Mercury-Excelum is a third-generation, family-owned and operated building products business. We manufacture - among other things - vinyl windows, vinyl fence, vinyl rail and aluminum storm windows. In addition, we distribute vinyl siding, composite decking, shutters, entry doors, patio doors and storm doors. We operate throughout New England and parts of southern and central New York.All of our products are thoroughly tested by independent laboratories whose results are certified by third-party agents. Most of our products are qualified for Energy Star labeling.