Water damage guide
Signs of a Slab Leak and What to Do Next
How to spot a slab leak in a Florida home: warm floor spots, running water sounds, high bills and damp flooring, plus how leaks are found and fixed.
Short answer
Short answer: Signs of a Slab Leak and What to Do Next
A slab leak is a leak in a water line under or within a home's concrete foundation, common in Florida's slab-on-grade houses. Warning signs include a water bill that rises without a reason, the sound of running water when nothing is on, a warm spot on the floor (hot-water line), damp or warped flooring, and a water meter that moves with every fixture off. A licensed plumber confirms it with pressure testing or electronic leak detection.
- Call (772) 218-9226
- Burst Pipes & Plumbing Leaks
- Moisture Detection
- Hardwood & Laminate Floors
In this guide
- 1Why slab leaks matter in Florida
- 2Warning signs
- 3The water meter test
- 4How plumbers find slab leaks
- 5Repair options
- 6The water damage side
- 7Insurance and documentation
Why slab leaks matter in Florida
Most homes in Fort Pierce and Port St. Lucie are built on concrete slabs, with supply lines running under or through the slab. When one of those lines leaks, water can soak the slab and the flooring above for weeks before anything is visible. Older homes with aging pipes are more prone to leaks.
Warning signs
- Your water bill rises with no change in how much water you use.
- You hear water running when every fixture is off.
- A warm or hot spot on tile or another floor, which can point to a hot-water line leak.
- Damp carpet, swelling baseboards, or cupping wood or laminate flooring.
- Cracks in tile or flooring that appear suddenly.
- Low water pressure or a water heater that seems to run constantly.
- A musty smell or mold near the floor.
The water meter test
This test tells you whether water is leaving the system somewhere.
- Turn off every faucet, appliance, irrigation system and the ice maker.
- Look at the water meter's leak indicator or write down the reading.
- Wait 15 to 30 minutes without using any water.
- If the indicator moved or the reading changed, there is a leak somewhere; a plumber can narrow down where.
How plumbers find slab leaks
Licensed plumbers use pressure tests to isolate which line is leaking, then electronic or acoustic leak detection and sometimes thermal imaging to find the spot under the slab. That avoids breaking up more floor than necessary.
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Repair options
The plumber will recommend an approach based on the leak location and the condition of the pipes.
| Option | What it involves | Typically chosen when |
|---|---|---|
| Direct (spot) repair | Opening the floor and slab at the leak and repairing the pipe | The leak is isolated and the rest of the line is in good shape |
| Reroute | Abandoning the line under the slab and running a new one through walls or the attic | Access is difficult or more leaks are likely |
| Repipe | Replacing larger sections of plumbing | Pipes are old and failing in several places |
The water damage side
Fixing the pipe is only half the job. Water from a slab leak can soak the slab, flooring, baseboards and the bottom of drywall. A restoration company measures moisture, removes flooring that cannot be saved, and dries the slab and walls before new flooring is installed. Concrete dries slowly, so moisture readings matter before reflooring.
Insurance and documentation
Coverage for slab leaks varies widely. Some policies cover access to the leak and the resulting water damage but not the pipe itself, and long-term leaks are often excluded. Read your policy, report the leak promptly, and keep the plumber's leak-detection report, photos and drying records.
Related services
Services that go with this guide
Burst Pipe & Plumbing Leak Water Damage
Burst supply lines, slab leaks and hidden plumbing leaks in Fort Pierce: what to do first, how cleanup and drying work and what insurance often covers..
Moisture Detection & Hidden Water Damage Assessment
Finding water you can't see in Fort Pierce homes: moisture meters, thermal imaging and moisture maps that show where water went and when it is dry..
Hardwood & Laminate Floor Water Damage
Cupping, crowning and swelling floors after a leak in Fort Pierce: what can be dried, what must be replaced, and how floor drying works..
Guides
Keep reading
- Signs of Hidden Water Damage in Walls, Floors and CeilingsWarning signs of hidden water damage in walls, floors and ceilings, what each one usually means, and how to confirm a leak before it spreads.
- How Long Does Water Damage Take to Dry?How long water damage takes to dry by severity, why Florida humidity slows drying, and how moisture readings confirm a home is dry before repairs.
FAQ
Questions people ask
Still unsure? Describe the problem on the phone and you will be connected with a restoration company serving your area.
What is a slab leak?
A leak in a water line under or within a concrete foundation slab.
What are the signs of a slab leak?
A rising water bill, the sound of running water, warm floor spots, damp or warped flooring and a moving water meter.
How do I test for a slab leak?
Turn off all water use and watch the water meter for 15 to 30 minutes. Movement means a leak somewhere.
Why is my tile floor warm in one spot?
A warm spot can indicate a hot-water line leaking under the slab. Have a plumber check it.
Are slab leaks common in Florida?
Most Florida homes are built on slabs, so leaks in under-slab plumbing are a known problem, especially in older homes.
How do plumbers find a slab leak?
With pressure tests, electronic or acoustic leak detection and sometimes thermal imaging.
How is a slab leak fixed?
By a spot repair through the slab, rerouting the line through walls or the attic, or repiping.
Is a slab leak an emergency?
It should be addressed promptly to limit water damage, foundation moisture and mold.
Does insurance cover slab leaks?
Coverage varies. Some policies cover access and resulting damage but not the pipe; long-term leaks are often excluded.
Can a slab leak cause mold?
Yes. Moisture under flooring and in the bottom of walls can support mold growth.
Can a slab leak damage my foundation?
Prolonged leaks can affect the soil and slab, which is one reason to fix them promptly.
How long does a slab dry after a leak?
Concrete dries slowly, often over weeks. Moisture readings confirm when it is ready for new flooring.
Should I turn off my water if I suspect a slab leak?
If water is visibly damaging the home, yes. Then call a plumber.
Who repairs the flooring after a slab leak?
A restoration company dries the area and a licensed contractor replaces flooring once it is dry.
Who handles slab leak water damage in Fort Pierce?
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