i was under the impression that all (vinyl) double pane windows were constructed using a gas such as argon between the panes. i need to replace all of my old aluminum double pane windows, about half of which have leaked and have interior fogging (condensation).
HOWEVER, one of the local companies here, uses a VACUUM between the double panes, instead of ARGON.
my question is: wouldn't a vacuum be more likely to leak moisture inside, over time, than a double pane window constructed using an inert gas inside?