Divide the height evenly by three.
Making your garage door taller.
I would also go a few feet taller this would allow for a taller mudroom whose roof would actually clear the edges of my back door.
Raising garage door height.
That means if you do want to raise the height of your door you may need to raise the roof line of your entire garage.
Measure the width and height of the door opening.
Make three panels each measuring the width of the door by the height obtained in step 2.
So if you have a 7 foot tall garage door the depth of your garage shouldn t be shorter than 7 and a 1 2 feet.
Knock the garage down and build a new one that is slightly bigger.
If your garage isn t detached and is built within the main structure of your house you will likely find raising the roof line to be either impossible or so cost prohibitive that it isn t worth the investment.
Cut the legs of the racks a few inches.
It s only a small increase in size but it would give me enough room for a work bench my tools and a car.
We ll make a 12 foot 3 7 meter wide and 9 foot 2 7 meter high door opening.
If your home can accommodate a larger garage door and you d like one make sure to get a track extension kit with your garage door opener.
How to measure the finished width and height use of 2x4s for the sides and header.
Wall extensions because garage doors are usually sized to snugly fit the dimensions of the garage itself making the door larger usually means making the garage larger.
You answered the question yourself.
How to frame a garage doors opening in this case 9ft wide by 8ft tall.
Maybe go from my current 13x22 to a 15x24.