Thermal Imager Delta-T Reference

Typical surface-temperature differentials for moisture, insulation, and electrical hotspots.

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Formula and source

(reference page; no compute) Thermal-imager delta-T interpretation: compare inspected component temperature against an unloaded reference of the same construction; ≥ 1 °C above reference flags moisture migration, ≥ 5-10 °C flags an active issue per IR-imaging engineering practice.

ASTM C1153 (Standard Practice for Location of Wet Insulation in Roofing Systems) by name; FLIR / Fluke published thermography training materials.

Audience

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Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.