Systems and methods are described for securing structures with moveable components. A structure may comprise a plurality of panes. A sensor device may be disposed on a pane of the structure. The sensor device may determine a position of the pane. A computing device in communication with the sensor device may receive, from the sensor device, an indication of the position or state of the pane. The computing device may determine, based on the position or state of the pane, a state of the structure.