DIY Bifold Door Roller Replacement The bifold roller is the most frequent failure issue in doors that fold internally. A simple DIY solution is available to fix the problem. The rollers are made of stainless steel and are resistant to breakage. They are simple to install with the included hardware. https://bi-fold-door-repair36639.targetblogs.com/31019461/10-real-reasons-people-hate-bi-fold-door-repairs-near-me