If your opening differs from this you may have to order a specialty door.
How to install a 9 by 7 garage door.
The header must be flush on the same plane with back jambs.
Measure the various areas where the door will be installed.
The position of the header and back jambs are very important.
High by 8 or 9 ft.
High by 16 ft.
Because the doors are so large few home centers and only some garage door stores keep many doors in stock so expect to order one instead of buying it off the shelf.
Garage doors come in standard sizes with most basic roll up single garage doors measuring about 7 feet 2 1 m tall and 9 feet 2 7 m wide.
For the headroom you should have about 10 to 12 of space depending on the spring system you re installing.
A standard double garage door is 7 ft.
Door opening height and width headroom from top of opening to ceiling and back room length of garage.