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How to Replace sell bifold doors as kits that include door panels, installation track and the hardware. The kit you purchase should have a total width that is approximately an inch less than the size of the opening frame. If your bifold doors are creaking open, it could be because of a a loose guide pin on the top of the sliding track or if the floor pin on the bottom is not in place or is not there. These problems can be fixed easily and cost-effectively. Cost Bifold doors provide a sleek and modern look