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Repairing the Bottom of a Bifold Door They are a great way to save space, but can be frustrating when they start to slide and scrape the floor. These issues are easily fixable by making a few small adjustments. If your bifold door is scratching the floor, it's likely due to a broken track or roller that is worn out. The solution is to replace the damaged rollers. Bottom pivot As time passes, a bifolding door's bottom pivot may loosen or even drop off. This is usually due to cracks or a broken wood piece where the pivot pin and anchor is. If yo