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