emma wrote:
We are having a large extension built which will entail replacing all
the windows and door on the back of the house and one or two elsewhere.
The existing windows are 11 year old timber double glazing - not the
best quality in all likelihood if the rest of the house spec is
anything to go by and one has already blown, so all will probably need
replacing in 5-10 years anyway. Our architect specified Timber windows
again, but the builder has suggested UPVC as the price difference once
they are fitted and painted is very little and he says UPVC are great
nowadays, low maintenance and more secure. Which is better - Timber or
UPVC? This is a modern house so either would fit in - any thoughts or
recommendations?

Thanks

Emma

I would say that good hardwood windows would be preferable to UPVC for
many reasons. Not so much with softwood, And hardwood is exspensive.
However, if house value is important, there seems to be the strange
situation that any house without UPVC needs "upgrading" according to
estate agent types.
So you can spend loads of cash on timber, only to find it reduces your
resale market.
However, if you are having an extension build and intend to stay a long
time, resale is not so much a criterion.
By the way, blown sealed units has little to do with the frames, unless
the frames are so poor that they move around and stress the sealed
units.
Simon.