A comment
He moved to a new panel house, the windows were installed by the developer, but their quality left much to be desired, since they practically did not keep the heat and the temperature in the apartment, because of this, was constantly falling.
Tired of this "window disgrace", I decided to put normal plastic windows. On the advice of a comrade (he is engaged in finishing work), he put in plastic windows from Aluplast, with high-quality fittings from the German manufacturer Rotto. Since I live on the 3rd floor and the side of the house is not leeward, I set up a single profile. Take a larger profile did not make sense. Now, if there was a side apartment, then a wider profile is needed.
I have been using these windows for 3 years now, for the entire period of operation, I could not find more than one sign of marriage. I am very pleased with them, condensation does not form on them, they keep heat very well, for all the "severe" severe winters, the windows have never frozen, and most importantly, the price of the windows is quite affordable. Very happy with my purchase!
pros
Excellent windows, keep the heat very good.