Saturated insulation under a Salt Lake City commercial roof is invisible from the surface - and in a freeze-thaw environment, it does not stay contained to where it entered. Infrared thermography maps wet insulation before you open the roof, so your recover-versus-replace decision is based on data rather than assumption.

Wet roof insulation in a Utah freeze-thaw climate is a more urgent problem than in gentler markets. Polyiso insulation that is saturated from repeated snowmelt intrusion will freeze and expand through the winter cycling season, progressively degrading the insulation's structural integrity and accelerating corrosion of the metal deck below. By the time ceiling staining is visible inside, the insulation assembly may have been freezing and thawing for two or three complete seasons. The only way to understand the extent of damage before opening the roof is to scan it thermally or pull cores across the affected area.

We operate a FLIR thermal camera on Salt Lake City commercial roofs on evening walks - typically 45 to 90 minutes after sunset - when the roof membrane has cooled and wet insulation retains heat longer than dry insulation, producing a detectable thermal signature. In the SLC market, the optimal scanning window runs from May through September, when daily solar loading is sufficient to charge the thermal differential the scan depends on. Winter scanning is less reliable in Utah's cloud-cover and inversion conditions, though post-storm assessments in April and October can produce useful results when the day before the scan had direct sun.

Infrared scanning is a planning tool, not a final answer. We pair it with core sampling: the thermal image identifies suspect zones, the cores confirm moisture content and verify the read. For recover-versus-replace decisions on Wasatch Front warehouse and office buildings - particularly those that have come through a heavy snow season and are showing interior staining - this combination consistently delivers more accurate scope than visual inspection alone, and at a fraction of the cost of full open-roof discovery.

When Infrared Scanning Is the Right Tool

Pre-recover decision on post-winter damage: Before committing to a recover versus full replacement on an aging roof that may have taken on snowmelt moisture, an infrared scan tells you how much of the existing insulation is dry and recoverable. Utah's freeze-thaw conditions mean wet insulation under a recovered membrane will continue to freeze and expand - a recover over wet insulation is not a viable scope here the way it might be in a warmer-climate market. The 25 percent threshold applies: if more than a quarter of the roof reads wet, replacement with full wet-area tear-out is the honest scope.

Post-storm or post-freeze-thaw-season assessment: After the Wasatch Front's heavy-snow seasons - the 2022-2023 season being the most recent example of a year that moved many roofs from inspection status to emergency assessment - infrared scanning identifies membrane compromise that may not be visible as an obvious seam failure. Water entry through micro-fractures in aged EPDM under sustained snow load is particularly well-suited to infrared detection.

Pre-sale or pre-refinance documentation: Buyers and lenders increasingly request infrared moisture scan reports as part of commercial roof due diligence on Utah investment properties. We produce signed, dated scan reports with thermal images and a written moisture boundary summary for this purpose.