DIY Bifold Door Roller Replacement The bifold roller is the most common failure issue in doors that fold internally. The issue can be fixed with an easy DIY solution. The rollers are made of stainless steel and are resistant to breakage. They are easy to install with the included hardware. https://bifolddoorrepair50428.blogdigy.com/10-things-people-hate-about-bi-fold-door-repairs-near-me-45863119