Retractable Single Patio Screen Doors
The back door is normally the highest use door on the home. A screen is not always required, so why would you ALWAYS want to be opening and closing two doors? You don't.
When a vanishing screen is installed, it is only there when you want to keep the flying insects out. When barbequing, only one hand is required to open and close the vanishing screen door. The other hand can be used to carry the plate of food without notice.