My home is 600+ years old and in 2 sections (original and extension) Whilst the extension is fitted with relatively new windows those in the old section were installed in excess of 30 years ago. The team that installed them worked extremely hard, were very pleasant, and very considerate towards our comfort. The courtesy shown by them was also evident - even to the point of asking if their music was of any disturbance to us. After installation, they left our premises very clean and tidy as well as cleaning the newly installed windows both inside and out. In the few days experienced post-installation, it would be an understatement to say that the rooms withheld the heat better than prior. I have no doubt it will also bring about a reasonable reduction in our fuel bills. In short, a great installation by kind courteous fitters and a customer who is well satisfied.