The width of the rough opening should be 3 inches greater than the width of the garage door you are purchasing.
Rough in for 9x7 garage door.
Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening.
For instance if the width of the garage door is 8ft the rough opening should be 8ft 3 inches wide.
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.
If garage door height extends above the opening the headroom measurement should be adjusted proportionately.
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.
Door height plus 18 is required.
So if your door is 9ft wide your rough opening should be 9ft 3 inches.
If the door is 7 tall frame the opening 7 1 5.
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.
For residential homes 99 of doors are either exactly 7 or 8 tall.
Next your rough opening height should be 1 5 inches taller than the door.
Standard garage doors start at 7 tall and increase in increments of one foot.
You get the picture.
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.
When pricing your door you will need to price a garage door exactly the size of the opening so when calling around for price points be sure that you have this information in hand.
If you are installing a 9 wide door the opening will be 9 3 wide.
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.
The rough opening of a garage door should be 3 inches wider than the door itself.
Measure area labeled backroom 6 distance is measured from the garage door opening toward the back wall of the garage.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
Frame the rough opening for the garage door to 3 inches wider than the garage door you have selected.
Back framing the garage 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.
Additional back room may be required for automatic garage door.
These trimmers should be.