A slab leak is a water-line leak under the concrete foundation slab of your home. They're particularly insidious because the water has to go somewhere — usually into the slab, the framing, or out the edges of the foundation — long before you see anything obvious. BF Plumbing & Drain locates and repairs slab leaks across North Atlanta using electronic leak-detection equipment, then chooses the right fix: spot repair through the slab, re-route through walls and attic, or full repipe when the existing copper has too many failure points.
Slab leaks rarely fix themselves. The longer they run, the more damage to the foundation, flooring and framing. Early detection limits the repair scope significantly.
Symptoms of a slab leak
Slab leaks often announce themselves subtly:
- Warm spot on the floor (hot-water-line leak).
- Sound of running water with everything off.
- Unexplained increase in water bills.
- Mildew smell or moisture along baseboards.
- Cracks in floor tile, hardwood cupping, or carpet wet.
- Low water pressure that doesn't recover.
Our slab leak process
Slab leak work succeeds or fails on the location step:
- 1
Confirm slab leak
Pressure test, meter test, line isolation. We confirm the leak is in fact under the slab and not in a wall or in the yard.
- 2
Electronic location
Acoustic listening equipment and tracer-gas tools pinpoint the leak to within inches. Accurate location is the difference between a 12" floor cut and a 4-foot exploratory trench.
- 3
Repair method decision
Spot repair — cut the slab, repair the line, patch. Re-route — abandon the leaking section and run new line through walls and ceiling. Repipe — replace the entire under-slab system when it has multiple failure points.
- 4
Execution
Slab work is dust-controlled. We protect flooring and adjacent rooms. Repairs are typically PEX or copper depending on the existing system.
- 5
Pressure test, restore, document
Repaired or re-routed line is pressure-tested. Concrete and flooring restoration coordinated with the homeowner's preferred finishes.
What slab leak work costs in North Atlanta
Variable. The detection step is critical and usually a separate flat-rate fee. Repair drivers:
- Leak depth and location under the slab.
- Spot repair vs. re-route vs. full repipe.
- Flooring above the leak — tile, hardwood, carpet, polished concrete.
- Concrete restoration and patching.
- Whether the leak has caused secondary damage (flooring, drywall, framing).
- Insurance coordination, if applicable.
Slab construction in North Atlanta
North Atlanta is a patchwork of housing stock and soil conditions, and that drives a lot of plumbing decisions. Subdivisions built in the 1990s and early 2000s across Canton, Woodstock and Holly Springs typically run builder-grade PVC and CPVC that's now reaching end-of-life on fittings and shutoffs. Older homes in Marietta, Roswell and Kennesaw still have cast-iron drains and copper supply that scale up and pinhole. Newer construction in Acworth, Ball Ground and Cumming sits on red clay that shifts seasonally and stresses underground lines.
We work in this market every day, so we know which neighborhoods have shared sewer easements, which water utilities require a permit pull, and which inspectors want to see specific fittings. That local knowledge shortens the job and keeps it code-correct the first time.
Need service in a specific area? See our pages for Canton, Woodstock, Holly Springs, Acworth, Kennesaw, Marietta, Roswell and more on our service areas page.
Frequently asked questions
Is a slab leak an emergency?
Treat it like one. Active water under the foundation damages structure and finishes daily. Shut the main off and call us same-day.
Spot repair or re-route — which is better?
If the existing system is otherwise sound, spot repair is the least invasive option. If multiple leaks have occurred or the system is at end-of-life, re-routing or full repipe avoids the next slab cut six months from now.
Will my insurance cover this?
Policies vary. Many cover the resulting damage (flooring, drywall) but not the pipe repair itself. Always file the claim and document everything.
How long does the work take?
Detection is typically a few hours. Spot repair is 1 day plus concrete cure. Re-route is 1–2 days. Full repipe is 3–5 days.
Need it fixed today?
Same-day service across North Atlanta. Call now or request a quote online.