Share:

What are signs of a slab leak under concrete

Wondering how much hydro jetting costs in Katy, TX? Learn average prices, what affects the cost, and why Orys Plumbing Solutions is the trusted choice for expert drain cleaning.

Plumbing problems can be stressful, but few are as sneaky and damaging as a slab leak. A slab leak happens when water pipes running under the concrete foundation of your home begin to leak. Since these pipes are hidden, the leak often goes unnoticed until serious damage is done. Homeowners in Katy and across Texas need to be especially careful because soil conditions, shifting foundations, and aging plumbing systems all increase the risk.

In this guide, we’ll walk you through everything you need to know about slab leaks, focusing on the most important part: the warning signs. If you can spot the signs early, you can protect your home from costly repairs and water damage.

What Is a Slab Leak?

Before diving into the warning signs, let’s understand what a slab leak is.

  • Definition: A slab leak is a plumbing leak that occurs in the water lines located beneath your home’s concrete foundation (the slab).
  • Causes: These leaks can be caused by corrosion, shifting soil, poor pipe installation, high water pressure, or even tree roots pressing against underground pipes.
  • Impact: Since they happen below your home, slab leaks can damage the foundation, flooring, walls, and even lead to mold growth.

Why Slab Leaks Are Serious

Unlike a leaky faucet or a clogged drain, slab leaks are hidden out of sight. That makes them hard to detect until the problem becomes severe. Left untreated, slab leaks can cause:

  • Structural damage to your foundation
  • Mold and mildew inside walls and floors
  • Skyrocketing water bills from wasted water
  • Loss of water pressure throughout the house
  • Major repair costs that increase the longer the leak is ignored

This is why knowing the early warning signs is so important.

Top Signs of a Slab Leak Under Concrete

Here are the most common red flags homeowners should watch for:

1. Unexplained Increase in Water Bills

If your water bill suddenly spikes without a change in usage, a hidden leak may be to blame. Since slab leaks are underground, the water escapes continuously, adding up quickly.

What to watch for:

  • Water bills rising steadily month after month
  • A sudden jump in charges without explanation

2. Damp or Wet Spots on Floors

Do you notice mysterious wet patches on your floor? If water is leaking under the slab, it can rise upward through the concrete and into your flooring.

Common signs include:

  • Damp carpet or warped wood flooring
  • Wet spots on tile or vinyl that don’t dry
  • Warm areas on the floor (if the hot water line is leaking)

3. Mold or Mildew Smells

Moisture from slab leaks often leads to mold or mildew growth inside your home. Even if you can’t see the mold, you may smell it.

Warning signs:

  • Musty odors in certain rooms
  • Mold growing along baseboards or under carpets
  • Increased allergy or asthma symptoms indoors

4. Foundation Cracks

A slab leak can cause soil to shift or wash away under your foundation. Over time, this creates pressure that may crack the foundation or walls.

Check for:

  • New or widening cracks in your foundation
  • Cracks in walls, ceilings, or tile flooring
  • Doors and windows sticking due to shifting structure

5. Low Water Pressure

When water escapes through a slab leak, less water reaches your faucets and fixtures. If you notice low pressure throughout the house, it may be due to a leak underground.

Pay attention to:

  • Showers losing water pressure
  • Faucets running weakly even when turned fully on

6. Sounds of Running Water

Do you hear water running when no taps are on? That’s a strong sign of a hidden leak. Sometimes slab leaks create a faint hissing or rushing sound beneath the floor.

Listen for:

  • The sound of water even when fixtures are off
  • A running water meter despite no usage

7. Warm or Hot Floors

If the hot water line under your slab is leaking, you may notice parts of your floor feel warm. Tile, wood, or carpet in these spots may also become discolored or warped.

8. Pooling Water Around the Home

Sometimes slab leaks show up outside the house. If water escapes under the foundation, it can pool around the exterior.

Signs include:

  • Puddles near the foundation with no rain
  • Soil erosion or soggy patches in the yard

How Slab Leaks Are Diagnosed

If you notice any of these warning signs, it’s important to call a professional plumber immediately. At Orys Plumbing Solutions, we use advanced tools to find slab leaks without tearing up your entire floor.

Common diagnostic methods include:

  • Electronic leak detection (listening devices)
  • Infrared cameras to find warm or damp spots
  • Pressure testing the water lines
  • Sewer camera inspection (if the leak is in a drain line)

How Slab Leaks Are Repaired

Fixing a slab leak requires expertise and the right tools. Depending on the severity and location, plumbers may use:

  1. Spot Repair – Breaking into a small section of the slab to repair the pipe.
  2. Rerouting Pipes – Running new pipes around the foundation instead of under it.
  3. Pipe Lining or Coating – Using epoxy coating or lining inside existing pipes to seal leaks.

Each home is different, so a plumber will recommend the most effective solution.

Why You Shouldn’t Ignore a Slab Leak

Delaying slab leak repair can lead to:

  • Costly structural repairs
  • Dangerous mold growth
  • Ruined flooring and furniture
  • Higher utility bills

Catching the signs early saves time, money, and protects your home.

How to Prevent Slab Leaks

While not all slab leaks can be avoided, you can reduce your risk with proper maintenance:

  • Schedule annual plumbing inspections
  • Install a water pressure regulator to prevent pipe stress
  • Use water softeners if you have hard water (to prevent pipe corrosion)
  • Watch for early warning signs like high bills or damp spots

Why Choose Orys Plumbing Solutions for Slab Leak Repair in Katy, TX

At Orys Plumbing Solutions, we understand how stressful slab leaks can be. That’s why we provide expert slab leak detection and repair for homeowners in Katy and surrounding areas.

  • Licensed and experienced plumbers with advanced tools
  • Fast and accurate leak detection without unnecessary damage
  • Affordable repair solutions tailored to your home
  • Emergency plumbing services for urgent leaks

When you suspect a slab leak, don’t wait. Our team will find the problem, fix it quickly, and protect your home’s foundation.

Conclusion

Slab leaks are one of the most serious plumbing issues a homeowner can face. Since they occur under the concrete foundation, they’re often hard to spot until significant damage occurs. By watching for signs like damp floors, musty smells, foundation cracks, or rising water bills, you can catch the problem early.

If you think you may have a slab leak in Katy, TX, call Orys Plumbing Solutions right away. Our skilled plumbers are here to provide fast, reliable slab leak detection and repair to protect your home.