The exercise is entirely non-invasive, so the software will make assumptions on the insulation properties of various elements of the property based on age and construction type. The assessor has the ability to over-ride these assumptions if visual or written evidence is provided to support the presence of insulation which may have been subsequently installed.
The exercise involves no physical intrusion; thus, the software infers the insulation characteristics of various components of the property according to their age and structure. However, the assessor has the authority to disregard these inferences if there is visual or written evidence indicating the presence of previously installed insulation.