Abstract: A wall form assembly for receiving a flowable material that sets and hardens into a desired formation having an exposed outer surface is disclosed. The wall form assembly includes a detachable panel provided with cavity shaping discrete protrusions distributed in rows on an inner face of the detachable panel, each of the rows extending in a longitudinal direction and comprising at least two of the discrete protrusions, and a foam panel. A plurality of connectors removably attach together the detachable panel and the foam panel in opposed and parallel spaced relation along the longitudinal direction so as to create a form for receiving the flowable material. Advantageously, the detachable panel along with the cavity shaping discrete protrusions can be easily removed from the hardened formation, thus providing an exposed outer surface which is substantially smooth and free of projections having recessed cavities. A related method is also disclosed.