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Repairing the Bottom of a Bifold Door Bifold doors are fantastic for saving space however, they can be frustrating when they begin to bow or scrape against the floor. These issues are easily fixable by making a few small adjustments. If your bifold doors are scraping on the floor, this could be 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 become loose or even fall off. This is often caused