What are Single Hung Windows?
A single hung window is virtually indistinguishable from a double hung window. Both have an upper and lower sash, and just like a double hung, a single hung window is easy to operate and provides a traditional aesthetic. The primary difference is that the top sash does not operate on a single hung window, while both sashes operate on a double hung.
A single hung window could be an ideal choice in areas where a top sash would be hard to reach. Because the top sashed is locked in place, single hung windows prevent more air infiltration and are more energy efficient. Also, single hung windows can be less expensive than double hung windows.