How To Measure Garage Door Height. These will become the measurements for the door ordering size plus the frame legs and headroom required to accomodate the door and frame overall width and height. Typical garage door w idths are 8, 9, 10, 12, 14, 16, 18 or 20 feet but custom doors can be made in 1 inch incrememnts.
To measure the height of your garage door, measure from the ground where the garage door rests to the horizontal jam board at the top of the opening. This is the second number used in the size dimension. So, a double garage door 16 x 7 would be 16 feet wide and 7 feet high for example.
Measure the height of the opening at the highest point.
Measure the height of the opening at the highest point. Now that you are prepared and ready to measure the garage door. Measure the height of the opening at the highest point. 8 feet wide by 7 feet tall, or 9 feet wide by 7 feet tall for a single car garage door.