Casement windows open to the outside and up to 90 degrees. The thickness of the frame is 69 mm and double glazing is used. Hinges are attached to both the upper and lower edge. Casement windows
are completed with Winlock hardware. Special safety hooks can be mounted to casement windows to ensure additional safety. The design of the window and hinge construction achieves a safe balance of
the sash even when the window is fully opened.