I bought some of the above to put on my west facing windows. I have a large stationary and 2 medium size casement windows, both double paned.
After installing outside, and getting ready to toss the box, I read that it shouldn't be installed on double paned windows.
Can someone tell me why? They may be double paned but they aren't the best and the clear plastic window film I have over them balloons out on the windy day.
thanks!