T-Ripper.Com Drywall, also known as plasterboard or gypsum board, is a panel made of gypsum plaster pressed between two thick sheets of paper. It is used to make interior walls and ceilings. br br Plasterboard panels are also known as wallboard (USA, UK, Ireland),[citation needed] Gibraltar board or GIB wall and ceiling linings (in New Zealand, trademark of Winstone Wallboards[1]), rock lath,[2] Sheetrock (a trademark of USG Corporation), Gyproc (in Australia, India and amongst French Canadians, a trademark of Compagnie de Saint-Gobain). br br The sheets of the drywall can be made from fiberglass instead of paper to prevent mold growth. Mold growth is common when using paper-based plasterboard that has been exposed to water due to plumbing leaks or floods.