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Repairing the Bottom of a Bifold Door They are a great way to reduce space, but they can be a hassle when they begin to lose their grip and scratch the floor. These issues can be easily fixed with a few simple changes. If your bifold doors scrape on the floor, this could be due to a damaged track or worn roller. The solution is to replace the damaged rollers. Bottom pivot In time the pivot pin at the bottom of a bifold door could be loosened or even fall off. This is usually due to a broken