I just put some cheap film on my windows and haven't had any problems all winter.

Instead of spending a lot of money on insulating the windows, I used regular plastic wrap.

This film creates the effect of a "third glass", that is, an air chamber that keeps the heat inside the room. To be honest, I have already reduced my heating costs , I do not turn on the heating, because the air chamber serves as a kind of insulator.

Additionally, another advantage of using film