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Repairing the Bottom of a Bifold Door They're a great method to reduce space, but they can be a pain when they begin to lose their grip and scratch the floor. These problems are easily fixable by making a few minor adjustments. If your bifold doors are scratching on the floor, it could be due to a broken track or worn roller. The solution is to replace the damaged rollers. Bottom pivot In time the bottom pivot can loosen or even drop off. This is typically caused by cracks or breaks in the wood p