Infrared Moisture Survey in Nampa, ID

Timing matters because the method depends on temperature difference. A scan works best on a clear, calm evening following a sunny day, when the roof has absorbed heat and begins releasing it. Wind, recent rain, standing water, and heavy cloud reduce contrast and raise false readings. The survey log records air temperature, cloud, wind, surface condition, and the time of each pass, so a reader can judge how much weight the images deserve.

Roof type also matters. Ballasted roofs, heavily graveled built-up roofs, and roofs with reflective coatings hide or distort the heat signal, and the surveyor may favor a meter grid instead of a camera. The scope names the method for each roof section and gives the reason, so the owner does not pay for a technique that cannot work on that surface.

The scan is done in a grid so each part of the roof is covered once. The surveyor walks the roof with a thermal camera, marks apparent anomalies with paint or tape, and photographs both the thermal image and a visible-light image of each marked area. Large areas can be assisted by a drone-mounted thermal camera for screening, with the walking survey then confirming the marked zones.

Marks are entered on the roof plan with numbers. Each number carries a thermal image, a visible image, and a status: suspected, confirmed wet, or cleared. By the end of the survey, the plan shows every anomaly and what happened to it, so no marked area is left without an answer.

A core cut removes a small circular sample through the membrane and insulation so the surveyor can see the assembly layer by layer. The sample shows the insulation type and thickness, whether it is wet, whether the deck is sound, and whether the wetness is surface condensation or saturation. A meter reading is taken in the opening, a photograph is made, and the hole is patched with a matching membrane and sealed the same day.

The number of cores depends on the roof. Enough are taken to confirm the edge of each wet area and to test a few dry-looking spots as controls. Core results are recorded with location, assembly, and moisture reading, and they are what turns a suspected anomaly into a finding the owner can use to approve or reject a larger scope.

The survey map shades the roof into wet, suspect, and dry zones, with the measured edge of each wet zone drawn from the cores. A map with one tight wet zone around a drain or curb tells the owner a local repair can work. A map with scattered wet zones along seams suggests water entering at laps, and the repair becomes a seam program. A map with wet insulation across most of a section sends the discussion toward recover limits or replacement.

The map also guides cost. Replacing only the wet insulation, to a boundary the survey proved, keeps dry board in service and shortens the tear-off. Drawing that boundary without a survey leads either to removing board that did not need to go or to leaving wet board under a new membrane. The same insulation and cover board choice is made on measured quantities.

The valley's wet months run November through May, and in winter, inversions and snow cover leave some valley sites colder than the thermometer at the Boise airport. Snow cover blocks thermal scanning, and frozen moisture in insulation does not read the same way as liquid water. For that reason, surveys are best scheduled in the dry warm season or in clear windows between thaws, and a survey done in winter is labeled with its limits.

Where the building has an active leak in winter, a meter-based survey and targeted cores still work, since they do not rely on solar heating. The report states which method was used and which areas could not be scanned until conditions improved.

The survey is most useful when a decision is large. A buyer examining a building as part of due diligence gets a measured account of wet insulation before the price is set. An owner with a long leak history gets proof of whether the leaks share a cause. A manager weighing a recover gets the moisture limits the code and the manufacturer require.

The east quadrant plan places the Gateway commercial district near light and heavy industrial areas, and the south quadrant plan describes the railroad as the boundary between east and south. Buildings in the Gateway District and along the rail corridor mix commercial and industrial uses, and the survey gives each roof, whatever its use, the same kind of measurement. On a built-up roof, moisture can sit between plies, and the core cuts show it.

The north quadrant plan lists food processing, healthcare, retail, and industrial uses near I-84, and the moisture question is worth settling early for any of those uses. Under a roof serving a food or clinical use, wet insulation is more than a roof problem, since moisture that reaches the ceiling can disturb interior cleanliness rules. The survey is scheduled with the facility contact, and the cores are cut and sealed in a sequence that keeps production areas protected.

Does infrared find leaks?

It finds heat patterns that often come from wet insulation, which can be near a leak or far from it. Core cuts confirm the pattern, and the repair follows the confirmed wet area rather than the image alone.

Which roofs resist a thermal scan?

Ballasted roofs, heavily graveled roofs, and roofs with reflective coatings hide the heat signal. On those, the surveyor uses a meter grid and core cuts, and the scope names the method for each section.

How many core cuts will the survey need?

Enough to confirm the boundary of each wet area and to test a few dry-looking spots as controls. The number depends on the roof, and each cut is patched and sealed the same day.

Can the survey be done in winter?

Partly. Snow blocks scanning, but a meter-based survey and targeted cores still work. The report marks which areas could not be scanned and when they should be revisited.

What does the owner receive?

A roof plan shaded for wet, suspect, and dry zones, thermal and visible images of each marked area, the core results, the survey log with weather conditions, and a short written scope that limits tear-off to the proven wet insulation.