Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
How to frame wide garage with doors at eaves.
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.
Frame the rough opening for the garage door to 3 inches wider than the garage door you have selected.
How to frame a garage doors opening in this case 9ft wide by 8ft tall.
If you are installing a 9 wide door the opening will be 9 3 wide.
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.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
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.
How to measure the finished width and height use of 2x4s for the sides and header.
Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.
Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening.