A slab leak is a water line that’s broken underneath your home’s concrete foundation, and it needs to be found and fixed before it damages the slab, the flooring, or the structure above it. Detection uses listening equipment and pressure testing to pinpoint the break without tearing up your whole floor, and repair usually means either a targeted access cut or rerouting the line around the slab entirely.
What a Slab Leak Actually Is
Most homes built on a concrete slab run their water supply lines either through the slab or just underneath it. Over years of soil movement, pipe corrosion, or ground settling, those lines can crack or rupture. Because the pipe is buried in or under concrete, the water doesn’t show up right away the way it would from a burst pipe under a sink. It seeps into the soil, into the slab itself, or along the path of least resistance until it finds a crack to surface through.
Signs You Might Have One
- A noticeably higher water bill with no obvious explanation
- A warm spot on the floor, which usually points to a hot water line leak
- The sound of running water when every fixture in the house is off
- Damp carpet, baseboards, or flooring with no visible source
- A drop in water pressure throughout the house
- Cracks in the slab, walls, or flooring that seem to be getting worse
- Mildew smell in a room with no obvious moisture source
Any one of these on its own isn’t proof of a slab leak, but a few of them together is worth having checked out rather than waiting to see if it gets worse.
How Slab Leaks Are Found
Guessing where a leak is under concrete and cutting into the slab to look is expensive and unnecessary. A proper diagnosis uses a combination of methods before anyone touches the floor:
- Acoustic listening equipment picks up the sound of water escaping under pressure through the slab, which narrows the leak location to a small area.
- Pressure testing isolates sections of the plumbing system to confirm which line is losing pressure and roughly where.
- Thermal imaging can sometimes pick up temperature differences in the slab from a hot water line leak.
- Video inspection of drain lines is used when the leak is suspected to be on the sewer or drain side rather than the supply side.
The goal of all of this is to open the smallest amount of concrete necessary, not to dig a trench across your living room on a guess.
How Slab Leaks Get Repaired
Once the leak is located, there are generally two paths:
- Spot repair: A small section of slab is cut open directly over the leak, the damaged section of pipe is replaced, and the concrete is patched back. This works well when the leak is in an accessible spot and the rest of the line is in good condition.
- Reroute: Instead of repairing the line under the slab, a new line is run through the attic or along an exterior wall, bypassing the damaged section entirely. This is often the better long-term choice for older homes where the rest of the under-slab plumbing is the same age and material as the section that already failed.
Which option makes sense depends on the age of the home, the type of pipe, and where the leak is. A straight answer on that only comes after the leak is actually located.
Why Waiting Makes It Worse
A slab leak doesn’t fix itself and it doesn’t stay small. Left alone, it can undermine the soil beneath the foundation, cause cracking in the slab or walls above it, and create ongoing mold or mildew conditions under flooring. It also keeps running up the water bill the entire time it’s ignored. None of that means every warm spot on the floor is an emergency, but a confirmed slab leak is not something to put off a few more months.
Slab Leak Service in Haltom City and Fort Worth
Silver Spur Home’s Haltom City location, at 4204 Garland Dr, handles slab leak detection and repair for homes and light commercial properties across Fort Worth, Dallas, Arlington, Keller, Watauga, North Richland Hills, Hurst, Bedford, Grapevine, and Denton. Plumbing work is performed under a Texas Master Plumber license, and repairs carry a one-year labor warranty. Silver Spur has been doing this work in the area since 1997, runs 25 branded service vehicles, and has built up over 3,000 customer reviews at a 4.9 star average. Phones are answered around the clock, with same-day dispatch available for active leaks.
If you’re dealing with a slab leak, you may also want to look at pre-freeze plumbing inspections to catch issues before cold weather adds stress to your lines, or water heater repair and replacement if your leak turns out to involve a hot water line. For a broader look at how to vet who’s doing the work, see choosing a trustworthy contractor in Haltom City.
If you’re seeing a warm spot on the floor, a water bill that doesn’t add up, or sounds of running water with everything off, call Silver Spur Home in Haltom City at (682) 268-4077 and have it checked out properly.
Common questions
What is a slab leak?
A slab leak is a break in a water line running through or under a home’s concrete foundation, which can slowly damage the slab, flooring, and structure if left unrepaired.
How do I know if I have a slab leak?
Common signs are a sudden rise in your water bill, a warm spot on the floor, the sound of running water when fixtures are off, and unexplained dampness or cracking in the slab or flooring.
How is a slab leak located without tearing up the whole floor?
Technicians use acoustic listening equipment, pressure testing, and sometimes thermal imaging to narrow down the exact location before opening any concrete.
Is it better to repair or reroute a slab leak?
A direct spot repair works when the leak is accessible and the rest of the line is sound, while rerouting the pipe through the attic or an exterior wall is often better for older homes where more leaks are likely to follow.