Measure the various areas where the door will be installed.
How to install a 9 by 7 garage door.
For the headroom you should have about 10 to 12 of space depending on the spring system you re installing.
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.
The position of the header and back jambs are very important.
Make sure that the size of the opening matches the size of the door.
High by 16 ft.
The header must be flush on the same plane with back jambs.
Standard single doors are 7 ft.
If your opening differs from this you may have to order a specialty 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.