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Repairing the Bottom of a Bifold Door Bifold doors are great space-savers however, they can be frustrating when they begin to slide or scratch against the floor. These issues can be easily solved by making a few small adjustments. If your bifold doors are scraping on the floor, this could be due to a broken track or worn roller. The solution is to replace the damaged rollers. Bottom pivot Over time the pivot pin at the bottom of a bifold door could be loosened or even fall off. Th