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Repairing the Bottom of a Bifold Door They're a great way to save space, but they can be a hassle when they start to slide and scratch the floor. The good thing is that these issues are usually fixable with a few simple adjustments. If your bifold doors scrape on the floor, it is most likely because of a damaged track or worn roller. The solution is to replace the damaged rollers. Bottom pivot As time passes, a bifolding door's bottom pivot can loosen or even be able to fall off. This can be due to a damaged