The rough opening is equal to the size of the door but you need to figure back head and side room before choosing and installing the new garage door.
Pole barn garage door rough opening.
99 of the residential garage doors that we run across are different than these widths.
The doors extend beyond the finished trim you see from the front a fact that must be taken into consideration when framing and preparing the area for installation.
1 2 or 1 in one direction of the other will won t typically cause you to have to shop for a non standard garage door size.
Next you will need to know your door height.
If you are installing a 9 wide door the opening will be 9 3 wide.
Standard garage doors in our area are 8 9 16 and 18 wide.
2x6 door mounting board adjusted based upon door manufacturer build make sure to leave enough turning radius for opening size and slab thickness door track radius can be between 12 and 18 depending on installation kit bracing overhead door rails in pole barn.