According to the plans on Denbighshire’s website, current timber finishes will be upgraded from timber to UPVC.

Source: https://www.rhyljournal.co.uk/news/prestatyn/23350813.plans-convert-shop-dental-practice-prestatyn/?ref=rss

But Conservative councillor for Pannal and Oatlands, John Mann, said UPVC windows are cheaper and more effective than traditional windows.

Source: https://www.harrogateadvertiser.co.uk/news/politics/former-homeless-hostel-in-harrogate-set-to-be-converted-into-six-new-apartments-4357585

The property benefits from double-glazed UPVC windows fitted throughout, a newly fitted oil boiler, and all main connections.

Source: https://www.irishcentral.com/dream-homes/priests-house-sale-brosna-kerry