It all varies on what the exterior finish detail is.
What is the rough opening for a 8x7 garage door.
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.
To make my.
Many home builders do not consider this a structural necessity but a style and price choice for the homeowner.
Install the header on top of the trimmers and nail.
After installing the jambs your garage door opening should now be the same size as the garage door.
If opening will be perfectly level and plumb 1 2 to 3 4 smaller than door.
Many homeowners have two cars and need garage space to shelter them both.
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.
In our business we refer to rough openings as the size of the opening before the finished lumber has been added to the jambs.
The standard size for double garage doors is 16 feet wide and 7 to 8 feet high.
99 of the residential garage doors that we run across are different than these widths.
Also many garage door installers want 2x4 s nailed on the flat to the inside edge of the opening for the tracks to be fastened to.
If sides are not plumb consider a flush door instead of a raised panel to make it less obvious.
Many 16 x 7 garage doors will be designed with a pair of single 8 foot garage door bays separated by a central post or column.
Cut the header from 2 x 12 lumber and to a length of the rough opening plus 6 inches.
Ordering a garage door based on a rough opening size can leave you with a door that is too big.
Otherwise its done with 1x stock pvc or sometimes 5 4 lodgepole pine trim.
Nail or screw 2 x 6 jambs to the framing on the top first and then the sides of the rough opening.
Just add 2 to the width of the actual door size.
Next you will need to know your door height.
Make sure to allow for an uneven floor.
Framing rough opening sizes are really quite simple.
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.
At least two 2x4s on each side of the jambs but three would not hurt.
This will give you room to space the door frame off of the sub floor.
1 2 or 1 in one direction of the other will won t typically cause you to have to shop for a non standard garage door size.
You should add 2 1 2 to the height of the actual door.
Most garage doors openings i trim out get done simply with aluminum cladding but this is for cost.
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.
Getting the rough opening size right the first time will save you from frustration when installing your doors.