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How to Replace Bifold Doors Many home improvement stores sell bifold doors as kits that include the door panels, track for installation and hardware. The kit you purchase should have a combined width that is approximately one inch less than the width of the opening frame. If your bifold doors are creaking open, you may have an unreliable guide pin on the top track or the floor pin at the bottom is not in place or is not there. These problems are easily and cheaply fixed. Cost Bifold doors provide a s