"Scott" wrote in message
...
Thanks for your replies! I have another questions - can the fact that
moisture is appearing between the panes (where the gas used to be), be
demonstrative that the insulation is actually gone? The temperature is
starting to drop here, so I would like to know if I will be spending money
to heat the yard!

Not as bad as just a single pane, but not as good as a sealed pane.