DIY Bifold Door Roller Replacement The bifold roller is the most common failure point in internal folding doors. The issue is easily fixed by using a simple DIY solution. The rollers are made of stainless steel and are impervious to breakage. They are easy to install using the included hardware. https://bi-fold-door-repair89434.blogminds.com/why-you-should-concentrate-on-improving-bi-fold-door-repairs-near-me-28110096