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.
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.
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.
Standard garage doors in our area are 8 9 16 and 18 wide.
99 of the residential garage doors that we run across are different than these widths.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.