https://dev.to/hubjuice5/what-....the-heck-is-replace-
https://www.openlearning.com/u..../kaspersenmcelroy-sm
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 existing doors. Make sure they are properly sealed and weatherproofed to avoid air leaks, water infiltration and colder indoor temperatures. To ensure a smooth installation, get a partner to assist. The kit should be one inch wider than the frame opening, and between 1 and 2 inc