What type of finish is referred to as "exposed aggregate"?

The term "exposed aggregate" specifically refers to a concrete finish that reveals the individual stones or aggregates within the surface. This technique involves removing the top layer of cement paste to uncover the stones, providing a durable and aesthetically pleasing surface. This type of finish is commonly used in driveways, walkways, and patios because it combines both visual appeal and traction.

In contrast, a polished concrete surface aims for a smooth, shiny finish, which is quite different from the texture created by exposing aggregates. A final finish on roofing materials typically does not relate to aggregate as it focuses more on the application method or material types used on roofs. Similarly, a textured wall surface could refer to various techniques unrelated to aggregate exposure, such as stucco or coating applications that create a decorative finish rather than highlighting the natural elements of the concrete itself. Thus, the definition of "exposed aggregate" aligns precisely with revealing the stones within a concrete matrix, making it the correct choice.