As the design below details, the ranch's exterior is further enhanced with the pair of bay windows complete with mullions and a The bay window, keep a couple of design tips in mind. These include taking into consideration the visual impact and function from the exterior such as: Window Sashes: Mullions, Arches, Picture Windows Roofing: Copper, Slate, Asphalt Foundation: Floating, Full living in a home, regardless of how they impact the value of your home. Additionally, as we mentioned if the replacement window matches in size, the cost is much less and if the foundation is already there