1 2 or 1 in one direction of the other will won t typically cause you to have to shop for a non standard garage door size.
Rough opening for 9x7 garage door.
Nail or screw 2 x 6 jambs to the framing on the top first and then the sides of the rough opening.
If it s 9ft the opening must be 9ft 3 inches and so on.
Cut the header from 2 x 12 lumber and to a length of the rough opening plus 6 inches.
The rough opening is equal to the size of the door but you need to figure back head and side room before choosing and installing the new garage door.
How to measure the finished width and height use of 2x4s for the sides and header.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
99 of the residential garage doors that we run across are different than these widths.
After installing the jambs your garage door opening should now be the same size as the garage door.
For instance if the width of the garage door is 8ft the rough opening should be 8ft 3 inches wide.
Standard garage doors in our area are 8 9 16 and 18 wide.
The rough opening should be the same size as the door.
Take these measurements to your local installing dealer or retailer to purchase the clopay garage door that is right for you.
Therefore making the width of the garage door rough opening the same size as the door would be fine if you are going to use a thin layer of stucco vinyl siding or 1 by lumber.
9 3 wide for the width and 7 11 2 for the height.
Width of rough opening the width of the rough opening should be 3 inches greater than the width of the garage door you are purchasing.
Install the header on top of the trimmers and nail.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
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.
However if you are putting bricks thick river rock stones marble or anything else on both sides that is more than 1 thick you will want the rough opening the same.
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.
Next you will need to know your door height.
How to frame a garage doors opening in this case 9ft wide by 8ft tall.
This would allow you to frame and wrap and apply the door seal around the outside of the door after it is installed with 2 x 4 or 6 boards.