How to measure your door
WHEN MEASURING YOUR DOOR FOR AN EXTERNAL, INTERNAL AND
Take your tape measure and measure on the inside top left hand corner of the opening to the inside top right hand corner e.g. brick to brick, and write down your measurements, then do the same again but at the middle of the opening and the same goes for the bottom, now when measuring the height of your opening, measure from the inside bottom left of the opening to the inside top left of the opening and then for the right hand side measure from the inside bottom right of the opening to the inside top right of the opening, once you have got all your measurements type them into the correct boxes on the right hand side.
Please note that if you do not have any other access to your garage other than from the garage door then you will need an external release kit for incase of emergency e.g. power cut.
It’s always good to measure twice as you do not want to order the wrong size door.