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Repairing the Bottom of a Bifold Door Bifold doors can be great for saving space however, they can be frustrating when they begin to slide or scrape against the floor. The good thing is that these issues are often easy to fix with a few simple adjustments. If your bifold doors are scraping on the floor, it is likely due to a damaged track or worn roller. The solution is to replace the damaged rollers. Bottom pivot In time, a bifolding door's bottom pivot can loosen