To install a chair rail choose the molding you would like to use. You can use tape to see where you would like the chair rail to be, this will help you visualize it. Generally, you will want it 30-36′ from the floor.You can miter the corners if you choose. Paint the molding before you install, if you choose. Use finishing nails to secure the molding to the studs in the wall. Cover nail holes once they are below the surface (use a nail set for this) and touch up the paint. You can panel, paint or wallpaper below the chair rail if you choose.