{i} plasterboard, sheet of plaster that usually sandwiched between two pieces of cardboard and is used in construction to cover interior walls or ceilings
Large sheets of compressed wood fiber, usually produced from lower quality stock, including chips and waste wood It is commonly used for subsurface flooring and walls in new home and building construction The various grades of wallboard include, among others, plywood, particle board, oriented strand board and medium density fiberboard