A pilaster and panel combination is disclosed. The panel is adapted to be supported on a wall between the floor and the ceiling. The pilaster is made from an aluminum extrusion U-shaped in cross section and it has a recess between its spaced legs, and the pilaster is longer than the panel. The panel is received between the space legs of the pilaster at an intermediate part of the pilaster. Two trims strips are held in place between the legs of the U-shaped extrusion outboard of the panel. One strip extends from the panel to the floor and the other strip from the panel up to a head rail. The trim strips are held in place between the legs of the extrusion by a series of grooves and beads in the legs of the extrusion and the legs of the trim strips.