I assume you also take steps to remove graffiti from walls and street
furniture, get rusting vehicles removed from front gardens, ensure that
there are no noisy children bashing footballs around in the street,
remove litter, ask people with noisy exhausts to get them silenced,
take steps to prevent drunk teenagers from damaging property and waking
everybody up in the middle of the night. Because surely all of the
above the affect quality of life of any normal reasonable person, and
the way the area is 'perceived'; way way before the composition of
someone's windows are even noticed ?

We have all of those things already. Especially after the old BX in
someone's garden was removed.

Personally, I think the lack of plastic windows puts the chavs off living
there in the first place.

Christian.