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.
How to frame a 9x7 garage door opening.
So if your door is 9ft wide your rough opening should be 9ft 3 inches.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
It s essential to get this measurement right else your newly purchased garage door won t fit the opening or might actually be smaller than the opening.
If the door is 7 tall frame the opening 7 1 5.
These trimmers should be.
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.
The garage door rough opening.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
Next your rough opening height should be 1 5 inches taller.
Cut four 2 x 4 trimmers to this length and nail two each to either side of the rough opening.
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.
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.
If you are installing a 9 wide door the opening will be 9 3 wide.
The rough opening of a garage door should be 3 inches wider than the door itself.
Frame the rough opening for the garage door to 3 inches wider than the garage door you have selected.