FLIR InfraCAM User Manual page 129

A defect will usually produce a smaller temperature difference on the outside of a
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wall exposed to external air movement. However, missing or defective insulation
near the external surface can often be more readily indentified externally.
Publ. No. 1558299 Rev. a200 – ENGLISH (EN) – February 12, 2007
12 – Introduction to building thermography
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