A window device with a cementitious board as a frame material the device being a single or double window apparatus with an exterior configured with a cementitious board or structure and configured with such frames that are easily formed and readily adaptable to substantially any size or shape opening. The cementitious board window allows for a low maintenance, paintable or pre-painted panels that are moisture and rot resistant, are not susceptible to pest, and provide a surface which is durable over time, is non-combustible, and has materials with little environmental impact. The device is used with new or replacement windows for a commercial or residential structure.