A 8 x 7 feet door will be the perfect option for any mid size sedans and most of suvs.
Rough opening size for 9x8 garage door.
You should add 2 1 2 to the height of the actual door.
If the door is 7 tall frame the opening 7 1 5.
Nail or screw 2 x 6 jambs to the framing on the top first and then the sides of the rough opening.
If you are installing a 9 wide door the opening will be 9 3 wide.
After installing the jambs your garage door opening should now be the same size as 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.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
Install the header on top of the trimmers and nail.
Standard sizes standard garage doors in our area are 8 9 16 and 18 wide.
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.
Always consider the car dimensions while designing a door opening and choosing right size of the garage door.
Install the header jambs and center pad of the frame using a 2 x 6 lumber for the header jambs and center pad.
1 2 or 1 in one direction of the other will won t typically.
Getting the rough opening size right the first time will save you from frustration when installing your doors.
Cut the header from 2 x 12 lumber and to a length of the rough opening plus 6 inches.
Most vertical track systems with torsion springs or other hardware require 3 3 4 in.
Also make the rough opening 1 5 taller than the garage door.
This post is intended for purposes of clarifying how garage door sizes work and opening preparation.
Bigger trucks will fit in 9 x 8 doors with very few exceptions.
Leave at least 5 of space on the sides of the door.
This will give you room to space the door frame off of the sub floor.
Framing rough opening sizes are really quite simple.
Make the rough opening 3 wider than the garage door.
On each side although some systems can require up to 5 1 2 in.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
99 of the residential garage doors that we run across are different than these widths.
However the correct answer should be that you want the finished opening to be the same size or slightly smaller than the door so the rough opening will depend on what you are putting on the sides of the opening and underneath the header.
