Drywall, also known as gypsum board or wallboard, is a building material used for interior walls and ceilings. It is made from gypsum plaster and is sandwiched between two sheets of heavy paper or fiberglass mats.

Drywall is typically installed by cutting it to size and screwing it onto wood or metal studs using drywall screws. The seams between the sheets of drywall are then covered with joint compound and tape, sanded down, and painted or textured to match the surrounding surfaces.

Drywall is a popular building material because it is relatively inexpensive, easy to install, and provides a smooth, flat surface for painting or wallpapering. It also has good fire resistance and can help reduce sound transmission between rooms.

Common problems with drywall include cracking, sagging, and moisture damage. These issues can be caused by a variety of factors, such as improper installation, inadequate support, or water leaks. Proper installation and maintenance can help prevent these problems from occurring.

Minor damage to drywall can be repaired using joint compound and tape, while larger holes or cracks may require replacement of the affected area. Repairs should be sanded and painted to match the surrounding surfaces for a seamless finish.