We had work done in two stages; the first was the front of the house. Derwent Sash Windows rebuilt the bay and installed windows and new front door. Although it was a major undertaking the work was carried out with professionalism and care. Each night all those on site were careful to clean up after themselves to minimise the disruption. The windows were better than we had hoped, and many people we didn’t know stopped by to admire them. We had the back of the house done 10 months later and are absolutely thrilled with the transformation as new stone sills and lintels have also also installed. The standard of craftsmanship is second to none, and with a completely different crew we found the same outstanding quality of professionalism, courtesy and pride in their work. The quality of the windows and doors are superb so we would recommend the company and their product to anyone seeking to replace or reinstall sash windows.