Fair enough. I've not seen vinyl degradation due to the sun with that type of appearance, however I'm in WI not AZ. Suffice it to say that the sun that we see here isn't quite as damaging as yours.coinmls wrote: ↑Tue Jun 21, 2022 10:05 pm @HomeSealed: No, the windows will not clean up. You cannot clean the discoloration which again, correlates to areas hit hardest by the sun (less or no discoloration for windows that get less or no sun). Doing some light Googling other Internet users indicate that the vinyl is breaking down.
Not to belabor the point, but have you actually attempted to clean it or are you just assuming that they won't be able to be cleaned? If you have, what was used? I wouldn't go bonkers spraying harsh solvents all over, but again, scrub with some mineral spirits and fine steel wool in an inconspicuous location just to see what you get. That's not going to void a warranty. Any installer that says he's never had to do the same to clean off some foam or caulk excess is a liar.
Its not out of the realm of possibility that there could be some airborne contaminants that have caused that (as opposed to the sun) as another possibility. Also, fwiw, most manufacturers have language excluding uniform fading and discoloration due to weathering, and also due to environmental contaminants as well. Hopefully you are able to determine the cause and find a fair solution either way.