What about the glass though? Surely that’s not as safe? Well, cast all those mental images of bricks smashing windows into a thousand pieces aside. The majority of modern patio doors and French doors are fitted with double glazing as standard, which is far stronger than single pane glass. The space between the panes acts as a shock absorber and most double glazing is treated to be tougher. It is still possible to break, but it takes a remarkable amount of effort. If you wish, it can be given a laminate upgrade too, which means it won’t shatter into pieces if it does break, but instead, hold together in a similar fashion as a car windscreen.