The red clay around here is beautiful in a pasture and hard on everything buried in it. East Texas sits on soil that takes on water and swells, then dries out in August and pulls back and cracks. You can see the cracks open up in a yard in Kilgore or out toward Henderson by the middle of a dry summer, wide enough to lose a screwdriver in. That same ground is what your slab is resting on, and it is what the water lines under your slab are resting in.
A slab leak is a leak in one of those lines, underneath the concrete, where you cannot see it and cannot reach it without a plan. They are common here, and the reason is mostly the dirt.
Why the clay is rough on under-slab copper
Most houses built here from the sixties on have copper water lines run in or under the slab. Copper is good pipe. What it does not enjoy is being moved.
When the clay swells after a wet stretch it pushes up on the slab, unevenly, because the moisture is never the same everywhere under a house. The side that gets the roof runoff swells first. The side under the driveway or shaded by a big oak stays drier. Then the summer comes and it all shrinks back, and the parts that swelled the most fall the farthest. Your slab flexes a little through all of that, and so does everything cast into it.
Copper that is rubbing against concrete or against a rock every time the ground breathes wears a thin spot, and thin spots turn into pinholes. Hot water lines go first as a rule, because heat makes the copper expand and contract on its own schedule on top of everything the dirt is doing, and because a hot line runs at higher pressure when the heater fires. That is why the classic first sign of a slab leak here is a warm patch on the floor.
Signs that show up before the water does
Nobody discovers a slab leak because water came up through the concrete. By the time that happens it has been going a long while. What you notice first is smaller.
A warm spot on the floor is the one to take seriously. Walk barefoot across a tile or vinyl floor and if there is a patch that is noticeably warmer than the floor around it, there is hot water running under it that should not be. On carpet you will feel it less, so check the bathrooms and the kitchen where the floor is hard.
Then there is sound. A slab leak makes noise, and the best time to hear it is late at night with the house quiet and everything shut off. Stand in the middle of the room and listen for a faint hiss or a running-water sound with no fixture on. Plenty of people find their leak that way before we ever get there.
A water bill that jumped with no change in how the house is being used is worth acting on the same week. So is a water heater that runs more than it used to, or a spot on the foundation or the exterior brick that stays damp when the rest of it is dry. Cracks that suddenly appear in interior drywall or in the slab itself can point at it too, because a leak washing soil out from under one part of the foundation lets that part settle.
The meter test, step by step
You can get a strong answer on this yourself in about twenty minutes, and it costs nothing. Do it before you call anybody.
Start by shutting off every water-using thing in the house. Faucets off, no laundry, no dishwasher, no ice maker running, and turn the ice maker off at the switch because it will cycle on you in the middle of the test. If you have irrigation, make sure the controller is not going to start a zone.
Now go find your water meter, usually in a box near the curb. Pull the lid and look at the face. Most meters have a small triangular or star-shaped dial called the leak indicator, separate from the big sweep hand. With everything in the house off, that little dial should not be turning at all. If it is creeping, water is moving somewhere.
If your meter does not have a leak indicator, write down the exact reading, all the digits, and leave everything off for two hours. Come back and read it again. Any change at all means water went somewhere with nothing turned on.
The next step tells you whether it is under the slab or somewhere else. Find your main shutoff, the one where the water enters the house, and close it. Then read the meter again the same way. If the dial stops or the reading holds steady with the main closed, the leak is inside the house side of the system. If it keeps moving with the house shut off, the leak is between the meter and that shutoff, out in the yard line. Both are worth fixing. They are different jobs.
Write down what you saw. When you call us, that information saves real time and money, because we start from what you already proved instead of proving it again.
How we find one without tearing up the floor
Knowing there is a leak and knowing where it is are two different problems, and the second one is where the money is. A wrong guess means a hole in your floor over nothing.
We start with acoustic gear. Water escaping a pressurized line under concrete makes a specific sound, and a ground microphone with enough amplification picks it up through the slab. We work a grid across the floor and listen for where it gets loudest. On a quiet house with a decent-size leak that alone can put us within a foot or two.
When the sound is muddy, and it can be under thick slab or with a small weep, we pressurize the system with tracer gas. The line gets isolated and charged, the gas finds its way up through the concrete at the leak, and a detector at the surface tells us where it surfaced. It is precise and it does not care how noisy the house is.
