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.
Garage door rough opening forum.
Step 1 measure the old door if you are replacing an existing door with one of the same size or the new door of choice if you are building a new garage.
The rough opening of a garage door should be 3 inches wider than the door itself.
Next you will need to know your door height.
99 of the residential garage doors that we run across are different than these widths.
Next your rough opening height should be 1 5 inches taller than the door.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
The garage door rough opening.
So if your door is 9ft wide your rough opening should be 9ft 3 inches.
If you are installing a 9 wide door the opening will be 9 3 wide.
If you are installing a 9 wide door the opening will be 9 3 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.
After that we nail a 2x jamb on the sides and the top of the r o.
A 16 door gets a 16 3 rough opening.
After this you just need to bring in the opening size to the exact size of the garage.
An 8 door gets a 8 3 rough opening.
Standard garage doors in our area are 8 9 16 and 18 wide.
Most vertical track systems with torsion springs or other hardware require 3 3 4 in.