Abstract: A method of installation comprises providing at least two trim molding pieces and providing a molding block configured to be positioned over a joint between the end portions of the trim molding pieces and to fit substantially flush against the molding. The method includes forming a decorative profile on the front surfaces of the molding pieces and forming an inverse profile on the rear surfaces of the molding block. The inverse profile mirrors the decorative profile formed on the front surfaces of the molding pieces. The method further includes installing the trim molding pieces such that the end portions are positioned adjacent each other and form a joint and installing the molding block over the joint between the pieces. The inverse profiles on the rear surfaces engage flush with the decorative profiles on the front surfaces of the trim molding pieces.