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.
Pole barn garage door rough opening.
Standard garage doors in our area are 8 9 16 and 18 wide.
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.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
If you are installing a 9 wide door the opening will be 9 3 wide.
Next you will need to know your door height.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
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.