•A typical CASEMENT window incorporates outward opening hinged windows of varying sizes and design and may also include a fixed pane. Outward opening hinged windows should have a window lock fitted on the window frame opposite the hinges and secured into the central stile or side of the outer frame. For windows over 3ft high or 3ft wide it is recommended that two window locks are fitted, one at the bottom and the other at the top of the window.

•SASH windows typically comprise of two frames that slide vertically over one another to open. To protect these windows it is recommended that sash bolts are fitted to secure the lower frame to the upper at either end of the mid intersection of the window when it is closed. Window locks can also be fitted on the side of both windows and secured into the main frame.

•SLIDING windows are similar to sash windows but are configured horizontally. As with sash windows, sliding windows can be secured with a locking bolt where the sliding frames overlap when the window is closed or by window locks sited at convenient points where the window meets the outer frame.