Slab Leak Detection in Littleton, CO

Slab leak detection is the process of finding exactly where a pipe is leaking under a concrete floor without breaking it open first. We combine three tools — pressure testing to identify which line is leaking, acoustic listening to hear the escaping water, and thermal imaging to see heat patterns from hot-water leaks — to mark the leak on your floor, usually within about a foot.

Accurate detection is the single biggest factor in what a slab leak costs you. A plumber who guesses opens the wrong spot, then opens another. We locate first, then talk repair.

How does slab leak detection work?

1. Meter check. With every fixture off, we watch the water meter's leak indicator. A spinning dial confirms water is leaving the system somewhere.
2. Isolation and pressure testing. We separate the hot side from the cold side, and where possible individual branches, then pressurize each with a gauge. The line that loses pressure is the leaking one.
3. Line tracing. We map the pipe's path under the slab with a locator so we know where to listen.
4. Acoustic listening. A ground microphone amplifies the hiss of water escaping under pressure. The sound is loudest directly above the leak.
5. Thermal imaging. For hot-water leaks, an infrared camera shows the warm plume spreading through the concrete.
6. Marking and report. We mark the spot on your floor and walk you through what we found, with photos and readings.

Which detection method is best?

Each tool has strengths and blind spots, which is why we use them together.

What about PEX lines?

PEX is quieter than copper when it leaks and does not carry a tracing signal. We lean more on pressure isolation, thermal imaging and, where possible, injecting a tracer gas that rises through the concrete at the leak point.

What about drain leaks?

Drain lines are not under pressure, so acoustic methods don't apply. For those we use a camera — see under-slab sewer line repair.

What are the warning signs of a slab leak?

Most homeowners call us because of one of these, often two at once:

• A water bill that jumps with no change in habits, or a water meter that keeps spinning with every fixture off
• A warm or hot patch on tile, vinyl or carpet — the classic sign of a hot-water line leak
• The sound of running water when nothing is on, often loudest at night
• Damp or musty carpet, lifting laminate, cupping hardwood or efflorescence (white crust) on a basement floor
• New cracks in the slab or in drywall near the floor
• Low water pressure at one fixture or across the house
• A water heater that runs constantly, or a sudden jump in your gas bill

Can you check for a slab leak yourself?

You can do the first test at home in ten minutes:

1. Turn off every faucet, appliance, irrigation zone and ice maker.
2. Find your water meter — often in a pit near the street or in the basement — and look at the small leak indicator dial.
3. Wait 10–15 minutes without using water. If the dial moves, water is leaving the system.
4. Check toilets for running (a drop of food coloring in the tank shows up in the bowl if the flapper leaks) and look for dripping outdoor spigots.
5. If the meter still moves with toilets and outside fixtures ruled out, call us. That is the point where professional detection pays for itself.

How much does slab leak detection cost in Littleton?

What happens after we find the leak?

You get a clear explanation and a written price for each realistic repair option, whether that is a spot repair, a reroute or epoxy lining. There is no obligation to book the repair with us, and the location report is yours to keep for your insurance claim.

Why detection matters so much in Littleton

Many Littleton homes have finished basements with carpet, built-ins and tile over the slab. Every unnecessary opening means more flooring torn up and more cost. Precise detection keeps the repair small. It also matters for insurance: adjusters often want to know the leak's exact location and cause.

Why do slab leaks happen in Littleton homes?

Littleton's housing stock tells most of the story. A large share of homes went up during the building boom of the 1960s through the 1980s, and many of them have copper water lines buried in or under a concrete floor — a basement slab, a garage slab, or the slab of a ranch or split-level that sits on grade. Newer subdivisions on the south and west sides were often plumbed with PEX, which fails differently but can still be damaged under concrete.

• Expansive clay soil. Much of the Front Range sits on clay that swells when wet and shrinks when dry. That seasonal movement pushes and pulls on pipes locked in concrete, and fittings and bends take the strain first.
• Abrasion. A copper line that rests against gravel, rebar or the edge of the slab vibrates every time water flows. Over decades it rubs a hole through its own wall.
• Water chemistry and age. Pinhole corrosion from the inside is common in older copper. Once one pinhole appears, others along the same run often follow.
• Freeze-thaw and construction defects. Lines that run near an exterior wall, a crawl-space transition or a poorly bedded trench are more exposed to stress.

What's in our leak detection report?

You get a written summary you can keep and share with your insurer:

• Which line is leaking — hot, cold, branch or drain — and how we confirmed it
• Pressure readings and meter observations
• The marked location on your floor, with photos
• Likely cause, such as corrosion, abrasion or a failed fitting
• Repair options with written prices

Why not just call a general plumber?

Many general plumbers do excellent work on fixtures and water heaters but don't own acoustic and thermal locating equipment, or don't use it every day. Without it, the common approach is to open the floor where the leak "probably" is. Each wrong guess adds concrete, flooring and time. Detection is the part of a slab leak job where specialization saves the most money.

Common false alarms we rule out

Plenty of "slab leaks" turn out to be something simpler, and finding that out is part of good detection: a toilet flapper leaking silently, an irrigation valve passing water, a water softener stuck in regeneration, a humidifier line, or a dripping hose bib. We check these first, so you never pay for slab work you didn't need.

Slab leak detection FAQ