There’s a particular kind of anxiety that hits Bentonville homeowners when they start seeing their water bill climb—and nothing obvious explains why. No dripping faucets. No visible wet spots. No running toilets. Just a slowly rising bill and a nagging feeling that something’s wrong.

More often than we’d like, the culprit is underground. Specifically, it’s a slab leak—a break or pinhole in the water lines running beneath your home’s concrete foundation. And in Bentonville, it’s a problem we see more than most people realize.

I’m Ben Rowell, CEO of Benjamin Franklin Plumbing of Rogers. We’ve been responding to slab leak calls across NWA long enough to know that the homeowners who catch them early spend a fraction of what those who ignore the signs spend down the road. This article walks you through what a slab leak is, why Bentonville homes are particularly vulnerable, how we detect them, and what your repair options look like.

What Is a Slab Leak, Exactly?

A large number of homes built in Bentonville and across NWA are built on a concrete slab foundation. The water supply and drain lines run beneath that slab—beneath the concrete—before they come up into your home.

A slab leak is any leak that occurs in those under-slab pipes. Because the pipes are encased in concrete, you can’t see the leak directly. Water seeps through the concrete, up into your flooring, into your walls, and sometimes, pooling under the house where it quietly causes foundation damage for months before anyone notices.

Slab leaks can develop in supply lines (which carry pressurized water) or drain lines (which carry wastewater out). Supply line leaks are often more immediately obvious—they’re under pressure, so the water doesn’t wait. Drain line leaks are slower and often more insidious.

Why Bentonville Homes Are at Elevated Risk

Bentonville’s growth has been extraordinary over the past decade. Corporate campuses, luxury developments, new subdivisions—the city has expanded rapidly. But with that rapid growth comes a very specific plumbing challenge: hard water.

Bentonville sits on limestone geology. Water that flows through limestone picks up calcium and magnesium—the minerals that make water “hard.” And hard water isn’t just a problem for your appliances and fixtures. It’s a long-term problem for your pipes.

When hard water flows through copper pipes, it gradually corrodes the inner wall of the pipe. This process—called pitting corrosion—creates small holes that eventually break through the pipe wall entirely. It’s slow, and it’s invisible until the damage is done.

The newer your home’s copper plumbing, the less this applies. But in Bentonville’s original housing stock, and even in homes built in the early 2000s before PEX pipe became standard, copper pipes under the slab are quietly being attacked by the water that runs through them.

Beyond hard water, the rapid development in Bentonville has caused soil shifting in some areas. Ground settlement—especially in newer developments built on previously undeveloped land—puts stress on the pipes below. Pipes flex under pressure, stress accumulates over time, and eventually, a crack forms.

Signs of a Slab Leak in Your Bentonville Home

The earlier you catch a slab leak, the simpler and less expensive the repair. Here’s what to watch for:

Unexplained water bill increases. This is the most common first sign. If your usage habits haven’t changed but your bill is climbing—even slowly—something is losing water somewhere.

Warm or hot spots on your floor. If your hot water line under the slab is leaking, the escaping hot water warms the concrete above it. You’ll feel it as warm patches on tile or hardwood flooring.

Sound of running water with everything off. Turn off all fixtures, appliances, and water-using equipment. Go to your quietest room. If you can still hear the faint sound of water running, there’s a leak somewhere in your system.

Cracks in your walls or flooring. Water saturating the soil beneath your slab can cause it to shift or heave, leading to cracks in your foundation, flooring, or drywall. This is a serious sign—don’t ignore it.

Low water pressure. A supply line leak means the water pressure that should reach your fixtures is being lost underground instead. You’ll notice it especially when multiple fixtures run at the same time.

Wet spots or mold near the base of your walls. Water migrates. A slab leak will eventually find its way up.

How We Detect Slab Leaks Without Destroying Your Home

This is where technology has changed everything.

Old-school slab leak detection meant guessing where the leak was and jackhammering concrete until you found it. We don’t work that way.

At Benjamin Franklin Plumbing of Rogers, we use advanced non-invasive detection methods before we ever touch your floor:

Electronic leak detection. We use electronic amplification equipment that picks up the sound of water escaping through a pipe breach. Water under pressure makes noise—a hiss, a trickle, a vibration—and our equipment isolates that sound and pinpoints the source.

Thermal imaging. Infrared cameras detect temperature differences in your flooring. A leaking hot water line under the slab shows up as a heat signature that our cameras can map precisely.

Pressure testing. We isolate individual sections of your plumbing system and test pressure to confirm which line is leaking and narrow down the location.

The combination of these methods lets us identify the leak location precisely—often within inches—before we begin any repair. That means less destruction to your flooring, less disruption to your home, and a faster repair.

Slab Leak Repair Options

Once we know exactly where the leak is, you have repair options. What makes most sense depends on the age of your pipes, the type of material, the number of leaks, and your long-term plans for the home.

Spot repair. We access the specific leak point, cut through the concrete, repair or replace the damaged pipe section, and patch the concrete. This is the most targeted and often least expensive approach. It makes sense if you have isolated damage on otherwise healthy pipes.

Pipe rerouting. If the damaged section is in a difficult location—under a load-bearing portion of the slab, for example—it can be more practical to abandon the leaking section and reroute the line through the walls or ceiling of the home. No slab demolition at all.

Full repiping. If your pipes are old, extensively corroded, or have experienced multiple leaks, spot repair is a band-aid on a larger problem. Repiping the home—replacing all the under-slab lines—is the permanent solution. It costs more upfront, but it ends the cycle of recurring leak calls.

We walk every customer through these options, explain the pros and cons of each, and let them decide based on their situation and budget. No pressure, no upselling.

The Cost of Waiting

I want to be direct about this because it matters: slab leaks don’t get better on their own.

A pinhole leak that’s barely detectable today is a saturated subfloor and foundation damage six months from now. The water bill that’s crept up $40/month will double if the leak grows. And the mold that’s growing inside your wall because you haven’t found the moisture source yet is a health and remediation problem that costs far more than a plumbing repair.

The sooner you call, the simpler the fix.

What to Do If You Suspect a Slab Leak

Don’t wait for the problem to announce itself loudly. If you’re seeing any of the signs above—rising water bills, warm floors, the sound of running water with everything off—call us.

We’ll schedule a time to come out, run our diagnostic process, and give you a clear answer: either there’s a leak and here’s what we found and what we recommend, or there isn’t and here’s what might be causing your symptom.

That diagnostic visit doesn’t leave you guessing. It leaves you with facts.

Call us at (479) 579-9976 or book online 24/7. We serve Bentonville, Rogers, Fayetteville, Springdale, and all surrounding NWA communities.

For more plumbing insights for Bentonville and NWA homeowners, visit our blog at www.benjaminfranklinplumbing.com/nwa/blog.