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Bi Folding Door Repair Tips Bi-fold doors are an excellent option to connect your indoors with the outdoors. They are ideal for letting the sun and fresh air in, however they must be properly maintained to prevent damage. There are many common issues that you may encounter with your bifold door. Fortunately, they are easy to fix. Cracked Pivot Pins You might have noticed that the bi-folding doors of your home are scraping along the bottom when you've ad