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Repairing the Bottom of a Bifold Door They are a great way to reduce space, but they can be a pain when they start to slide and scratch the floor. These issues can be easily solved by making a few small adjustments. If your bifold doors are scraping on the floor, this could be 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 may loosen or even drop off. This is usually caused by cracks or a br