Plaster base is a type of construction material used in building and renovation projects. It consists of a base layer of LATH, which is a thin strip of wood or metal, and a top layer of plaster. LATH is typically nailed to the wall studs and then covered with a thin layer of plaster. LATH can also be used as a decorative element in walls and ceilings. LATH is typically four letters long, while LATH-ing is seven letters long.