Slab leaks are one of those home problems that sneak up on you. You don’t see them coming, and by the time you notice something’s off, you could be looking at serious damage. The key is spotting the signs early – before your foundation, flooring, or bank accounts takes a hit.
Heres how to know if you might have a slab leak.
First, What’s a Slab Leak?
A slab leak happens when a water pipe beneath the concrete foundation of your home breaks, cracks, or starts leaking. These pipes are buried under several inches of concrete, so unlike a leaky faucet, you won’t see the water dripping. But the signs are there – if you know where to look.
Unusually High-Water Bills
If your water hasn’t changed but your bill suddenly spikes, that’s a red flag. A hidden leak under your slab could be wasting hundreds of gallons of water without you realizing it.
What to do: Compare past bills. If there’s a big jump and no obvious cause, call a plumber to check for hidden leaks.
The Sound of Running Water (When Everything’s Off)
Hear water running no taps are on, no toilets are flushing, and no appliances are running? That could be water leaking under your home.
What to do: Turn off everything that uses water and listen closely. If the sound persists, it’s time to investigate further.
Warm or Damp Spots on the Floor
This is especially common with hot water line leaks. If you notice a patch of your floor that’s warm, damp, or even steamy, that could be water escaping from a pipe under the slab.
What to do: Walk around barefoot and see if you notice any hot or wet areas, especially in tile or wood flooring.
Cracks in Walls or Flooring
Leaks under your foundation can shift or weaken the slab. That pressure can cause cracks in tile, flooring, or even your walls.
What to do: Take note of new or widening cracks. If they appear suddenly or grow quickly, it could be related to a slab leak undermining the structure.
Mildew or Musty Smells
Water from a slab leak doesn’t always soak through to the floor, but when it does, it creates a perfect environment for mold. If you catch a musty smell and can’t find the source, the leak might be coming from below.
What to do: Trust your nose. If you smell mold but can’t see it, a hidden leak is a good suspect.
Low Water Pressure
A leak in the main water line under your slab can reduce the overall pressure in your plumbing. If your shower suddenly feels weaker, and there’s no municipal issue in your area, a slab leak could be to blame.
What to Do If You Suspect a Slab Leak
Don’t guess – get it checked. Slab leaks don’t fix themselves, and the longer you wait, the more damage they do. Ottagan Plumbing can do diagnostic tests to confirm if there is a leak and pinpoint its location.