Drywall

Made from gypsum (naturally occurring form of hydrated calcium sulphate) pressed into sheets and covered on both sides with thick paper, it is used in the construction of interior walls and ceilings. It is then usually painted or covered with wallpaper or panelling. Other ingredients may be added to make drywall more resistant to sound, water or fire. It is also called plasterboard, gyprock or gypsum board.
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