Make sure that the size of the opening matches the size of the door.
How to install a 9 by 7 garage door.
The position of the header and back jambs are very important.
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.
High by 16 ft.
High by 8 or 9 ft.
Measure the various areas where the door will be installed.
A standard double garage door is 7 ft.
Standard single doors are 7 ft.
Door opening height and width headroom from top of opening to ceiling and back room length of garage.
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 header must be flush on the same plane with back jambs.