Universal Windows & Doors, LLC specializes in the development of modified and custom products (doors and windows) designed to satisfy the requirements of the historical market. The firm is based in Marlborough, Mass. It caters to the commercial, institutional, residential and architectural market. Some of the products Universal Windows & Doors, LLC offers include single security screens, single hung, double hung, casement, steel replacement and sliders as a range of series. It also provides custom architectural shapes as per the clients needs.