This video shows you how to correctly measure an entry way and determine which unique home designs security doors will.
How to measure for security door. Measuring for a new security screen door: Remove the old doorknob by unscrewing the two screws that hold it in place. Measure the top, middle and bottom widths of the screen door;
The lock side is determined from the outside looking in door widths: Measure from top to bottom on both sides of your door frame, outside the door looking in. Contents are all patio door handles the same size?
Deduct 10mm from the narrowest height, a bug seal can be attached to make up any gap.