Revisions log for Answer #1855

Our home builder says guaranteed such windows last 10 years, anything over that is a bonus. So you have to expect that they will have to be replaced at some point. In my parents house they have lasted 17 years now, now it's time.

Even if it rains, you should definitely be at home, or never leave the windows open. However, at least the ones I know have a ventilation function, so you can open an air slot even when the window is closed. If it's raining really hard, it's also wet there.

There are, I think, also fixed double-wing windows, so not to open, they probably last a little longer. We had them without shading because the rooms in which we had the windows were hardly used.

I would recommend shading/darkening in any case.