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How to Replace Bifold Doors Many home improvement stores sell bifold doors in kits that include doors, the track for installation and the hardware. The kit should be about 1 inch smaller than the frame opening. If your bifold doors squeak open, you may have an unreliable guide pin on the top of the sliding track or if the rotating floor pin on the bottom is in a wrong the way or not in place. These issues can be easily and inexpensively fixed. Cost Bifold doors have modern and sleek design that can make