Install the header jambs and center pad of the frame using a 2 x 6 lumber for the header jambs and center pad.
How to frame a 16 ft garage door.
Frame the rough opening for the garage door to 3 inches wider than the garage door you have selected.
Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening.
I ll explain the process more extensively as we proceed.
After they are plumb finish nailing the jamb board securely to the frame.
Using 16 penny nails attach the jamb boards at the top and bottom.
Leave at least 5 of space on the sides of the door.
If you are installing a 9 wide door the opening will be 9 3 wide.
Make sure the jambs are plumb by using a six foot level.
How to measure the finished width and height use of 2x4s for the sides and header.
How to frame a garage doors opening in this case 9ft wide by 8ft tall.
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.
If you are installing a 9 wide door the opening will be 9 3 wide.