The term 'undersides of overhangs' can be summarized as soffits, which is a seven-letter word. Soffits are the underside of any structure that projects out from a wall, such as an overhang or a roof eave. They are typically made of wood, vinyl, aluminum, or fiber cement and are used to protect the exterior of a building from water damage. Soffits also provide ventilation for attics and other areas of the home.