Hi! I am replacing some old aluminium framed windows and want to replace them with triple glazed insulated aluminium ones with as low a U-value as possible and really good sound insulation, but also with as slim frames as possible given that the windows are triple glazed.
So far I have been recommended one firm whose windows (Rationel) had really thick frames and who were really expensive, one local company who didn't listen and insisted I only needed double glazing, and a Croydon firm who made some windows for a neighbour which I think look really cheap and ugly (but he insists they are marvellous!).
A look on Google shows there are loads of firms out there - but which one to chose? My brain hurts!
Has anyone done a similar thing? Does anyone have any recommendations (or "avoid" advice!) for different makes of windows and installers, or local firms? (I'm in North London.)