The casement window is the most popular style of window, lending itself to virtually any application. The versatility of the system means that you can choose the positioning of the opening sashes to best suit your needs. A casement window has sashes that open out on special hinges that use friction to keep them open in the position you choose. Because this type of window opens out and has a rebated sash which lips over the outerframe they offer superb protection against the wind and rain. They can be used to replicate any popular style of timber window with sashes that can open from the side or the bottom.