We are on the 2nd floor of an old department store in Oxfordshire and are looking to replace our old single glazed sash windows for UPVC( we just cannot maintain wooden ones, scaffolding etc) we have been quoted £12,000,l without scaffolding and we only have 10, not very large windows, this seems a bit excessive? Every other thread I read seems to be £5000 for 12 to 15 windows and a couple of doors thrown in for good measure. does anyone have a good recommendation for a local company they were happy with? TIA