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Repairing the Bottom of a Bifold Door They're a great way to save space, but can be a hassle when they begin to sag and scratch the floor. These issues can be easily fixed with a few simple changes. If your bifold door is rubbing against the floor, it's most likely due to a damaged roller or a worn track. The solution is to replace the damaged rollers. Bottom pivot In time the bottom pivot can loosen or even fall off. This is typically caused by a cracked or broken wood piece that is where the pivot pin and anchor is located. If you're experiencing this i