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.
Making your garage door taller.
Raising garage door height.
How to frame a garage doors opening in this case 9ft wide by 8ft tall.
You answered the question yourself.
One way to do it would be to get wall extensions for the entire the garage and then cut the roof of the garage off lifting it up to the height you want it.
Maybe go from my current 13x22 to a 15x24.
It s only a small increase in size but it would give me enough room for a work bench my tools and a car.
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.
The depth of your garage can be no less than 6 inches taller than your garage door.
Measure the width and height of the door opening.
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.
Divide the height evenly by three.
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.
Cut the legs of the racks a few inches.
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.
Knock the garage down and build a new one that is slightly bigger.
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.
We ll make a 12 foot 3 7 meter wide and 9 foot 2 7 meter high door opening.