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How to Replace Bifold Doors Many home improvement stores offer bifold doors in kits that include the doors, the track for installation and hardware. The kits you purchase should have a combined width that is approximately one inch less than the width of the opening that is framed. If your bifold doors squeak open, you may have a loose guide pin on the top of the sliding track or if the floor pin at the bottom is out of the way or not in place. The problem can be solved eas