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.
Garage door rough opening forum.
The rough opening of a garage door should be 3 inches wider than the door itself.
A 16 door gets a 16 3 rough opening.
If you are installing a 9 wide door the opening will be 9 3 wide.
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.
On the inside of the jambs we nail 2x4 s around sides and top extending the sides up 1 we call them goal posts and that s what the garage door tracks get bolted to.
Next your rough opening height should be 1 5 inches taller than the door.
Standard garage doors in our area are 8 9 16 and 18 wide.
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.
After that we nail a 2x jamb on the sides and the top of the r o.
Next you will need to know your door height.
So if your door is 9ft wide your rough opening should be 9ft 3 inches.
An 8 door gets a 8 3 rough opening.
If you are installing a 9 wide door the opening will be 9 3 wide.
On each side although some systems can require up to 5 1 2 in.
After this you just need to bring in the opening size to the exact size of the garage.
The size of the door will be approximately the same as this sometimes called the rough opening next measure the sideroom or space available on the left and right sides of the opening.
The garage door rough opening.