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Repairing the Bottom of a Bifold Door Bifold doors are fantastic for saving space, but they can be troublesome when they begin to bow or scrape against the floor. The good part is that these issues are often easy to fix by making a few minor adjustments. If your bifold doors are scraping on the floor, it is likely due to a broken track or worn roller. The damaged rollers need to be replaced. Bottom pivot In time the bottom pivot may loosen or even drop off. This is often due to a broken or cracked piec