Slab Leak Detection

How slab leaks happen

Most homes in Houston and Austin sit on poured concrete slabs with copper or PEX water lines running underneath. Over time, soil movement, shifting clay, abrasion against rebar, and chemical reactions between the copper and the soil eat through the pipe wall. The leak starts small, and because the pipe is encased in concrete, the water has nowhere to go except into the foundation and up through the floor.

Warning signs

A slab leak rarely announces itself with a visible pool. What homeowners notice first is usually one of the following:

• A water bill that climbs over two or three months with no change in usage
• A warm or damp spot on a tile or hardwood floor, especially in a room where no water is running
• Hairline cracks in the foundation or in interior walls near the baseboards
• The sound of running water when every fixture is turned off
• Mould or mildew smell in a room that should be dry

Electronic leak detection

Abacus technicians use electronic leak detection equipment that picks up the soundwaves a leaking pipe produces under pressure. The equipment isolates the frequency of water escaping through a fracture from background noise, and the technician maps the leak's position on the slab without cutting into concrete until the exact location is confirmed. The test is non-destructive: the slab stays intact during detection, and only the repair itself involves breaking and patching a section of concrete.

Repair options

Once the leak is located, the repair depends on the pipe's condition and the number of failure points. A single pinhole in an otherwise sound line can be patched by opening a small section of slab, cutting out the damaged length, and replacing it. When the technician finds corrosion along the full run, a reroute through the attic or walls may be more durable than chasing multiple future failures under the slab. Abacus handles both approaches, including tunneling under the foundation when the repair needs to reach a line without cutting the finished floor.

Why detection comes first

Breaking into a slab on a guess is expensive and destructive. If the guess is wrong, the homeowner pays to open and close concrete in the wrong spot. Electronic detection narrows the target to a few square feet, so the repair is scoped correctly before any concrete is broken. Abacus runs the detection as a standalone appointment. If the diagnosis reveals no leak, the homeowner walks away with confirmation and an intact floor.