External plastering is a finishing technique applied to the outside walls of buildings. It involves spreading a mixture of cement, sand, and water over the wall surface to create a smooth, protective layer. This layer helps to shield the structure from weather elements, such as rain and wind, while also enhancing its appearance. The process of external plastering typically includes preparing the wall surface, applying a base coat, and finishing with a top coat. This technique not only improves the durability of the walls but also allows for various textures and colors, making it a popular choice in construction and home improvement.