Mastering Roof Inspections: Metal Roofs part 2 was a helpful article illustrating the three different kinds of corrosion an inspector will most likely encounter. The climate zone will impact which type is most common to his inspection area.
The Roofing article is aimed at consumers, giving them helpful suggestions concerning maintaining their roof. It explains the different types of roofing material available to them. It provides suggestions as to how to go through the re-roofing process, selecting a roofing contractor, etc.