A slab leak in Lewisville is a water supply line leaking below a concrete floor, and the first step is telling whether it's on the hot side or the cold side. A plumber tests each one, pins down the location and repairs it through the slab or reroutes the line above the floor. Call the number on this page to be connected with a local plumber in Lewisville.
Lewisville conditions
Lewisville's housing dates mostly from the 1970s through the 1990s. Census survey data gives a median build year of 1987, and about 35% of homes were built before 1980. That puts many houses in the age range where copper under a slab has had decades to wear at contact points with concrete or gravel, though slab construction is only one of the foundation types you'll see here.
Most of town gets water and sewer from Winston-Salem/Forsyth County Utilities under the town's agreement with the City-County Utilities Commission. The utility's 2025 report shows chlorinated, soft water (about 17.5 ppm average hardness) and lead and copper not detected at the 90th percentile, so the water isn't a known factor in pipe failure. Lewisville also has rural-zoned areas, and some homes there may be on wells. The utility hasn't published where its service line ends and yours begins.
Hot-side or cold-side leak
| Clue | Hot-water line | Cold-water line |
|---|---|---|
| Floor temperature | Warm patch, often noticeable | No change, or a cool damp area |
| Water heater | Runs more often, hot water runs out sooner | No change |
| Meter test | Moves; stops when the heater's cold inlet is closed | Moves even with the heater inlet closed |
| Energy bill | Often higher | Usually unchanged |
Knowing which side is leaking cuts locating time and helps the plumber decide whether a reroute of just that line is practical. If you can, close the cold inlet valve on top of the water heater during your meter test and note whether the dial stops; that one observation saves real time on the visit.
Other signs
- A water bill that keeps climbing without more use
- Carpet or the bottom of drywall damp with no fixture nearby
- New cracks in a tile or slab floor
- A sound like a faucet left on, coming from the floor
Seasonal notes
Lewisville summers bring heavy lawn watering, which can mask a slow leak on the bill. A meter test with irrigation off is more reliable. In winter, the warm spot from a hot-line leak is easier to feel on a cold floor. Permits for Lewisville plumbing work go through the joint Winston-Salem/Forsyth County Inspections Division, and the plumber can tell you whether a slab repair needs one.
Slab Leak Repair questions in Lewisville
Is the local water hard on the copper pipe under my floor?
How do I tell whether my house sits on a concrete slab?
How do I use the water meter to check for a leak I can't see?
We already fixed one slab leak. Will there be another?
More plumbing services in Lewisville
Slab Leak Repair nearby
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