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Repairing the Bottom of a Bifold Door They're a great way to save space, but they can be frustrating when they begin to lose their grip and scrape the floor. The good part is that these issues are usually fixable by making a few minor adjustments. If your bifold doors are scratching on the floor, it could be due to a broken track or worn roller. The solution is to replace the damaged rollers. Bottom pivot Over time the pivot at the bottom of a bifold door may become loose or even fall out. This usually happens