A bay window is when the fabric of the building forms the shape – ie brickwork that protrudes from the property and provides extra space in the building. A bow window is the formation of a curve shape by connecting a number of windows. This protrudes over the brickwork. With a bay window design, you can enjoy additional light and an extended view. A bow window enables the homeowner to incorporate more glass into the room due to the curve and can go a long way to making your room appear bigger and brighter.