Thermal imaging earns its keep on hot water leaks, since a hot line spilling under a slab warms the concrete above it in a pattern a camera reads plainly. And we isolate sections of the system as we go, closing off branches one at a time and watching the meter, so we can rule out half the house before we ever kneel down with a microphone.
Most of the time it is a combination of those, cross-checked, until we can mark an X on the floor and stand behind it. That is what our leak detection work is for. We do not open concrete until we are sure, and if we are not sure we say so rather than guessing on your dime.
Spot repair or reroute, and how to pick
Once it is located there are two honest paths, and which one is right depends on the pipe, not on which one we would rather do.
A spot repair means opening the slab at the leak, cutting out the bad piece, putting in new, and closing it back up. When it is a single failure in a line that is otherwise in good shape, this is usually the right call. It is the smaller job. The tradeoff is that you are cutting concrete inside the house, which means dust, noise, and floor covering that has to come up and go back down.
A reroute abandons the line under the slab and runs a new one overhead through the attic and down the walls to the fixtures. Nothing gets cut in the floor at all. It costs more up front on most houses and it means drywall patches, but the new line is accessible forever after. If anything ever happens to it, somebody fixes it with a ladder instead of a jackhammer.
Here is how we sort it. One leak, first one this house has had, copper in decent condition everywhere we can inspect it, we repair the spot and you get on with your life. Second leak within a couple of years, or a house where the pinholes are showing up in different places, and we are going to recommend rerouting that line or repiping the section, because the dirt is not going to stop moving and that pipe is not going to get thicker. Chasing individual leaks under a slab on a failing line is the most expensive way to do it, one hole at a time. Our leak repair page covers how each route goes, and if the answer turns out to be bigger than one line, repiping is where that conversation heads.
Stephen and Gicel started Odyssey in 2022 because they kept running into people who had been sold the big version of a small job, or the small version of a big one. Being straight about which one you have got is the whole business. Odyssey is Veteran Owned and Operated, and that is the standard we hold the work to.
Keeping the ground under your house steadier
You cannot change the soil, but you can even out how wet it gets, and that is most of the battle. Big swings are what move a foundation. Steady moisture barely moves it at all.
Get your gutters running and get the downspouts discharging well away from the house, not at the corner of the slab. Dumping a roof’s worth of rain right at the foundation soaks that one strip of clay hard while the rest of the perimeter stays dry, and that is the exact uneven swelling that stresses pipe. In a long dry summer, running a soaker hose a couple of feet out from the foundation for a while every few days sounds strange but it works, because it keeps the clay from shrinking away and dropping that side of the house. Keep the sprinkler heads aimed where you think they are aimed. And a big tree close to the house pulls a lot of moisture out of the ground on its own side.
Questions we get about slab leaks
Q. Will a slab leak damage my foundation? It can, given time. Water running under a slab carries fine soil away with it, and once there is a void under one section that section settles. That is the mechanism behind the cracks that show up in drywall or brick after a leak has been going a while. It is also why finding it early matters more than most people realize.
Q. Does homeowner insurance cover it? Policies differ, so read yours or call your agent. Broadly, many policies help with the cost of accessing the leak and repairing the resulting water damage while excluding the pipe itself. Whatever the answer, document everything from the start, and we will give you a written scope you can hand to an adjuster.
Q. How long does the repair take? A located spot repair under a slab is often a one-day job once we are open, plus time for the floor to go back. A reroute on an average house usually runs two to three days. Finding the leak is its own visit and normally takes a couple of hours.
Q. My floor is warm but my bill looks normal. Is it still a leak? Maybe, and it is worth checking. A small weep may not move a monthly bill much yet while still being plenty to feel through tile. Run the meter test above. If the leak indicator creeps with everything off, you have your answer regardless of what the bill says.
Q. Can I just leave it if it is small? We would not. A slab leak does not heal and the pressure behind it never lets up, so it gets bigger and it keeps washing soil out the whole time. What is a plumbing repair this month can turn into a foundation conversation next year.
Think you have one?
Run the meter test tonight. If that little dial is moving with the whole house shut down, get us out there and let us pinpoint it before anybody breaks concrete. We cover Kilgore, Longview, Tyler, Marshall, and Henderson, and we will show you exactly what we found and what it will take to fix, with a real price before we start.
Phone is 903-570-3051, or send us the details and tell us what the floor is doing. Recent jobs are up on the gallery if you want to see how we leave a place when we are done.