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Repairing the Bottom of a Bifold Door Bifold doors are fantastic for saving space, but they can be a hassle when they begin to bow or scratch against the floor. These problems can be easily fixed with a few simple changes. If your bifold doors are scratching on the floor, this is most likely because of a damaged track or worn roller. The damaged rollers should be replaced. Bottom pivot Over time, the bottom pivot of a bifold door could loosen or even fall out. This is usually caused by a damaged or cracked piece of wood where the pivot pin and ancho