double pane window

Just my 2 cents on double pane windows. We camp year 'round and in cold weather, double pane makes a huge difference in condensation (motorhomes are so closed up humidity goes up and a cold window will condense water or frost over). People who store their RVs all winter (and there are many) won't see any real advantage to double pane but will have to deal with the issue of eventually resealing them. Your preferred way of camping should dictate your window choice. I would think if they say 1/4 inch, that is going to be single pane. If you see tilt out windows, that's single. All double pane I have seen have been sliders.