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Bi Folding Door Repair Tips Bi-fold doors let you fully open up a space and connect indoors with outdoors. They are great to let the sun and fresh air in, but they must be maintained in a timely manner to prevent damage. There are a variety of common issues you might have to deal with when using your bi folding door. Luckily, they're easy to fix! Cracked Pivot Pins You may have noticed that your bi-folding doors are scratching on the bottom, especially if you've added carpeting to your home or changed