A roof projection is a feature of a building's roof that extends beyond the walls of the structure. The two most common types of roof projections are EAVE and OVERHANG. An EAVE is the edge of a roof that projects beyond the side of a wall, while an OVERHANG is a roof projection that extends beyond the wall on one or more sides. Both EAVE and OVERHANG provide protection from the elements and can be used to enhance the aesthetic of a building.