If you are installing a 9 wide door the opening will be 9 3 wide.
Garage door framing opening size 8 x 6 6.
Ideally 2 x6 is the most used header size.
If garage door height extends above the opening the headroom measurement should be adjusted proportionately.
Measure area labeled backroom 6 distance is measured from the garage door opening toward the back wall of the garage.
The height of the rough opening would be the height of the garage door plus the thickness of whatever you are putting underneath the header in addition to the thickness of.
Framing nails are highly recommended.
Install the header on top of the trimmers and nail.
The height is 80 which is considered 6 8 or 6 8 add 2 1 2 to the actual door height and frame it 82 1 2 high.
Additional back room may be required for automatic garage door.
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.
After installing the jambs your garage door opening should now be the same size as the garage door.
Use 2 inch lumber for the jambs as well and ensure they are appropriately nailed to the door opening with the help of a nail gun or hammer.
The width of the lumber should be between 6 and 8.
Cut the header from 2 x 12 lumber and to a length of the rough opening plus 6 inches.
Nail or screw 2 x 6 jambs to the framing on the top first and then the sides of the rough opening.
6 3 r value insulated white garage door 2 layer 25 gauge steel frame construction with insulation raised panel details provide a classic look.
Door height plus 18 is required.
Classic collection series 8 ft.
So if you have a bedroom door that is 30 wide which is considered a 2 6 or 2 6 door just add 2 to the width and frame it 32 wide.
Step 1 measure the old door if you are replacing an existing door with one of the same size or the new door of choice if you are building a new garage.
Width of garage door opening standard widths are 8 9 10 12 14 16 17 and 18 height of the garage door opening standard residential heights are 7 7 6 8 header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.