Final answer:
The inspector is not required to determine insulation or vapor barrier in exterior walls during a home inspection.
Step-by-step explanation:
In home inspection, the inspector is not required to determine the presence of, extent or type of insulation or vapor barrier in the exterior walls. This means that when inspecting a property, the inspector does not have to assess the insulation or vapor barrier in the outer walls of a building.
The reason for this is that the exterior walls are not heated to the same temperature as the interior, and therefore counting only half the thickness of the walls is sufficient for the inspection process.
It's important to note that this does not mean insulation and vapor barriers are not necessary or important; it simply means that the inspector does not need to specifically verify their presence or assess their extent during a typical home inspection.