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How to Replace Bifold Doors Many home improvement stores sell bifold doors in kits that include the door panels, installation track and the hardware. The kit you purchase should have a combined width that is about an inch less than the size of the framed opening. If your bifold doors are squeaking open, it could be because of a a loose guide pin on the top sliding track or if the rotating floor pin at the bottom is not in place or is not there. These issues can be easily and inexpensively fixed. Cost Bifold