In Denver, hidden water leaks rarely show up where you can see them. Our office is on East Evans Avenue in southeast Denver, and our team works across the city. We find the source before anyone opens a wall or slab. Then you can choose the repair with facts in hand.
This page covers home leak detection for slab, wall, fixture, and supply line leaks. Denver sits on swelling clay soil that stresses slab lines, and the frost line runs 36 inches below finished grade. If the leak is under the concrete, see our slab leak detection page. To schedule a visit, contact USA Leak Detection or call (303) 953-8631.
How to Detect Where a Water Leak Is Coming From
- Turn off every fixture and appliance that uses water.
- Read the water meter. If it still moves, water is leaving the system.
- Check the visible spots first: toilets, the water heater, and hose bibs.
- If nothing shows, narrow the suspect area with listening and thermal tools.
- Mark the suspect line before any repair starts.
- If the leak is hidden in a slab or wall, call USA Leak Detection at (303) 953-8631.
Start With the Water Meter and Signs of a Hidden Leak
Shut off every fixture and read the meter. A moving dial means water is escaping somewhere in the system. You might notice a higher bill first, or hear running water when nothing is on.
Denver Water is mountain surface water stored in reservoirs, so the meter is the simplest first check. One thing we check next is the pressure regulator. A failing one can push too much pressure into the house. That pressure can blow out washers, supply connections, and water heater fittings.
Detection Methods Used to Pinpoint Where Water Escapes
We use listening, thermal imaging, and pressure testing to narrow the suspect line. Each one answers a different question: is water moving, where does heat show up, and does the line hold pressure. A smaller search area means fewer walls and floors get opened.
Some Denver homes have slab floors and basements, so these methods have to reach under concrete and behind finished walls. For lines that run behind walls, see our pipe leak detection page.
Denver’s Swelling Clay Soil Can Stress Slab Lines
Swelling clay and rock sit under all of the major Front Range cities, Denver included. The soil swells when it gets wet and shrinks in dry spells. On a slab home, that movement can stress the copper and PEX lines under the concrete. One pattern we check first is a dry stretch followed by heavy watering near the foundation.
A pinhole can open in a line that nobody can see. Colorado’s seasonal moisture swings make this far more common than in wetter states. The Colorado Geological Survey calls swelling soil one of the most significant, widespread, and costly geologic hazards in Colorado.[1]
Water Heaters, Supply Lines, and Fixtures Are Common Leak Points
Water heater connections, supply lines, and fixture valves are where leaks often start. Each one fails in its own way. Fittings loosen, lines wear out, and valves drip.
Older homes in Park Hill and Washington Park can still have galvanized supply lines, polybutylene runs, or Orangeburg-style sewer laterals. In newer areas like Stapleton (Central Park) and Green Valley Ranch, we check water heater connections and fittings first.
Denver Water averaged 105 mg/L total hardness in 2025, and that hardness builds scale on fixture valves and fittings. But a worn seat or scaled cartridge can drip and look like a leak. Separate it from a leak inside a wall before you open anything up. For dripping faucets, see faucet leak detection.
Hidden Leaks Cause Damage Long Before the Stain Shows
A leak inside a wall or under a slab can run for a long time before a stain appears. Water soaks into drywall, subfloor, and insulation. Then the moisture can feed mold. Early detection limits how much has to be dried and rebuilt.
Colorado’s seasonal moisture swings can stress fittings and slabs. So a small drip can change with the season. On most Denver calls, the first clue is a higher bill, a warm floor, or a musty smell. By the time a stain shows, the water has been running a while.
Insurance Coverage for Leak Detection Depends on Your Policy
Whether leak detection is covered depends on your policy wording and what caused the damage. Read the policy before you assume either way. Homeowners in Green Valley Ranch, Stapleton (Central Park), and across the metro should check coverage first.
Denver’s winter design temperature is 1 degree F. Hose bibs, exterior wall runs, and lines in garages or poorly insulated crawlspaces can freeze and split. What homeowners don’t realize is that freeze splits often show up on the first thaw, not during the cold snap.
Frequently Asked Questions
How Do You Locate a Water Leak in Your Home?
You locate a water leak by shutting off every fixture and reading the water meter. A moving dial means water is escaping, so the search narrows from there.
How Do You Detect Where a Water Leak Is Coming From?
You detect where a water leak is coming from by narrowing the suspect area with listening, thermal, and pressure checks.
How Long Can a Water Leak Go Unnoticed?
A water leak can go unnoticed for a long time when it runs inside walls or under a slab.
How Serious Is a Water Leak in a House?
A water leak in a house is serious when it hides behind walls or under a slab. Damage spreads before a stain shows.
Does Home Insurance Cover Leak Detection?
Home insurance covers leak detection when your policy includes it, so check the wording with your insurer.