Slab Leak Signs in Fort Worth and How to Check
Warm floor spots, a jump in the water bill, or a meter that moves with everything off: how to check for a slab leak in a Fort Worth home.
Signs of a slab leak in a Fort Worth home: a warm patch on the floor, a water bill that jumps, running-water sound with everything off, and a meter that keeps moving. Confirm with a meter test, then call a plumber for leak detection before a foundation company.
What are the signs of a slab leak?
Most slab leaks show up in the water system before they show on the floor. Start with the bill. A jump from one month to the next, with no houseguests, no new irrigation and no filled pool, is the earliest sign most people get. Then listen. In a quiet house at night, put your ear near the floor and the walls. A hiss or trickle that doesn't match any fixture is worth writing down.
The floor gives clues later. A warm spot underfoot that stays warm even when the heat is off can mean a hot-water line is leaking beneath the slab. Damp carpet, flooring that curls at the edges, baseboards that swell, and a musty smell with no visible source all point the same way.
- Water bill climbing with no change in how you use water
- A warm or hot patch on the floor
- The sound of running water when every fixture is off
- A meter dial that moves when nothing is on
- New cracks in tile, drywall or the slab itself, which are the weakest clue of the five
How do I run the meter test at home?
Shut off every faucet, the dishwasher, the washing machine and the icemaker, and make sure nobody flushes a toilet during the test. Then go to the meter, usually in a box near the curb, and lift the lid carefully. Look for the small leak indicator, often a little triangle or dial, that spins when any water at all is moving. If it turns with the whole house idle, water is going somewhere.
Next, close the main shutoff valve at the house and look again. If the indicator stops, the leak is on the house side of that valve. If it keeps moving, the loss is between the meter and the house, which is a different repair. Before you decide it's a slab leak, rule out the cheap suspects: a toilet flapper that leaks silently into the bowl can move a meter all by itself. A few drops of food coloring in the tank will show it. If the color reaches the bowl without a flush, fix that first and test again.
Why does Fort Worth's clay soil make slab leaks more likely?
North Texas sits on expansive clay. It swells when it's wet and shrinks as it dries, and a slab foundation rides on top of that movement. The supply and drain lines under the slab are rigid and anchored at both ends, so when the ground shifts, the strain lands on joints and bends. A dry spell followed by heavy rain is a hard cycle for them.
It also works in reverse. A leak under the slab soaks the clay, the clay swells, and part of the slab can lift. So a crack in the floor is sometimes the result of a leak instead of the cause. That's why cracks are the least trustworthy sign on the list. Cracks are common on clay for plenty of reasons, and one on its own doesn't prove a leak.
Should I call a plumber or a foundation company first?
Call a plumber first. Leak detection answers whether water is escaping. A foundation company answers whether the slab has moved. If a leak is the cause and you level the slab first, you've paid to fix a symptom, and the next wet season can move it again.
When the plumber finds the leak, ask where exactly the pipe runs. Plenty of leaks that look like slab leaks are in a wall or attic. Ask what the options are for that line, such as repairing it where it sits or rerouting it overhead, and ask for the findings in writing. A written detection report is useful later if foundation work turns out to be needed or if you file an insurance claim.
What should I do while I wait for a plumber?
If the meter is spinning fast or water is surfacing, close the main shutoff. Move belongings off wet floors, and don't drill, chip or dig into the slab yourself. You can easily hit another line, and you'll make the plumber's job harder.
Take dated photos of the meter reading, the recent bills and any damp or warm areas. Then read your homeowner's policy, or call your insurer, and ask specifically about water that escapes from pipes under a slab, and whether the policy pays for locating the leak or only for the damage it causes. Policies differ on this, and the answer decides how you document things now.