There are three types of common gypsum ceilings, which are gypsum suspended ceiling tiles, which are usually of several sizes, but the common size is often 60 * 60 cm, and Gypsum Board panels, which are usually of two sizes, 240 * 120 cm or 300 * 120 cm, and The third type is municipal gypsum or it is known by several names (Moroccan gypsum – water gypsum – Arabic gypsum..etc), and each of these types has a method of installation, defects, problems and features.