After installing the jambs your garage door opening should now be the same size as the garage door.
9 x 8 garage door rough opening.
If you are installing a 9 wide door the opening will be 9 3 wide.
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.
Next you will need to know your door height.
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.
A 8 x 7 feet door will be the perfect option for any mid size sedans and most of suvs.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
Install the header on top of the trimmers and nail.
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.
Always consider the car dimensions while designing a door opening and choosing right size of the garage door.
Measure opening in feet and inches.
The rough opening should be the same size as the door.
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.
A width by b height size door you need.
Single garage doors can be small enough for golf carts or large enough for tractors depending on your home or community for most homes the standard single car garage door is 8 to 9 feet wide and 7 to 8 feet high.
99 of the residential garage doors that we run across are different than these widths.
Standard garage doors in our area are 8 9 16 and 18 wide.
Determine bracket mounting.
Bigger trucks will fit in 9 x 8 doors with very few exceptions.
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.
Take these measurements to your local installing dealer or retailer to purchase the clopay garage door that is right for you.
Nail or screw 2 x 6 jambs to the framing on the top first and then the sides of the rough opening.
Measure the width and height 1 and 2 of your door opening in feet and inches to determine the garage door size you need.
These garage door dimensions.
If you are installing a 9 wide door the opening will be 9 3 wide.
Cut the header from 2 x 12 lumber and to a length of the rough opening plus 6 inches.
New construction frequently offers 9 x 7 garage doors but increasingly offers door widths of 10 feet.