Abstract: A trim piece for attachment to either an outside or an inside corner of a building for subsequently receiving and hiding the ends of a frieze board or siding panels, thereby providing a neat, smooth corner transition. Two inner flat surfaces converge at right angles to form a primary inner corner for abutting conformance with the building corner, and two outer trim elements defining respective two outer flat decorative surfaces converge at right angles to form an outer corner. Two mounting flanges extend in parallel with the respective inner flat surfaces, and are spaced parallel to and extend laterally beyond a respective outer trim element. The flanges and outer trim elements form a pair of vertical slots for receiving a frieze board or at least one siding panel.

Abstract: A trim element such as a door pilaster or frieze board, for attachment to a building wall, having front and back longitudinal faces, first and second longitudinal edges, and a longitudinal groove in the first edge. A mounting bracket for the wall has a forward strip that extends laterally and is selectively friction fit into the groove, a back strip that extends laterally on the back face of the element, and a connecting web between the forward and back strip that is flush with the first edge when the forward strip is fully inserted in the groove. A mounting flange for the wall extends laterally from the back face of the element, beyond the second longitudinal edge, and has a longitudinal channel along the second edge with a width that is effective to receive an edge of wall siding.

Abstract: A bracket for a trim unit generally comprising a back plate. The back plate has first and second longitudinal sides, each having an angulated leg projecting transversely at each side. The back plate has first and second back plate portions which extend longitudinally on opposite sides of a longitudinal axis defined intermediate the first and second longitudinal sides. First and second sets of fastening apertures are defined in said first and second portions, respectively. The back plate first portion is detachable from the back plate second portion along the longitudinal axis such that the first portion and the second portion are each separately attachable to a wall in laterally spaced relation with the angulated legs facing each other.