The secret of the ceiling

A ceiling is the top surface of an interior building. Ceiling materials include gypsum boards, light steel keels, mineral fiber acoustic ceiling tiles and others. Ceilings can be painted in interior design to beautify the indoor environment and to install chandeliers, light pipes, ceiling fans, open skylights, install air conditioners, and change the effectiveness of indoor lighting and air circulation. It's a catch-all phrase for decorative interior roofing materials. Traditionally, straw mats, reed mats, and wooden boards were the primary building materials. More modern building materials have been used as science and technology have advanced.