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Repairing the Bottom of a Bifold Door They're a great method to save space, but they can be a pain 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 could be due to a damaged track or worn roller. The solution is to replace the damaged rollers. Bottom pivot In time the bottom pivot can loosen or even be able to fall off. This is typically due to cracks or a broken wood piece where the