Slab Leak & Under-Slab Plumbing Repair in Dallas

Under-Slab Plumbing Repair Services.

What Is an Under-Slab Leak?

Most Dallas-area homes are built on a concrete slab, with water and drain lines running beneath it. Over time, one of those lines can crack or corrode, and water can seep into the soil beneath your foundation. That’s an under-slab leak, and it’s one of the most damaging plumbing failures a homeowner can face.

When left unrepaired, an under-slab leak erodes the soil beneath your foundation, causing settlement, cracking, and structural movement, which can lead to costly repairs. Cole’s Plumbing has served Greater Dallas with licensed under-slab leak repair since 2001.

Signs You May Have an Under-Slab Leak

If you notice any of the following, call before the damage spreads:

  • Unexplained spike in your water bill
  • Warm or hot spots on your floor
  • Sound of running water when nothing is on
  • Cracks in your foundation, walls, or flooring
  • Wet or damp flooring without a clear source
  • Mold or mildew smell near floors or baseboards
  • Low water pressure throughout the home

How Cole's Plumbing find and Fix Under-slab Leaks

Every repair starts with a proper diagnosis. Cole’s uses electronic leak detection and pressure testing to pinpoint the leak location before any concrete is touched. Once located, repair options depend on the pipe condition and access:

  • Spot repair: Direct access to the damaged section, minimal disruption.
  • Pipe reroute: Running a new line through walls or attic when the existing pipe is compromised.
  • Tunneling: Excavating beneath the slab to preserve flooring, preferred for finished interiors.
  • Whole-home repipe: When aging pipes make spot repairs a short-term fix.


You’ll get a clear explanation of the options and a recommendation based on what’s actually wrong, not what’s most expensive.

Under-Slab Leak Causing Active Damage?

Water under your foundation doesn’t wait for business hours. Cole’s Plumbing is available evenings and weekends too.

Cole's Plumbing

Why Choose Cole's For Under-Slab Plumbing?

1.

Licensed Oversight

Every job is overseen by a Texas Responsible Master Plumber, accountable from estimate through final inspection.

2.

Transparent Pricing

You'll know the scope and the cost before any work begins. No surprises, no pressure.

3.

Clear Communication

We explain what we found, what we recommend, and what we ruled out, in plain language you can act on.

4.

Built on Trust

Between our Google reviews from real customers and our BBB rating, our reputation is built on people like you.

Under-Slab Leak Causing Damage

Chad Cole holds a Texas Responsible Master Plumber license, RMP-40414, the apex plumbing credential in the state. When you call us, a licensed plumber from Cole’s Plumbing is on-site, not a crew of handymen you’ve never met.