Beam- A long piece of wood or steel that supports your roof. Cornice- The overhanging part of the roof that sticks out your walls. Coverage- The degree of weather protection offered by a roofing material. Most common are asphalt shingles, wood shakes, metal roof, tile or slate. Decking or Sheathing -Normally plywood which provides a flat surface covering your home. Dormer- A gabled extension protruding from a sloping roof to allow for a framed window. Dormers are essentially