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Bi Folding Door Repair Tips Bi-fold doors allow you to completely open up your space and connect indoors to outdoors. They're ideal to let in sunlight and fresh air, however it's crucial to maintain them properly to avoid damage. There are a variety of common issues that you may encounter with your bi folding door. Fortunately, they are easy to fix. Cracked Pivot Pins You may have noticed that your bi-folding doors are scratching on the bottom, especially in the event