New Addition Windows
Buy new windows in Thirsk, North Yorkshire

New Addition Windows is a small family run business founded in 1991 for the manufacture and installation of UPVC Windows, Doors and Conservatories. This makes us the longest established window company in our area! Having only a small work force ensures the quality of work and after sales service is maintained to the highest standards. Ninety per cent of our work comes by recommendation and word of mouth.

We have also gradually expanded into wood and can meet any requirements for traditional buildings such as sliding sash as well as modern hardwood and soft wood windows and doors.


New Addition Windows manufacture their windows using Duraflex fully sculptured diamond suite which is extruded at Tewkesbury. Duraflex can provide profile in a number of foiled colours which include brown mahogany, golden oak, Rosewood, White, Cream Plus many more. If you are interested in learning more about our profile please visit


All our glass is supplied to us by Twinseal who produce high performance double glazed units using the latest glass technology such as Argon Gas, Super Spacer and low iron. These various combinations produce double glazed units that meet the demanding requirements of the window energy rating system.

Twinseal also supply double glazed units to offer solar control, self clean & acoustic properties. For further info please feel free to browse their website