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Serving Champaign County

Finding a leak that you cannot see

Locating concealed water leaks behind walls, under floors and in crawl spaces in Champaign and Urbana.

  • Storm runoff and flooding
  • Basement water
  • Burst and frozen pipes

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Leak Detection

Hidden Water Leak Detection: what it covers

Quick answer

Hidden water leak detection is the work of finding a leak that is inside a wall, under a floor or in a crawl space, using moisture readings, a thermal image and small test openings. A damp spot that does not dry after flooding is traced to its source before the wall is closed. Champaign Water Damage Restoration takes calls 24/7.

Hidden Water Leak Detection illustration for Champaign, IL

A damp spot that keeps coming back is one of the most common reasons for a water call, and one of the hardest to solve by looking. The wet patch on a wall may be a long way from the pipe that is leaking, and the pipe itself may be behind a finish that hides the water. A leak that is not found is a leak that will keep wetting the structure, and a repair that closes the wall too early hides the problem rather than fixing it.

The method is measurement, not guesswork. A technician takes moisture readings across the wall, the floor or the ceiling, compares them with dry areas, and uses a thermal image to see where the surface is cooler from water evaporating or moving behind it. Those tools narrow the search. A small opening is then cut at the point where the readings and the image agree.

A leak in Champaign or Urbana is found the same way as one anywhere else. The crew does not assume a source from the age of a building or its plumbing, because those are not facts it has. It follows the readings and the route the water appears to have taken.

Service area
Champaign & Champaign County
Availability
Phones answered 24/7
Warning signs

Signs you need hidden water leak detection

Do not cut into a wall or a ceiling yourself, because it can hide wiring, gas lines and pipes under pressure. Turn off the water at the main if a line is actively leaking. Do not use a thermal camera or a moisture meter in standing water near a live outlet. Keep children and pets clear of openings in the building.

  • A patch of wall or ceiling that stays damp after the surrounding area has dried
  • A stain that grows slowly over weeks with no obvious storm or spill
  • A musty smell in one room that does not go away with ventilation
  • A water bill that has risen without a clear reason
  • Cabinets or a vanity base that are soft or swollen in one spot
  • Peeling paint or a bubbling wall finish that returns after it has been painted
Our process

How our hidden water leak detection visit works

  1. Gather the history

    The crew asks when the damp was first seen, whether it has moved, what rooms are above and below, and whether the water bill has changed. Those answers narrow the search before any opening is cut.

  2. Take baseline readings

    Moisture readings are taken across the suspect wall, floor or ceiling and in a dry area of the same building. The difference between the two points shows where the moisture is.

  3. Scan with a thermal camera

    A thermal image shows surface temperature differences that can point to water behind the finish. The image is a guide, not proof, so the crew confirms it with readings and an opening.

  4. Open the smallest area that proves it

    A small opening is cut where the readings and the image agree. The cavity is read from inside, the pipe or the source is found, and the opening is kept no larger than the finding needs.

  5. Stop the source and confirm the drying

    The source is stopped or the plumber is told where it is. The cavity is then dried and read until the framing reaches the dry goal, and the log records each reading.

How do I know if I have a hidden leak?

Look for damp or stained patches that come back after they have dried, a musty smell in one room, a water bill that has risen, or a floor or cabinet that is soft in one place. Any of these is a reason to call for readings before the damage grows.

A hidden leak often shows first as a slow change rather than a flood. The paint blisters, the baseboard swells or the floor under a carpet feels cool. Note where and when you see each sign, because a pattern in time and place is useful to the crew.

Check the water meter with all taps and appliances off. If the meter moves, water is still running somewhere in the building, and that is worth reporting when you call.

Why is a thermal camera not enough on its own?

A thermal image shows surface temperature, and a damp surface can look similar to other causes of a temperature difference. The image is useful for narrowing the search, but it is confirmed with moisture readings and a small opening before the wall is repaired.

A cool patch on a wall can come from water, from air leaking through a gap or from a difference in the materials behind it. The crew uses the camera to choose where to measure and where to look.

