Rough opening for an over head door is the actual size of the door in this case 8 x 7.
10 x 8 garage door rough opening.
If you are installing a 9 wide door the opening will be 9 3 wide.
Leave a headroom of 14 or 12 minimum.
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.
Make the rough opening 3 wider than the garage door.
Use the diagram below to measure the rough opening for your roll up door or mini storage door.
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.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
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.
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.
Nail or screw 2 x 6 jambs to the framing on the top first and then the sides of the rough opening.
Many home builders do not consider this a structural necessity but a style and price choice for the homeowner.
Many homeowners have two cars and need garage space to shelter them both.
Jambs go in vinyl weatherstrip known in the garage door trade as a stop goes on last.
This is assuming that you are using a 2 x 6 or 2 x 8 to finish the opening.
These boards are 1 5 thick.
Calculate your measurements to the closest fraction of an inch to make sure you have an accurate door size.
After installing the jambs your garage door opening should now be the same size as the garage door.
Install the header on top of the trimmers and nail.
Frame a few houses with a carpenter and you ll see.
Install the header jambs and center pad of the frame using a 2 x 6 lumber for the header jambs and center pad.
Exact measurements are important to ensuring the correct fit and proper operation of your door.
If you are installing a 9 wide door the opening will be 9 3 wide.
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.
Also make the rough opening 1 5 taller than the garage door.
Cut the header from 2 x 12 lumber and to a length of the rough opening plus 6 inches.
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.