About Windows Darlington


Need high quality, energy efficient windows in Darlington? Our incredible Kommerling windows are manufactured and installed by us. Available in a variety of frames and colours, Kommerling windows are a highly advanced window system. Our service also allows you to choose from a range of glazing options, so that you can fully customise your windows to fit exactly what you need. Don’t settle for substandard windows, choose Sealtight Windows NE Ltd; the number one provider of quality windows in Darlington.


Kommerling have been the industry’s leading window for over 40 years, offering high quality and constant innovation. When manufacturing our windows, we make sure to consider environmental factors. That’s why our windows are extremely sustainable and energy efficient. By recognising the global issues we face, we can be sure to tailor our products and services to better manage these issues. Our Kommerling windows have had all lead additives removed and replaced with recycled materials, and our windows have been designed and built using the highest standard of materials, that are designed to insulate heat and conserve energy.


The energy efficiency of our windows is as a result of the patented 5 chamber profile used in our window frames. This structure, compared to our competitors 3 chamber profiles, helps to maintain a significantly improved thermal profile, allowing for much higher energy efficiency. The meticulous design and professional installation of our windows provides a clean, modern look, whilst offering practicality and functionality. All of our windows also come supplied and fitted with the following:


  • A 70mm profile depth
  • Internal beading that provides higher security
  • A 25 year colourfast guarantee
  • Increased insulation from our 5 chamber profile
  • 44 different colour choices
  • A reinforced profile


By investing in energy efficient products like our windows, you can help to maintain a warmer home more easily and drastically reduce your heating bills; as well as contributing to reducing our consumption of natural resources.


Our commitment to quality services allows us to provide windows that are fully designed to your requirements; giving you full control of the colour, frame and glazing. With this control, you can easily find a window that suits your home.


Our windows are also fitted with Pilkington glass, an industry leader in terms of quality and innovation. By using Pilkington glass, we are able to provide the people of Darlington with the most advanced, efficient and modern windows available.


For quality window manufacture and installation in Darlington, choose Sealtight Windows NE Ltd.