uPVC windows look terrible and have made UK housing estates new and old become an eyesore.
They have their place if your on a budget, but until you can thin down the frame profile, and give them an attractive finish - why would anyone with even a tiny sense of design want them?
I'm out. But before I go I do want to say that I'm not trying to be a pain in the ass or troll, I genuinely have a dislike for everything uPVC windows stand for and curse their invention. By no means am I saying the single glazed aluminium crap you get here is any better, but a decent, thermally broken (non continuous construction) frame with a double glazed unit that has been fitted properly (not by any of tradie) will perform as well if not better, and so much more aesthetically pleasing.