Hi, I just moved into a Victorian property in East Dulwich with original Victorian sash windows. I am considering installing double-glazing but it seems that I cannot afford the type of double-glazing that looks exactly like a sash window (it is around ?10,000 for the whole property). We got another quote of around half the price from a company using slightly more chunky windows (UPVC Vertical Sliders - Rehau brand). But I am worried that this will still knock down the value of the property because it is still obviously has a "double-glazed" plasticky look although it is less chunky than some other makes. Any advice is gratefully received!