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Repairing the Bottom of a Bifold Door They're a great way to reduce space, but they can be a hassle when they start to slide and scrape the floor. The good news is that these problems are usually easy to fix with a few simple adjustments. If your bifold doors are scraping on the floor, it is likely due to a broken track or worn roller. The solution is to replace the damaged rollers. Bottom pivot Over time the bottom pivot can loosen or even drop off. This is usually caused by a damaged or damaged wood piece on which the pivot pin and anchor res