Leak Detection
Find a hidden leak behind a wall, under a floor or between the meter and the house.
Leaks and water lines
Slab Leak Detection and Repair in St. Petersburg
A slab leak is a pressurized water line leaking in or under the concrete floor. Finding it accurately is the difference between a small opening and tearing up half a room.
Slab leaks rarely fix themselves. Call early and ask about repair options.
Signs of a slab leak
- Warm spot on the floorHot water leaking under a slab can warm the tile above it.
- Sound of running waterA hiss or trickle with every fixture turned off.
- Cracks and damp carpetMoisture near baseboards, or a musty smell with no source.
What a slab leak is
Many Florida homes are built on a concrete slab foundation. During construction, the water lines were laid in the ground or in the sand base and the concrete was poured over them. A slab leak is a leak in one of those lines, or in a fitting where they connect.
Most of the time the leak is on a pressurized supply line, either hot or cold. A drain line can leak under a slab too, but it behaves differently, since it only leaks when water is running down it.
Why slab lines fail
Copper pipe under a slab can corrode from the outside where it touches soil or concrete, and from the inside where water chemistry attacks it. The result is a pinhole that slowly grows. Pipe rubbing against gravel or other lines as the house settles can wear through the wall over many years.
Poor workmanship is a factor as well. A fitting that was not fully seated, or a line without protective sleeving where it passes through the concrete, can fail long after the house was built.
Cost
What affects the price of a slab leak repair
A slab leak is priced by how it is fixed more than by how it is found. These factors decide the number.
Get the quote in writing, and ask whether concrete cutting, permits and patching are included or priced separately.
In St. Pete
Slab homes, storm water and soil
Slab foundations are common across St. Petersburg and Pinellas County, which means slab leaks are a regular part of the plumbing picture for homes of every age. Newer homes mostly use plastic water lines, which do not corrode the way copper can, while older homes often still have the original metal pipe.
After a heavy storm, soil moves and saturates. If a leak was already forming, the added moisture can make it easier to notice, and a wet slab edge after rain is worth a closer look.
How a slab leak is located
The plumber first confirms a leak exists by checking the meter and pressure with the house shut off. Then the lines are isolated, hot side from cold side, to work out which one is leaking.
Listening equipment picks up the sound of water escaping and a plumber walks the floor to find where it is loudest. A thermal camera can also help on a hot water line. The result is a spot on the floor, marked, where the opening should be.
Repair options
There are usually three ways to deal with a slab leak. A spot repair opens the concrete over the leak, cuts out the bad section of pipe and replaces it. It is the least disruptive option when only one spot has failed.
A reroute abandons the leaking line and runs a new one through the walls or attic to the same fixtures. It avoids the concrete and is often chosen when the pipe is old and likely to leak again. Repiping the whole house is the third option, and it makes sense when leaks keep appearing at different places.
Ask the plumber to explain why one option fits your house. If the same line has leaked more than once, a reroute or repipe usually costs less than repeated spot repairs.
Slab leak signs
Signs the leak is under the floor
Slab leaks hide well. These are the clues owners notice first.
Getting to a pipe under concrete
Once the leak is located, the question is access. A contractor may saw cut a small section of the slab, break it out, fix the pipe and patch the concrete. In some cases the better route is to cut into the floor only at one point and tunnel to the pipe from the side.
Rerouting is another option. Instead of opening the slab, the plumber abandons the leaking run and installs new pipe through the attic or walls to the same fixtures. Rerouting can be quicker when several lines under the slab are old, but it opens walls and ceilings instead.
A driveway or garage slab brings extra questions about saw cutting and patching. Ask what the finished surface will look like and who pays for flooring or tile that has to be lifted.
Repair one line or repipe the house
If one section failed and the rest is sound, a spot repair or a single reroute may be enough. If several leaks have appeared in a short time, the pipe is likely wearing out as a whole. In that case many owners compare the cost of repeated slab repairs against a full repipe.
The detection step matters here. A thorough search tells you whether the failure is one pinhole or a pattern, and that guides the decision. Ask for the findings in plain terms before you commit to a larger project.
Related services
Repiping & Whole-Home Pipe Replacement
Replace worn galvanized, copper or older plastic pipe through the whole house.
Water Damage Restoration
Dry out and restore a home after a leak, burst pipe or storm water.
Common questions
Slab leak questions
Usually yes, as long as the water is shut off at the main when it is not needed and nothing is flooding. Do not leave it, because a steady leak can wash out soil under the slab and raise the water bill.
A technician can narrow it down by isolating lines and listening. A warm floor, the sound of water at the slab, and damp flooring that is not near a wall are common clues.
A long-running leak can soften soil under the slab and cause settling or cracks. A prompt repair limits that risk. A structural engineer can answer questions about a particular house.
It depends on the policy. Many policies cover the resulting water damage but not the cost of repairing the pipe itself, and some cover access costs. Ask your insurer before work starts.
Not always. A contractor can cut an access point, tunnel in from the side or reroute the line overhead. The best option depends on where the pipe runs and how many lines are aging.
Breaking concrete repairs the same pipe in place. A reroute leaves the old pipe unused and runs new pipe through the attic or walls. Each has trade-offs in cost, mess and long-term reliability.
Shut off the main valve, keep people away from wet electrical items and call. Then document the area with photos and note the meter reading.
If leaks keep appearing, comparing the two paths is wise. A single failure can be fixed in place, while repeated failures often point to pipe at the end of its life.
The goal is a small area, often a few feet, so only a small opening is needed. Ask whether the contractor marks the spot before any cutting.
Suspect a leak under the floor?
Shut off the main valve if you can, then call. Describe the sounds, warm spots or bill changes you have noticed.