What is the term for the finish of concrete cast directly against a form?

The term for the finish of concrete cast directly against a form is known as an As-Cast Formed Finish. This finish occurs when the concrete is poured into a form and takes on the texture and characteristics of the surface of that form. The finish is a reflection of the casting process, maintaining the appearance of the material used for the forms, which could include wood, metal, or other materials that provide a specific texture to the finished surface.

When the concrete cures, the surface retains the impressions and texture of the form, which can result in varying aesthetics, often used in architectural designs for both structural and decorative purposes. This finish is ideal when the natural look of the formwork adds to the desired architectural effect in a project.

The other finishes mentioned, such as Exposed Aggregate, Hammered, and Smooth Finishes, involve different finishing techniques that alter the surface of the concrete after it has cured. Each of those techniques gives a unique appearance but does not apply to the surface left by the direct casting against the forms.