
If you notice any of these, shut off your main water valve if you can and call us. The sooner a slab leak is found, the less damage it causes.
Why Slab Leaks Are Common in San Antonio
Most San Antonio homes are built on concrete slab foundations, and much of the area sits on expansive clay soil. That soil swells when it is wet and shrinks when it dries out. Every cycle shifts the foundation slightly, putting stress on the water lines underneath. Long dry spells followed by heavy rain, like the wetter winter forecasters expect with this year’s El Niño, make that movement worse.
San Antonio’s hard water adds to the problem. Mineral content and water chemistry can wear down copper pipes over time, and older homes often have lines that are reaching the end of their service life.
How We Find a Slab Leak
Our plumbers locate the leak before we open anything, so there is no guesswork and no unnecessary damage. Depending on your home, we use:
- Pressure testing to confirm a leak and isolate which line is affected
- Electronic acoustic detection to listen for the sound of escaping water through the slab
- Thermal imaging to spot hot water leaks by the heat they give off
- Line location tools to trace exactly where the pipe runs under your floor
For leaks behind walls or in other parts of your plumbing, see our leak detection services.



