When we’re inspecting a roof, we are looking at covering; fasteners; deck sheathing; slope and underlayment; ice barrier; drip edge; presence of an offset pattern; roof valley flashing; nail penetration into the deck sheathing; and flashing areas. When we are inspecting the roof covering, we will first check to see if there are multiple layers of shingles installed. Having multiple shingle layers isn’t bad, per se, but it does warrant closer inspection of certain areas of the roof. In particular, when a roofing layer is installed, the flashing must be redone.
The roof is a critical part of the inspection because it plays a major role in protecting the inside of the structure from weather and water, and repairs can be very expensive. It’s for these reasons that we are particularly diligent when inspecting a roof. This applies to the roof of the main structure and also roofing on any other structure on the property, such as a detached garage, a shed, or an outbuilding.