How to Prepare an Opening to Replace Bifold Doors It's important to select the correct bifold doors when you're looking to replace your old doors. Make sure they're properly sealed and weatherproofed to stop water infiltration, air leaks and lower temperatures inside. For a smooth installation, have a partner help https://bi-folddoorrepair59290.tokka-blog.com/30932656/5-killer-quora-answers-on-bi-fold-repairs