In a single hung window, you have an upper and lower sash just like a double hung window, but in a single hung window, you can only open the bottom panel of the window. The top panel is fixed in place and remains stationary. Single hung windows are becoming more common in new homes and offices because they look great, they are less likely to leak, and they are more affordable. Single hung windows are an excellent option for your home. If you need single hung window repair, you can call us at Smooth Sliders.