Chair rails divide a wall into two distinct areas.
Figure A Picture and plate rails are a quick way to add interest. Figure B Architectural Details Columns Cut birch plywood into the desired column width and height and attach together to make a long box. Add crown molding that's cut at a 45-degree angle. Finish with decorative beading a few inches below the molding. To end a chair rail at a window, cut trim at a 45-degree angle.