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Bi Folding Door Repair Tips Bi-fold doors allow you to fully open up a space and connect indoors to outdoors. They are ideal to let the sun and fresh air in, however they need to be maintained in a timely manner to prevent damage. There are several common problems you might face with your bifold door. Fortunately, they are usually easy to repair. Cracked Pivot Pins You may have noticed that the bi-folding doors of your home are scraping across the bottom if you've added carpeting to yo