Thermography is one of the fastest growing forms of non-destructive testing in the roofing industry. Thermography is a method by which the thermal characteristics of a roof structure can be assessed, processed and then displayed in a visual way. A ‘thermogram’ or ‘thermal image’ can be likened to a picture created with heat, in the same way that a photograph is a picture created with light.

How does it work in practice?

IKO’s thermographic roof surveys work on a number of simple, yet fundamental principles:

During the day, a roof absorbs energy from the sun and also heat generated from within the building (Figure 1).

At night, the roof radiates energy but areas of the roof which contain moisture stay warmer for longer. This is true even of moisture trapped beneath a visually dry waterproofing membrane (Figure 2).

IKO’s state-of-the-art thermal imaging technology highlights these warm spots and helps pinpoint areas of entrapped moisture.