What characteristic defines the IR thermagraph?

The characteristic that defines the IR thermograph as a viable method with different grades that is not destructive is rooted in its functionality and application within mold assessment and building diagnostics. Infrared thermography, or IR thermography, utilizes thermal imaging to detect temperature differences on surfaces without requiring any invasive procedures. This non-destructive aspect is critical because it allows for inspections to be carried out in various environments without damaging existing structures or materials.

By capturing thermal images, inspectors can identify areas of moisture intrusion, insulation deficiencies, and even potential mold growth without physical contact. This ability to assess conditions through thermal signatures enhances the efficiency and effectiveness of the inspection process, making it a valuable tool in mold assessment and building evaluations.

In contrast, the other choices highlight methods or attributes that do not align with IR thermography: some involve destruction or physical contact or pertain to chemical testing methods. Understanding how IR thermography works and its non-invasive nature helps clarify its significance as a preferred method in various inspection scenarios.