Manufacturer of aluminum and vinyl windows for both new construction and replacement applications. Columbia markets to a 10 state area in the central United States to building contractors, building materials wholesalers and glass and door wholesalers in the residential and light commercial markets. We market: aluminum storm windows and doors, white vinyl and aluminum primary windows in single hung, double hung, fixed, casement, horizontal slider configuration, aluminum patio doors in bronze and white fins, and white vinyl patio doors, mirror closet doors, insulated glass lites, a great number of specialty windows such as half rounds, octagons, acrylic block, and garden Windows in vinyl and aluminum.