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.
Garage door rough opening height.
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.
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.
Ordering a garage door based on a rough opening size can leave you with a door that is too big.
99 of the residential garage doors that we run across are different than these widths.
A garage will need backroom that equals the door height plus 18 inches and possibly more based on the installation of an automatic garage door opener.
Measure your rough opening a width by b height size door you need note.
The size chart of a double garage door measures out to 12 x 7 feet 14 x 7 feet and 16 x 7 feet.
Have more than one vehicle.
Height of rough opening.
The height of the rough opening would be the height of the garage door plus the thickness of whatever you are putting underneath the header in addition to the thickness of the mortar etc.
If garage door height extends above the opening the headroom measurement should be adjusted proportionately.
Words like rough opening are thrown around and i m not sure if we are speaking about the same thing.
Door height plus 18 is required.
Measure area labeled backroom 6 distance is measured from the garage door opening toward the back wall of the garage.
Well then ask yourself what size are double garage doors.
In our business we refer to rough openings as the size of the opening before the finished lumber has been added to the jambs.
Standard garage doors in our area are 8 9 16 and 18 wide.
When you build a garage make it bigger as well as the rough opening so it can accommodate bigger vehicles.
Measure opening in feet and inches.
Next you will need to know your door height.
It should be obvious that you don t use twice the thickness for the height since you will not be putting anything on the floor but you have been reminded.
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.
Determine clearance areas refer to the height chart below for minimum.
To make my.
Measure the backroom the distance from the garage door opening to the back wall of the garage.
Determine bracket mounting surface areas refer to the height chart below for minimum areas required for your door to operate correctly.
To put it into perspective if the garage door is let s say 8ft tall make the height of your opening 8ft 1 5 inches tall.