CHI Overhead Doors. The 5000/5100 Series Pan-Overlay Carriage House door features accent battens in white, over a woodgrain-embossed steel base available in white, almond, or sandstone. Model 5100 includes 13/8-inch polystyrene insulation with a 6.62 R-value. Several options are available for the doors, with optional glass or faux windows. One set of stamped decorative hardware is standard. Old World wrought iron designs are also available. 217.543.2135. www.chiohd.com.