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Bi Folding Door Repair Tips Bi-fold doors allow you to fully open up a space and connect indoors with outdoors. They are ideal for letting sunlight and fresh air in, however they must be maintained properly to prevent damage. You may encounter a number of issues with your bi-folding door. Fortunately, they are usually easy to fix. Cracked Pivot Pins You may have noticed that your bi-folding doors are scraping across the bottom in the event that you've installed carpeting on your