What Thermal Imaging Finds That Your Eyes Can't

The problems you can't see yet

The most expensive problems in a home often start out invisible. A slow drip inside a wall. A section of attic with no insulation. A bathroom that's been leaking under the tile for months.

By the time you see a stain, a soft spot, or a spike in your energy bill, the damage has usually been building for a while. Thermal imaging helps us find these problems earlier, often before there's any visible sign at all.

How thermal imaging works

A thermal camera doesn't see through walls. It reads surface temperature and shows it as a color image.

That's what makes it useful. Water, missing insulation, and overheating wires all change the temperature of the surface in front of them. A wet spot in drywall shows up cooler than the dry wall around it. An attic bay with no insulation shows up as a hot or cold patch on the ceiling below.

To the naked eye, the wall looks fine. Through the camera, the pattern is obvious, and it tells us exactly where to look closer.

Finding leaks before they leave a mark

This is where thermal imaging earns its keep. Many leaks are slow, and they can run for weeks or months before a stain ever reaches the surface. By then, there may already be rot or mold behind the wall.

With a thermal camera, we often spot moisture while the drywall still looks perfect. Common places we find it:

• Behind showers and tubs, where a failed seal lets water into the wall

• Under sinks and around toilets, at supply lines and wax rings

• Around windows and exterior doors after wind-driven rain

• On ceilings below bathrooms, laundry rooms, and upstairs plumbing

• Near roof penetrations, chimneys, and skylights

• Along basement walls where water is starting to seep in

When the camera shows a suspicious cool spot, we confirm it with a moisture meter. That way, a finding in your report is backed by more than a colorful picture.

Catching a leak early can be the difference between replacing a wax ring and tearing out a bathroom.

Spotting insulation gaps and air leaks

Colorado's big temperature swings make insulation problems easy to see on camera. In winter, a gap shows up as a cold patch on an interior wall or ceiling. In summer, it shows up as a hot one.

We regularly find:

• Attic insulation that was never installed, has shifted, or was disturbed during other work

• Exterior walls with missing or compressed insulation

• Drafts around windows, doors, outlets, and attic hatches

• Rooms over garages and bonus rooms that never seem to hold temperature

• Gaps in brand-new homes, where insulation was missed before the drywall went up

These gaps cost you money every month. They can also cause condensation, which leads to moisture problems and, in cold weather, ice dams on the roof.

Unlike a leak, an insulation gap usually isn't a reason to renegotiate. It is a great list of affordable upgrades to tackle after you move in.

What else it catches, and what it can't do

Leaks and insulation are the big two, but the camera also helps us find:

• Electrical hot spots. An overloaded breaker or loose connection can run hot long before it fails. One recent new-construction inspection turned up an electrical defect that only the thermal camera revealed.

• HVAC issues. Blocked ducts, disconnected vents, and rooms that aren't getting airflow.

• Radiant floor heat problems. Cold zones that show a loop isn't working.

Thermal imaging is a powerful tool, but it isn't X-ray vision. It reads temperature differences, so it works best when there's a difference to read. A leak that's dry on inspection day may not show up, and some wall materials hide patterns better than others.

That's why we use it alongside a full visual inspection and moisture meter, not instead of them.

Included with every Arrow inspection, at no extra cost

Many inspectors offer thermal imaging as a paid add-on. Some don't offer it at all. We include it free with every home inspection we do, because we think every buyer deserves to know what's behind the walls.

We also use professional FLIR thermal cameras, the same brand trusted by building scientists, electricians, and firefighters. When it comes to finding problems you can't see, the quality of the camera matters.

So when you're comparing inspection quotes, it's worth asking one question: is thermal imaging included, or is it extra?

See our thermal inspection page, schedule your inspection, or call (719) 687-1270.

Frequently asked questions

Do I have to request thermal imaging? No. It's part of every Arrow home inspection automatically.

Will I see the thermal images? Yes. Any thermal finding in your report includes the image alongside a regular photo, so you can see exactly where the issue is.

Does thermal imaging work on new construction? Yes, and it's especially useful there. It's one of the best ways to catch insulation the builder missed. See what we've found in BOLO: The Wildest Things We're Finding in Brand-New Homes.

Can thermal imaging find mold? Not directly. It finds the moisture mold needs to grow. If we see signs of moisture, mold testing can confirm whether mold is present.