A confirmed leak is one that the readings and the opening agree on. The crew reports what it found and what it did not find, so the repair is planned from evidence.

Should the wall be closed before the leak is found?

No. A wall closed before the source is found hides the leak and can trap moisture inside the cavity, where it can rot the framing or grow mold. The wall is closed only after the source is stopped and the cavity tests dry.

A repair that covers a damp area without finding the cause is a repair that will need to be done again. The crew records the readings that were taken before and after the opening, so the decision to close the wall is shown.

If a trade wants to close a wall before the source is confirmed, ask for the readings first. A closed cavity with a wet framing is the outcome this process exists to avoid.

Does a leak detection visit cost the same as a repair?

The detection work is priced by the time and the openings it takes to find the source, and the repair is priced separately by the trade that does it. No figure is given over the phone, and the scope is explained and approved on site before the openings are cut.

A leak that is found on the first opening is a smaller scope than one that needs several openings to trace. The crew explains how many openings it expects and why, before it cuts any of them.

The repair of the pipe or drain is a separate job for the trade that does it. The crew does not repair the source itself, and it tells you who should.

What if the leak is outside the house?

A leak in an underground or outdoor line is outside the building and is handled by the owner or the authority responsible for that line. The crew records the route the water took inside the building and tells you who to contact about the line outside.

Water that enters the building from outside can follow a line, a foundation crack or the ground. The crew reads where it appears inside, so that the outside work can be aimed at the right place.

Excavation and work on a public line require the authority that owns it, and they are not something this company performs. The crew will tell you who to ask.

Options

Types and options for hidden water leak detection

A leak in a supply line inside a wall

A pressurized supply line leaking inside a wall often shows as a damp patch that grows steadily. The crew uses a pressure check on the line where it can, and it opens the wall at the point where the readings are highest.

A leak in a drain line under a floor

A drain line under a floor or inside a wall can leak slowly and show as a stain low on the wall or a soft spot in the floor. The crew reads the floor and the wall base and traces the line route from the room below where it can.

A leak behind a cabinet or a vanity

A leak under a sink or behind a cabinet can run down the wall and wet the cabinet base. The crew removes the toe-kick or the back of the cabinet to read the source, and it reads the wall behind it.

Champaign County

Why hidden water leak detection is different in East Central Illinois

Homes and buildings in Champaign and Urbana have a mix of wall types, floors and crawl spaces, and each one moves a leak in its own way. The crew reads the framing and the route before it decides where to open a wall.

A leak in a building near the upper Embarras can be confused with water from the ground, since both can wet a lower wall. The crew checks the source of the water before it assumes a pipe, and it uses the readings to tell the two apart.

A leak that appears after a storm may have been there before the storm, and the storm simply made it visible. Keep a note of when the damp was first seen, so the crew can compare it with the rain record it is given.

Need hidden water leak detection today?

Call any hour and explain what is going on. You get a clear price before any work starts.

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FAQ

Hidden Water Leak Detection FAQs

Can you find a leak without opening the wall?

Sometimes the readings and the thermal image are enough to narrow the search, but confirming a leak usually needs a small opening. The crew keeps the openings as small as the finding allows.

Will the crew find a leak in the pipe itself?

The crew finds the route and the source of the water and records them. The pipe is repaired by a plumber, who will work from the opening and the readings the crew provides.

How long does detection take?

It takes as long as the search needs, and that depends on the building and the number of openings. The crew explains the plan on the first visit and does not promise a time.

Is a leak inside a wall covered by my insurance?

That depends on the policy and the cause, and the insurer decides. Many policies treat a sudden leak differently from a slow, long-term one, so check the wording with your insurer.

Why should the damp patch be checked even if it is small?

A small damp area can be the visible end of a wet cavity that is larger than it looks. Checking it early shows whether the water is still moving and how far it has reached.

What if the crew finds no leak?

The crew records what it measured and what it ruled out. A damp area that has no active source may be drying out, and the readings will show whether it is.

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