DIY Bifold Door Roller Replacement The bifold roller is the most common failure point in internal folding doors. The issue can be fixed by using a simple DIY solution. The rollers are constructed of stainless steel and are impervious to breakage. They are simple to install with the included hardware. https://bifold-door-repair82761.wizzardsblog.com/30483919/the-ultimate-guide-to-bi-fold-door-repairs-near-me