Drywall, also known as sheetrock or gypsum board, is a construction material typically used to create walls and ceilings. It consists of a layer of gypsum pressed between two sheets of heavy paper and is manufactured in large panels. These panels are cut to size and fastened to a structure's framing using nails or screws. Drywall is relatively lightweight and easy to install, making it a popular choice for both residential and commercial construction. It is often less labor-intensive and can be installed more quickly than plaster, resulting in a lower cost.

Plaster, on the other hand, is a mixture of gypsum, lime, or cement with water and is applied in several layers over a lath (a supporting structure) to create walls and ceilings. The plastering process is more labor-intensive, requiring skilled artisans to carefully apply and smooth the material. While this often results in a more solid and aesthetically pleasing finish, it can be more expensive and time-consuming to install than drywall. Plaster walls are also more resistant to dings and scratches and can provide better sound and fire insulation, but repairing them can be more challenging than fixing drywall.