CiiLOCK Sashless Window Systems

Precision hardware for architectural sashless windows

CiiLOCK’s Sashless Window System is a coordinated hardware solution for vertically sliding sashless windows, combining clean architectural sightlines with smooth, counterbalanced operation. Unlike a conventional double-hung window, the moving glass can be designed without a visible sash frame surrounding each pane. The result is an operable window that retains much of the visual simplicity of fixed glazing while providing generous natural ventilation.

CiiLOCK provides the specialised motion, locking and operating hardware that makes the system function. CiiLOCK sash pulleys guide the counterbalance system and allow the glass panels to travel smoothly vertically. By counteracting much of the weight of the glass, the system allows comparatively large panes to be opened and positioned with significantly less effort than their actual mass would suggest. The result is the familiar functionality of a double-hung window without the prominent sash rails and framing normally surrounding the operable glass.

The Hardware Behind the Glass

The simplicity of a sashless window relies on a small number of specialised components working together. CiiLOCK combines counterbalance pulleys, discreet locking and operating hardware to create smooth vertical movement while keeping visible hardware to a minimum.