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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 part is that these issues are usually easy to fix with a few simple adjustments. If your bifold door is rubbing against the floor, it's most likely due to a damaged track or a worn roller. The solution is to replace the damaged rollers. Bottom pivot Over time, a bifolding door's bottom pivot may loosen or even drop off. This is often due to a broken or cracked wood piece