This style of window has a single sash that is hinged on one side of the window and projects outward. Modern casement windows either have hidden hinges and are equipped with a crank mechanism to move the window open, or they have a push-out style lock where the user unlocks the window and pushes it open. Quality windows will have a sequential or multi-point locking system to lock the window in multiple places along the side of the frame. Loewen casement windows offer the best sound ratings and thermal ratings available in a wood window. Windsor casement windows feature a sash set back in the frame with a great exterior muntin detail. Both brands feature extruded cladding for extra strength!