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Foundation Leak Repair · Dallas–Fort Worth
Foundation Leak Repair in Dallas–Fort Worth
A hidden under-slab plumbing leak soaks the clay under your home — and the foundation follows: cracks, sloping floors, doors that stick. FCS finds the leak, fixes the cause, and repairs the foundation, all in-house.
Accredited & Recognized Across North Texas
The Hidden Cause
What is a foundation leak — and why it moves your slab
A foundation leak (or slab leak) is a supply or drain line leaking under your concrete slab. You cannot see it — but on North Texas soil, it never stays a plumbing problem.
DFW sits on expansive clay that swells when it gets wet and shrinks when it dries. A slow under-slab leak keeps the soil swollen in one spot, year-round — so one part of the foundation heaves or settles while the rest of the house stays put. That differential movement is what cracks brick, racks door frames and slopes floors.
Here is the part most homeowners miss: the crack you can see is the symptom — the leak is the cause. Patch the crack or pier the corner without fixing the leak, and the movement comes back. That is why FCS treats the leak and the foundation as one repair.
Warning Signs
Signs of a slab leak under your home
A slab leak hides under concrete, but it leaves fingerprints. Call us if you notice any of these:
Unexplained spike in the water bill — the classic first clue — a supply line losing water 24/7.
Warm or wet spots on the floor — a hot-water line leak literally warms the slab above it.
Low water pressure — pressure bleeding out under the slab instead of reaching your fixtures.
Sound of running water — with every fixture off and everything valved shut.
Musty smell or mold — along baseboards and flooring where moisture wicks up through the slab.
New foundation cracks or sticking doors — especially soon after any plumbing issue — movement following moisture.
Seeing one of these? Call (972) 975-9338 — the on-site inspection is free, and testing is non-invasive.
The Process
How we find — and fix — a foundation leak
Same in-house crew, start to finish — the plumbing AND the foundation. No hand-offs, no finger-pointing between two contractors.
Pressure Test & Camera
We isolate and pressure-test the supply lines and run a camera through the drain lines — hard evidence, not guesswork.
Pinpoint the Leak
The leak is located precisely before anything is opened up — so the repair is surgical, not exploratory demolition.
Repair or Reroute the Line
We tunnel beneath the slab to repair the line in place, or reroute failing runs — like aging cast iron — so the leak cannot come back.
Stabilize the Foundation
If the slab already moved, the same company installs the engineered piers and re-levels — the leak fix and the foundation fix in one project.
Verify & Document
Lines are re-tested, elevations are confirmed, and the cause is documented — a straight report you can keep for your records or your insurer.
If poor surface drainage is feeding the problem, we correct that too — see our drainage correction systems.
One Accountable Team
The leak AND the foundation — under one roof
Most companies fix the crack and leave the leak — so the movement comes back. Or they pier the slab and hand you a plumber’s phone number, and when something goes wrong the two contractors point at each other. FCS does both: we find the leak, repair or reroute the line, and install the engineered pier work if the slab already moved — one in-house team, one schedule, one company accountable for the whole repair. Questions? Call (972) 975-9338.
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Insurance & Your Policy
Is a slab leak covered by insurance in Texas?
Here is where a plumbing cause actually works in your favor. Foundation damage from ordinary clay-soil settling is almost never covered — Texas policies treat it as gradual earth movement. But plumbing-related foundation damage MAY be covered if your policy carries the Texas plumbing-leak endorsement (form HO-143TX).
That makes the diagnosis on this page more than a repair step — it can be the difference in what your carrier pays. Our testing establishes whether a plumbing leak caused the movement, and we document the cause honestly: a straight, defensible report you can put in front of your insurer.
We will never invent a plumbing cause to force a claim — and this is educational information, not insurance advice. Check your declarations page for the endorsement and confirm coverage with your carrier.
Honest Pricing
What foundation leak repair costs
No two leak projects price the same — but the way we price them is always the same: tested, itemized, in writing.
The leak work is priced by scope and access: a single spot repair reached by tunnel costs far less than rerouting a failing cast-iron system.
Testing comes first: camera and pressure testing pinpoint the problem before anything is opened up — you never pay for exploratory digging.
If the foundation already moved: pier work runs $1,000–$3,500 per pier, and typical DFW foundation repairs run $3,300–$8,500 — see our full cost guide.
Financing available: an urgent leak does not have to wait on savings — flexible payment options break the repair into monthly payments.
You see your exact number — leak, foundation, or both — in a free written estimate before you spend a dollar.
Why FCS
Why DFW homeowners call FCS for foundation leaks
Plumbing AND Foundation In-House
The leak and the movement fixed by one accountable team — never a hand-off to a second contractor.
Lifetime TRANSFERABLE Warranty
Our warranty follows the home to the next owner — and we honor it, even years later.
25+ Years in DFW
A quarter-century on North Texas clay — we have seen your soil, your pipes and your era of construction before.
Free Inspection + Written Estimate
Testing-based diagnosis and a transparent, itemized quote — at no cost and with zero pressure.
In-House Crew, Locally Owned
NFRA member, Dallas-owned — the crew under your house is ours, never a sub.
Financing Available
Flexible payment options so an urgent leak repair fits your budget without delay.
Leak & Plumbing Homeowners on FCS
5.0 across 490+ reviews
Our cast iron pipes developed a leak, which shifted our home again. Not only did FCS honor their warranty and leveled my home again, I also hired them to replace the cast iron pipes with pvc…they did a great job, addressed any concerns and questions I had and cleanup was great!
FCS repaired multiple plumbing breaks, collapsed drain line and rerouted the plumbing. Additionally, they repaired the foundation… the work ethic, timeliness and professionalism were outstanding. They kept me informed every step of the way… Their customer service was stellar and pricing very competitive.
I was having foundation and plumbing issues for awhile… my house was built in the 1970s and since our soil is mostly clay there was a lot of damage… the crews for both the foundation and plumbing were outstanding… Should you ever need foundation/plumbing repairs please consider FCS — they were excellent!
Common Questions
Foundation leak repair FAQs
Find the leak before it moves your foundation
A slow leak never gets cheaper to fix. One free inspection tells you what is happening under your slab — camera and pressure testing if a leak is suspected, an elevation survey, and a written estimate with your exact number. No obligation, no pressure.
