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.
How to frame wide garage with doors at eaves.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening.
Shedding rainwater away from siding and trim especially from door and window sills can greatly reduce rot mildew and a host of other problems that can be caused by water streaming down the face of the building.
How to measure the finished width and height use of 2x4s for the sides and header.
Eaves and rakes that overhang a building s sidewalls are critical to the life of a building.
If you are installing a 9 wide door the opening will be 9 3 wide.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
Cut a piece of trim to that measurement.
How to frame a garage doors opening in this case 9ft wide by 8ft tall.
Measure across the top of trim on the outside of the door from the outside corners of both pieces of vertical trim that you just nailed on.