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Repairing the Bottom of a Bifold Door They're a great way to save space, but can be a hassle when they begin to lose their grip and scrape the floor. The good news is that these problems are usually fixable by making a few minor adjustments. If your bifold door is rubbing against the floor, it's likely due to a broken track or a worn roller. The solution is to replace the damaged rollers. Bottom pivot Over time the pivot pin at the bottom of a bifo