Will the inspector walk on the roof?

Only if the roof is accessible with an approved ladder and conditions are considered safe should an inspector walk on the roof. Obviously, snow or rain on a pitched roof are not considered safe conditions on which to walk. Because of their brittle nature, wood shingles, slate and tile roofs are prone to damage if walked on. If there is a suspicious detail on the roof that causes concern, most inspectors will climb a ladder up to the eaves to get a closer look.