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.
How to install a 9 by 7 garage door.
Standard single doors are 7 ft.
If your opening differs from this you may have to order a specialty door.
A standard double garage door is 7 ft.
High by 8 or 9 ft.
The position of the header and back jambs are very important.
Measure the various areas where the door will be installed.
Door opening height and width headroom from top of opening to ceiling and back room length of garage.
For the headroom you should have about 10 to 12 of space depending on the spring system you re installing.
Make sure that the size of the opening matches the size of the door.
A door of 9 x 7 2743 x 2134 mm needs an opening of 9 2 743 mm wide by 7 2 134 mm high.