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Bi Folding Door Repair Tips Bi-fold doors enable you to completely open up your space and connect indoors with outdoors. They're ideal for letting in sunshine and fresh air but it's crucial to maintain them properly in order to prevent damage. There are a variety of problems with your bi-folding door. Fortunately, they're not difficult to repair! Cracked Pivot Pins You may have noticed that your bi-folding doors are scraping on the bottom, especially when you've added carpeting to your home