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How to Replace Bifold Doors Many home improvement stores offer bifold doors in kits that include doors, the track for installation and hardware. The kits you purchase should have a total dimensions that are about an inch smaller than the size of the opening that is framed. If your bifold doors squeak open, it could be because of a an unreliable guide pin on the top sliding track or if the floor pin on the bottom is out of place or not there. These problems are easily and inexpensively fixed. Cost Bifold d