In answer JT76 question yes that quote is a tad on the expensive side. To fazer71, please pass me the details of the company that?s fitting fully treated. Fully sprayed, fully draught proofed, argon K glass, all making good, new architraves & bull nosing, new fittings, new weights, for the all inclusive price of a ?1000.00 I will give them loads to do. Also with regards you?re continuing debate as to the best value for money & longevity, please read what the experts from the school of engineering found out. http://www.cibse.org/pdfs/Masif.pdf You will see they found in favour of timber, not to mention that they found PVC contributes large amounts of poisonous pollutants throughout its life cycle, while timber window frames have the least environmental burdens. Or if you don?t believe them, then maybe this one http://www.greenpeace.org.uk/media/reports/pvc-u-or-timber-windows-which-is-best May be that?s why I today received a request to price for new timber windows for nine blocks in Tower hamlets. The only thing I will agree with, is they have come a long way as regards looks, but to call them identical is a bit over board !