The term "stucco exterior" refers to a type of plaster that is applied to the outside of a building as a finish material. Stucco is made of sand, water and cement, which are mixed together and then applied in several layers to create a smooth surface. It is often used for its durability, fire resistance, and ability to be painted or colored to match the desired appearance. When referring to an entire exterior wall, "stucco" can also refer to the final finish of the plaster application process, which includes a scratch coat, brown coat, and sometimes a third coat (the fine coat) for added smoothness.