Cdeisel
I would respond with this. Maybe nothing, maybe everything.
Tempered glass expands and contracts according to heat/cold...That's why you see bubbled back glass window tint. Maybe a reason to use high quality/cast vinyl on those
windows so you don't have warranty issues.
I'm not pretending to be an expert on
signs, I am not. But I do like to be as informed as I can on aspects that keep me out of court/disputing anything with a customer. I'm only here to learn from everybody's post, I by no means claim to know it all. CP