Most homes in and around Foley are built slab on grade. There is no basement and often no crawlspace, so the water supply and sometimes the drain lines run inside or beneath a poured concrete slab. When one of those buried lines fails, the water has nowhere to go but up and out, and the first signs are a warm patch of floor, a spike in the bill, or the sound of water running with every tap closed.
A slab leak is not a wait and see problem. Water under a slab undermines the fill, works into the flooring above and, in this climate, feeds mold in the space it fills. The work has two clear halves: locate the leak precisely, then choose the repair that fits the pipe, the home and how long you plan to keep it.
Locating the leak before touching the concrete
Opening a slab in the wrong place is the expensive mistake, so the locating step is where the care goes. We isolate the hot and cold sides, pressure test to confirm which line is losing water, then use acoustic and thermal equipment to trace the run and mark the spot. On a hot water slab leak the warm floor is a clue, but the actual break is often a foot or more from where the heat surfaces, which is exactly why guessing fails.
Why hot lines fail first under a slab
The hot water line runs hotter than the concrete around it, expands and contracts with every use, and rubs against the slab or the rebar for years. That is why a large share of slab leaks are on the hot side. It also means a home with an aging hot line under the slab may see a second leak after the first, which is part of the repair conversation, not an upsell.
The three ways to fix it
Once the leak is pinpointed there are three honest options, and the right one depends on the pipe material, the home and your plans for it. We lay them out with the trade offs rather than defaulting to the biggest job.
| Approach | When it fits | Trade off |
|---|---|---|
| Spot repair | One isolated leak, sound pipe elsewhere | Least cost, opens the slab in one place |
| Reroute | Leak in a hard to reach run, rest of the system fine | Abandons the bad run, some wall or ceiling access |
| Repipe | Older pipe with repeat failures likely | Highest cost, ends slab leaks for good |
A spot repair is the smallest job: open the slab at the marked point, cut out the failed section, splice in new pipe and close it back up. A reroute abandons the buried run entirely and sends a new line overhead through walls or the attic, which suits a leak that would be brutal to reach through the floor. A full repipe is the answer when the pipe material has a history of pinholes and fixing one leak just moves the problem down the line.
What tells us a slab leak is likely
- A section of floor that is warm underfoot for no reason
- Hot water that never seems to run out at one fixture but the bill is high
- The sound of water moving under the floor with everything off
- Cracks appearing in flooring or a slab, or doors starting to stick
- Damp or a musty smell coming up through the floor
Because a slab leak is often first spotted as a mystery high bill, the honest first move is frequently our leak detection service to confirm the water is going under the slab at all. If a line has already burst rather than started to weep, that is the emergency end of this work and is handled as burst and broken pipe repair. Either way, the aim is a located leak and a clear choice, not a floor opened on a hunch.
Questions Foley homeowners ask
Will you have to jackhammer my whole floor?
Almost never. A spot repair opens the slab only at the point we have already located, which is usually a small square of flooring. A reroute avoids opening the slab at all by running a new line overhead. The large opening people picture only happens with a full repipe, and even then we discuss it first. Precise locating is what keeps the opening small.
Is a slab leak covered by homeowners insurance in Alabama?
It depends on your policy and what caused it. Many Alabama policies help with the cost of accessing and repairing the resulting water damage, while the pipe repair itself and any wear related cause may not be covered. We do not file claims for you, but we document the located leak and the work clearly so you have what an adjuster asks for. Read your own policy or call your agent for the specifics.
How do I know it is a slab leak and not something else?
The tell tale combination is a high bill with no visible leak, plus a warm floor patch or the sound of running water when everything is off. Those point under the slab. We confirm it with a meter test and pressure isolation before calling it a slab leak, because the fix for a slab leak is very different from a leak behind a wall.
Should I just repipe instead of chasing one leak?
Sometimes, and we will say so honestly. If the buried pipe is a material and age with a known pinhole history, one spot repair often buys a year before the next leak nearby. When that pattern is likely, a reroute or repipe can cost less over time than repeated slab openings. When the pipe is otherwise sound, a spot repair is the sensible call.
Warm floor or a bill that makes no sense?
Call and describe it. We will tell you whether it points under the slab and what locating it involves before anything gets opened.