[stealthn]

Thanks guys, these are aluminium clad double pane glass with I assume argon gas. There are no leaks/drafts around the frames. They have been fine every year up to this one. No fog, condensation, etc. wall right beside window is fine. I read that most windows will only last 15-20 years.

I don’t know the make but I will look.

If they need replacement my concern is around the windows as we have stucco. I was here everyday when the house was built so I know it was done right.