A slider window can open from one side or another, or from both. The window tracks are mounted on the bottom and top sills of the window opening to guide the two or more window panes when sliding back and forth.
A slider window may maintain its air-tightness for a longer period of time,and will also be far less likely to lose its ability to stay open than traditional vertical opening windows. Slider window can also be installed as a single pane of glass, or multiple panes.