How does the inspector check the roof?

When safely possible, the inspector will directly get onto and walk the roof. If that is not possible, such as if the roof pitch is too steep or the roof it wet or icy, a visual inspection from the ground is performed. Especially when the roof is wet, any leaks will also be visible from the underside of the roof when the inspector is checking over the attic. The roof decking is always checked like this from within the attic, regardless of weather.