Infrared Moisture Scanning — Commercial Roofs in Jacksonville, FL

Service

Moisture trapped in roof insulation is invisible from the surface but shows up clearly in post-sunset infrared thermography. We use thermal imaging to map wet insulation before tear-off, giving Jacksonville building owners a data-driven recover-versus-replace decision instead of a guess.

Jacksonville's combination of high annual rainfall, summer afternoon convective storms, and salt-air coastal humidity creates persistent moisture risk for commercial flat roof insulation. Wet insulation is invisible from the surface — a roof can look structurally sound, walk firm underfoot, and show no interior leak until saturated insulation has degraded significantly and begun promoting deck corrosion underneath. By the time an interior leak signals the problem, the insulation replacement scope is often larger and more expensive than an early detection scan would have found.

Infrared thermography identifies wet insulation by detecting the temperature differential between wet and dry areas. During the day, the entire roof mass absorbs solar energy. After sunset, wet insulation retains heat longer than dry insulation — the temperature difference shows as a bright anomaly in the thermal image. Scanning is performed one to two hours after sunset on clear evenings with sufficient daytime solar loading to create readable differentials. In Jacksonville's climate, the scan window is wide from April through October and narrower in the winter months when lower solar radiation reduces differential contrast.

We use thermal imaging as a decision tool, not a marketing service. The primary use case is recover-versus-replace scoping: if moisture core pulls indicate saturation in selected locations, an infrared scan maps the full extent of the wet area before any tear-off decisions are made. The second use case is capital planning — building owners who want to understand the full moisture condition of a large roof before committing to a replacement budget. The third is pre-sale or acquisition due diligence on commercial properties in the Jacksonville metro.

How Infrared Scanning Works in Jacksonville's Climate

The fundamental physics: wet insulation has higher thermal mass than dry insulation. After a day of sun loading, wet areas retain heat after sunset while dry areas cool rapidly. The infrared camera captures this differential as a false-color image, with wet areas appearing warmer (brighter) than dry areas. The scan is overlaid onto the roof zone diagram for the report.

Jacksonville's climate has two practical effects on scan planning. First, the scan must be performed on a dry day following at least one day of adequate sun loading — scanning immediately after rain when the entire roof surface is wet produces no readable differential. Second, the high ambient temperature and humidity of Jacksonville summers can compress the post-sunset scanning window, because the entire roof surface cools more slowly in humid conditions. We account for this in scheduling and confirm scan viability conditions before mobilizing.

The scan is not destructive. No membrane penetrations are made during the thermal imaging phase. We verify anomalies with spot moisture core pulls — typically three to five inch diameter plugs through the membrane and insulation — at flagged locations. Core pulls confirm whether the thermal anomaly is genuine wet insulation or a surface condition (residual moisture, HVAC condensate, mechanical equipment heat source) that can produce a false positive. Every thermal anomaly flagged in the report is verified by a core pull.

Recover vs. Replace: What the Scan Tells You

The primary economic value of an infrared scan is precise delineation of wet versus dry insulation areas before a tear-off decision is made. A building owner considering a TPO recover on a 60,000 square foot Southside office building — a scope that might run $200,000 to $280,000 — needs to know whether the recover path is viable before signing a contract. If 40% of the insulation is saturated, the recover traps moisture, voids the new manufacturer warranty, and produces a second failure in 3-5 years. The scan finds that before the contract is signed.

The Florida Building Code 25% rule adds a related planning dimension. Under FBC Section 1511, if more than 25% of a roof area is replaced or recovered in any 12-month period, the entire roof must be brought to current code. An infrared scan can identify whether a targeted replacement of wet areas will stay below the 25% threshold — allowing a phased replacement approach — or whether the wet area is large enough that full replacement is the code-required outcome regardless.