Our house is quite big (7 bedrooms), built in 1912 in Victorian style with timber windows, mostly sash. They mostly have secondary double glazing which is a pain anyway but in winter the house is freezing and the gas bill is enormous. Several of the windows need replacing. We couldn't possibly afford to have them all done at once so my dilemma is whether to start replacing the timber windows with uPVC or stick to timber and all the issues with maintenance, energy costs etc. we will be downsizing in the not too distant future so my question is what would you prefer if you were to buy my house- timber (which is obviously more aesthetically pleasing) or uPVC for practicality? (Actually it will probably be a mixture unless we win the lottery in the meantime).