About Us

KF 310 uPVC-aluminium windows, Burnt Oak Broadway, Edgware

Internorm is Europe’s leading manufacturer of quality, high performance windows and doors. Established over 90 years ago, internorm is still a family run business, with nearly 30 Million units produced to date.

Innovation, quality and performance are the key criteria for our product range and we are passionate about . Our composite timber-aluminium, uPVC, and uPVC-aluminium composite windows and doors, offer:

• outstanding U-values - as low as 0.62 W/(m²K) below Passivhaus standard
• exceptional noise reduction - as high as 48dB) and
• enhanced security (RC2/3 - PAS 24 and Secured by Design)

All bespoke triple-glazed Internorm windows and doors are manufactured in three state-of-the-art manufacturing facilities in Austria, quality checked and then transported the 1300 distribution partners worldwide, or directly to site for our commercial clients in the UK.

The team at Internorm Commercial work closely with developers, contractors, architects and consultants to offer advice and supply the most suitable and cost effective Internorm products for each project. Our focus is on high specification new build and retrofit projects, including Passivhaus and EnerPHit, where a fabric-first approach is adopted. Internorm products perform to the highest standards, and by working closely with the client, the Commercial Team can find bespoke solutions to most challenges.

Whether your project demands highly energy-efficient windows, need to cut noise in urban areas, or require windows and doors that keep occupants secure, Internorm has products to meet all these requirements. Take a look at some of the recent case studies to see how we worked with our clients to meet their needs.

Meet the Team


David Johnson
David Johnson Commercial Manager

David joined Internorm in 2020 to support the growth of the commercial division. He has been in the fenestration industry for four years after previously working in the oil and gas industry. Working predominantly in project management, estimating and operations, David has been involved in a range of large residential projects across England and Scotland since joining the Internorm team.

Vasilis Giannopoulos
Vasilis Giannopoulos Specifications Manager

Vasilis Giannopoulos graduated with a Master’s Degree in Civil Engineering from Patras University in Greece, and an MBA from the Athens School of Management. He is also a qualified Passivhaus Designer and Trainer and passionate about improving the performance of buildings. He strongly believes in educating architects and specifiers about the Passivhaus principles and the importance of incorporating quality windows within the building envelope.

Andy New
Andy Sykes Internorm Commercial Agent

Andy has been in sales and large commercial project management for over 15 years, having built his expertise in the new product development, technology and private investment industries. Working with Internorm since 2016, Andy now manages large scale commercial glazing projects including residential schemes, luxury apartment projects and high-end retirement villages in full.

Sakib Hussain
Sakib Hussain Commercial Project Manager

Sakib has over 12 years’ experience in the fenestration industry, project managing projects with values between £500K – £5 Million. He meticulously handles Internorm projects from the point of order all the way through to final delivery, ensuring schedules are adhered to.

Accommodating & Collaborative

“We recently worked with Internorm UK at the early design stage of a 91-home residential development in London. The project required high-performance timber-aluminium composite windows and doors that would minimise heating demand, optimally balance solar gain in winter and light transmission throughout the year, and achieve the required high acoustic performance.  Internorm were able to accommodate all the requirements of this complex project while maintaining the crisp and uniform aesthetics we were looking for. The collaboration has been instrumental in finding the balance between design, performance and cost.”

Frederick Fasola: Associate | Architect

An Invaluable Partner

“Internorm has been an invaluable partner for us as home builders. They have allowed us to explore clever design solutions to intricate and demanding constraints that have occurred within the industry due to constantly developing regulations. Working closely with Internorm, we have been able to meet all regulations and achieve aesthetic solutions that provide a superior standard of living for our homeowners. The close working relationship and support has been invaluable for us as to achieve our ideas and designs.”

Ricky Patel: Designer, Acorn Property Group

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