https://wizdomz.wiki/wiki/9_Wh....at_Your_Parents_Teac
How to Prepare an Opening to Replace Bifold Doors If you're planning to replace your bifold doors, it's important to choose the right ones. Be sure that they are sealed and weatherproofed to prevent air leaks, water infiltration, and colder indoor temperatures. To ensure a smooth installation, have a helper. The kit you choose should have a width that is 1/8 of an inch less than the framed opening and between 1 and 2 inches smaller in height to allow for proper clearance for the floor. Choosing the rig