Slab Leak Repairs in Shreveport, LA

Advanced Slab Leak Detection & Repair from Northern Louisiana’s Trusted Plumbing Team

A slab leak — a break or crack in a water or drain line running beneath your home’s concrete foundation — is one of the most serious plumbing issues a Shreveport homeowner can face. Mark Johnson & Sons Plumbing uses non-invasive detection technology and proven repair methods to locate and resolve slab leaks accurately, protecting your foundation and your home from progressive water damage. As part of our comprehensive plumbing services in Shreveport, we deliver professional results backed by decades of experience.

Why Slab Leaks Are a Serious Concern in Shreveport

Northern Louisiana sits on expansive clay soil that swells when saturated and contracts during dry spells. This constant cycle of expansion and contraction places significant stress on the pipes embedded in and beneath your concrete slab. Over time, copper supply lines and cast iron drain lines shift, rub against aggregate, and develop fractures that allow water to escape directly into the soil under your home.

The consequences compound quickly. Leaking water saturates the clay beneath the foundation, causing uneven swelling that can lift or tilt sections of the slab. Cracks appear in walls, doors stick, and floors develop noticeable slopes. Left unaddressed, a slab leak can undermine the structural integrity of the entire foundation — turning a plumbing repair into a major construction project.

Shreveport’s warm climate also means that moisture trapped under a slab creates ideal conditions for mold growth beneath flooring materials. By the time homeowners notice musty odors or warped flooring, the leak may have been active for weeks or months.

Our Slab Leak Services

Electronic Leak Detection

We use acoustic listening equipment and electromagnetic line locators to identify the precise location of a slab leak without guesswork. By isolating the supply or drain system and monitoring pressure changes and sound signatures, we pinpoint the failure point before any concrete is opened.

Spot Repair

When the leak is isolated to a single point and the surrounding pipe is in good condition, we open a targeted section of the slab, repair or replace the damaged segment, pressure-test the line, and restore the concrete. This is the most cost-effective option when the overall pipe system is sound.

Reroute (Overhead or Perimeter)

If the pipe beneath the slab has deteriorated to the point where spot repairs would only postpone future failures, we abandon the in-slab line and reroute a new supply line through the attic, walls, or along the exterior perimeter. This approach avoids repeated slab cuts and gives you a fully accessible replacement line.

Epoxy Pipe Lining

For certain drain line slab leaks, we offer trenchless epoxy lining that coats the interior of the existing pipe with a structural epoxy barrier. This seals cracks and restores flow without cutting through concrete, and the cured lining is rated for decades of service.

Foundation Damage Assessment Coordination

When a slab leak has caused visible foundation movement, we work alongside structural engineers and foundation repair contractors to ensure the plumbing fix and the foundation correction happen in the right sequence.

Call us at 318-319-0220 today or click below to schedule service.

When to Call

• You hear running water when all fixtures and appliances are off
• Your water bill has increased significantly without explanation
• Warm or hot spots appear on your floor in unexpected areas
• Cracks develop in interior walls, especially near the floor line
• Flooring materials buckle, warp, or show moisture staining
• You notice a musty or mildew smell with no visible water source
• The water meter continues to move with every valve in the house closed
• Foundation cracks appear or doors and windows begin sticking

Why Choose Mark Johnson & Sons in Shreveport

• Non-invasive detection — we locate the leak before opening any concrete
• Multiple repair options — spot repair, reroute, or lining based on your situation and budget
• Licensed journeyman plumbers — trained and certified for sub-slab plumbing work
• Upfront flat-rate pricing — detailed quotes provided before any cutting begins
• Veteran-owned since 1997 — a family business built on integrity and straight talk
• Familiarity with Shreveport soil conditions — we understand the challenges of building on Northern Louisiana’s expansive clay

Frequently Asked Questions

How do I know if I have a slab leak?

The most reliable early indicator is an unexplained increase in your water bill. Other signs include the sound of running water when nothing is on, warm spots on tile or concrete floors, and damp or buckled flooring. A professional pressure test can confirm whether a leak exists.

What causes slab leaks in Shreveport homes?

The primary causes are soil movement from expansive clay, corrosion of copper or cast iron pipe, abrasion from pipe contact with aggregate in the concrete, and poor original installation. Shreveport’s clay-heavy soil makes homes in this area more susceptible than average.

How much does slab leak repair cost?

Cost depends on the repair method, the location of the leak, and the pipe material involved. A spot repair on an accessible line is significantly less expensive than a full reroute. We provide a detailed flat-rate quote after detection so you can make an informed decision.

Will you have to jackhammer my floor?

Not always. If a reroute or epoxy lining is the best option, we can avoid opening the slab entirely. When a spot repair is the right approach, we cut only the minimum area necessary and restore the concrete when finished.

Can a slab leak cause foundation damage?

Yes. Water saturating the clay soil beneath your foundation causes uneven expansion that can lift, tilt, or crack the slab. Early detection and repair minimizes foundation risk significantly.

Does homeowner’s insurance cover slab leak repairs in Louisiana?

Many Louisiana homeowner’s policies cover the cost of accessing the leak — breaking and restoring concrete — and resulting water damage, but not the pipe repair itself. Policies vary, and we provide the documentation insurers typically request.

How long does a slab leak repair take?

A spot repair is usually completed in one day. A reroute may take one to two days depending on the length of the new line and the access points involved. Detection itself typically takes two to four hours.

Can slab leaks come back after repair?

A properly repaired section should not leak again. However, if the surrounding pipe is in poor condition, additional failures in different locations are possible — which is why we sometimes recommend a reroute over repeated spot repairs.

Do you repair slab leaks on drain lines as well as supply lines?

Yes. We detect and repair both supply-side and drain-side slab leaks. Drain line slab leaks are often candidates for epoxy lining, which avoids concrete removal entirely.

What areas of Shreveport are most prone to slab leaks?

Homes in areas with heavy clay content — which includes much of Caddo Parish — are at higher risk. Properties built on fill soil or near the Red River floodplain may also experience more soil movement and associated pipe stress.

Related Shreveport Services

• Backflow Testing & Certification in Shreveport
• Bathroom Plumbing in Shreveport
• Bathroom Remodeling in Shreveport
• Toilet Repair in Shreveport
• Water Leak Detection in Shreveport
• Repiping in Shreveport
• Burst Pipe Repair in Shreveport

View all plumbing services in Shreveport or explore our full Shreveport service area.

Contact Us Today

Slab leaks do not resolve on their own, and every day of delay increases the risk to your foundation and your home. If you suspect a slab leak, Mark Johnson & Sons Plumbing can locate it quickly and repair it right. Call 318-319-0220 or click below to schedule detection service.