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Tips For Window Hinge Replacement Hinges are an essential part of windows and door. If they are not well maintained, they could cause problems over time. There are some simple things you can do to increase the efficiency of window hinges and prolong their life. Start by determining whether your window is side hung (handle at the bottom of the frame) or top hanging (handle at the top). Find the track's outer width and hinge thickness. Check the Hinges The hinges of casement, awning and hopper windows are vital