Exactly my experience. Triple-pane windows are great for thermal efficiency, but they're just one piece of the puzzle. If your insulation isn't up to ...

Had a similar mishap myself when insulating around some new windows last year. Thought I'd accounted for the expansion, but next morning... slight bow...

I tackled mine a couple years ago and totally agree about the primer—makes a huge difference. One thing I'd add is that while you're at it, it's worth...