Slab Leak Detection & Repair in Meridian, ID
Slab leak repair fixes a water line that has started leaking underneath a concrete floor. Finding the leak is the hard part, because the pipe is buried in or beneath the slab and cannot be seen.
Most Meridian homes sit over crawl spaces, so slab leaks are less common here than in slab-heavy markets. They still happen in slab-on-grade homes, additions, and garages, where water and hot water lines often run under the concrete.
There's water coming up at the edge of my garage slab. What is it?
Water seeping at the edge of a garage floor, a damp patch in the middle of concrete, or a floor that feels warm underfoot are the classic signs of a leak below the slab. In many Meridian homes the water heater sits in the garage, and its supply lines can run under or through that slab.
It can also be something simpler, like a leaking water heater drain or condensation. The first step is to confirm whether water is actually escaping from a pressurized line, which is what slab leak detection does.
Garage slabs in newer homes around Star often carry the water heater supply lines, which makes the garage the first place to look there.
If a slab leak has raised your bill, Meridian Water can confirm your meter readings, and slab-on-grade garages appear in many newer Ada County subdivisions off Ten Mile Road.
Signs of a leak under the slab
Slab leaks show themselves slowly. Watch for these.
- A warm spot on a tile or concrete floor, which points to a hot water line.
- Damp carpet or swelling flooring with no leak above it.
- Water appearing at the edge of a garage or patio slab.
- The sound of running water when every fixture is off.
- A water meter that keeps moving with everything turned off.
The meter test on our leak detection page confirms whether water is escaping somewhere in the system before any specialized equipment is used.
How a slab leak is pinpointed
The goal is to mark one spot on the floor, so only a small section is opened.
| Step | What it does | Why it matters |
|---|---|---|
| Isolation test | Separates hot and cold lines to see which one is losing pressure | Narrows the search to one line. |
| Line tracing | Maps the path of the pipe under the slab | Shows where the line actually runs. |
| Acoustic listening | Hears water escaping through the concrete | Pinpoints the leak along the traced line. |
| Thermal imaging | Shows heat from a leaking hot water line | Confirms hot water leaks without cutting. |
Methods are combined to confirm the location before any concrete is cut.
Open the slab or reroute the line?
Once the leak is marked, there are two main approaches. A direct repair cuts a small opening in the concrete, fixes the pipe, and patches the slab. It is the most direct fix when the rest of the line is in good shape.
A reroute abandons the leaking section under the slab and runs a new line through walls, the attic, or around the perimeter. It avoids breaking concrete and removes the risk of a second leak in the same buried line.
If the pipe under the slab has already leaked more than once, rerouting is often the better long-term choice. For homes with widespread pipe problems, repiping may make more sense than chasing individual leaks.
What affects the cost of a slab leak repair
Slab leaks are priced in two parts: finding the leak and fixing it.
- Detection time and equipment needed to pinpoint the leak.
- Direct repair through the slab versus a reroute.
- Floor coverings that must be lifted and replaced.
- Concrete cutting and patching.
- Drying any wet flooring or subfloor afterward.
Many homeowners policies pay to access and repair a sudden leak and the resulting damage but not the pipe itself. Check your policy. Call (208) 679-8357 for your price before work begins.
Suspect a slab leak in Meridian?
Call to pinpoint it before any concrete is cut.
Slab leak questions
Are slab leaks common in Meridian?
Less than in slab-heavy regions, since many Meridian homes are built over crawl spaces. They do occur in slab-on-grade homes, additions, and garages.
How do you find a leak under concrete?
By isolating the lines, tracing the pipe path, and listening for escaping water with acoustic equipment. Thermal imaging helps with hot water lines.
Do you have to jackhammer my whole floor?
No. The leak is pinpointed first, so only a small section is opened. Rerouting avoids cutting concrete at all.
Is a reroute better than repairing under the slab?
If the buried line has leaked before, often yes, because it removes the risk of another leak in the same pipe.
Will insurance cover a slab leak?
Many policies cover access and resulting damage from a sudden leak but not the pipe itself. Your policy decides.
Can a slab leak raise my water bill?
Yes. A pressurized line leaking under a slab runs around the clock.