In Russia, do you usually use double or triple glass in the windows for insulation? Single glass seems impossible for somewhere so cold!! Here in England, single glass is the rule although many people are adding double glass.
Yes. Double or triple glass is the only glass used here for insulation. Nobody will ever use single glass here.

The bad thing about it is that in the autumn they sometimes wait too long before they turn it on, so you would like to use the heating but it is not available...
Another bad thing about it is that in the spring they don't turn it off too long. When it became warm outside it became too hot inside.