If you are installing a 9 wide door the opening will be 9 3 wide.
Garage framing requirements for door.
Solid wood door not less than 1 3 8 inches thick solid or honeycome core steel door not less than 1 3 8 inches thick.
To assemble the long garage wall framing components we will start with the 2 x 4 sole plate and top plate by laying lengths of 2 x 4 material side by side on the ground or garage floor.
From the final grade vinyl siding can be touching the ground and fiber cement can be within 2 in.
Double trimmers should be used for garage door headers considering the length and the weight they bear.
We are going to be marking the location of each stud on them simultaneously with a small framing square that is 1 1 2 wide.
Wood garage door framing sheathing and wood siding need to be 6 in.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
Four to 6 in.
Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
Garage doors operating with torsion springs require a minimum of 9 1 2 inches of headroom while doors using extension springs require a minimum of 4 1 2 inches of headroom.
The size of the garage door framing should equal the size of the door after the jamb is applied.
Frame the rough opening for the garage door to 3 inches wider than the garage door you have selected.
Header requirement 2 at minimum the header should be 12 wide with doubled 2 4 at opening and ceiling running the width of the door with a 2 4 in the center of the opening for the center bracket to attach to.
Measure the distance from the bottom plate of the wall to a point that is 1 1 2 inches higher that the garage door height.
Of base material laid down and compacted.