Detection of Leakage Defects in Building Envelope Structure by Infrared (IR) Thermography

Detection purpose

Infrared (IR) thermal imaging cameras are used to detect leakage defects of building envelope structures or components, which can find and locate leakage areas on the inner surface of buildings and building envelope components or precisely locate leak points, and evaluate the detection results.

Detection principle

Infrared (IR) imaging, a non-destructive testing technique for buildings, is ideal for identifying wet spots in building envelopes or moisture that has accumulated inside building components or materials. Infrared imaging captures a 2D image of the surface temperature of a building envelope, which can reveal anomalies in temperature variation , which can indicate the presence of moisture as the building cools down after being subjected to thermal loads. Because water in a building conducts and stores heat better than most building materials, when the building envelope cools, damp areas cool slower than dry areas, and this shows up in thermal images for "hot spots".

Reference Standard

GB/T 29183-2012 General technical requirements for construction site inspection by infrared thermography

JG/T 269-2010 Infrared Thermal Image Inspection Requirements for Buildings