Slab Leak Detection and Repair
Quick answer
A slab leak is a supply or drain pipe leaking under a concrete foundation. Signs are an unexplained jump in the water bill, warm spots on the floor, the sound of running water with every tap off, and damp or cracked flooring. A plumber finds it with acoustic and thermal equipment before pricing the repair. Call (888) 217-6781 to reach a plumbing company with leak detection in your ZIP.
Follow the short menu, then your 5-digit ZIP. The line goes quiet for a few seconds while it connects; stay on. If it does not connect, call once more: companies taking calls change minute to minute.
Signs you need a plumber
- A water bill that jumped without a change in use
- Warm spots on a tile or concrete floor
- Running water sounds with every fixture off
- Damp carpet or cracked flooring with no source above
- The water meter moving while nothing is on
A hot water line leaking under the slab runs your water heater nonstop as well. If you hear water and the meter moves, close the main shutoff between uses until it is found.
What to check before you call
- Turn off every fixture and watch the meter for 15 minutes
- Feel the floor for warm areas, especially along hot water runs
- Check whether the water heater is running when no hot water is in use
What the plumber does
- 1
Locates the leak
Pressure-tests the lines, then pinpoints the spot with acoustic listening and thermal imaging.
- 2
Chooses the repair
Spot repair through the slab, rerouting the line through walls or attic, or relining the pipe.
- 3
Restores the line
Tests the repaired line under pressure before the floor is closed.
Ready to book a plumber?
One call reaches a plumbing company taking calls in your ZIP.
Follow the short menu, then your 5-digit ZIP. The line goes quiet for a few seconds while it connects; stay on. If it does not connect, call once more: companies taking calls change minute to minute.
Step-by-step guides
Who to Call for a Slab Leak: Leak-Detection Plumber First, Then Restoration
A slab leak needs a plumber with electronic leak-detection equipment before anyone can price the repair, and a restoration company for the floors and walls the water has been soaking from below. The order of calls, what each one does, and what it costs.
Slab Leak Detection and Repair: Signs, Costs, and What to Do
Slab leaks are invisible until the damage is severe — by the time you see a wet floor or hear running water, you may have weeks of moisture trapped under your flooring. Here's how to detect, address, and document a slab leak.
Slab leak repair: common questions
How do plumbers find a slab leak?
They isolate which line is losing pressure, then listen for the leak with acoustic equipment and look for the heat signature of a hot water line with a thermal camera, so the slab is opened in one spot.
Is it better to reroute or repair under the slab?
It dependsOn the pipe's age and how many leaks it has had.
A single leak in sound pipe is often spot-repaired; repeated leaks or old pipe often make rerouting the better choice. The plumber should explain both.
Does a slab leak damage the foundation?
Water running under a slab for months can wash out soil and stain or lift flooring. That is why finding it early matters.
Other plumbing services
(888) 217-6781 is the plumbing line. HearthDry is a referral service; the company you reach is independent.