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What's glass made up of?

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Old windows out!

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Our Story began about 20 years ago with the founding of a glazier. A three-man operation with a lot of creative energy. In the first years our activity was limited to the repair and installation of windows, doors and glass elements. Within a few years 15 employees were employed in the company. The windows were supplied by outside companies and we often had to contend with problems of quality and punctuality of our suppliers. This led to angry customers and we decided to manufacture the windows and doors on our own. To realize our goal of offering the customer a product from a single source, ISOGON Window Systems GmbH was founded in 1992. ISOGON has since become an established and experienced professional manufacturer of components made from plastics and aluminum.

Today the ISOGON Window Systems GmbH is a 100% family-owned company, supportive and with social responsibility towards its area. It's motivated employees are a guarantee for the long-term success of the company.

ISOGON - windows that perfect your home.



ISOGON celebrates its 30th anniversary.


TESLA Fleet electrified


Implementation glazing robot


Great place to work 2019 award


Launch of iQ | Pro Webconfigurator


Expansion of production capacities in all product areas.


Implementation of a state of the art ERP system


First windows manufacturer worldwide with own iOS app (ISOGON Energiesparer) and iPadOS App (ISOGON Fenster & Türen info app


ISOGON Logo-Relaunch


Expansion of supply and services to Hamburg and North Germany


Further expansion of production facilities by computer processing and cutting machines.
Capacity is expanded and better quality is guaranteed.


Construction and commissioning of the plant in the industrial area Grenzallee, Berlin


Registration of the trademark:
ISOGON Fenstersysteme GmbH


Expansion of production facilities via first computer systems to ensure the quality in workmanship.


ISOGON Window Systems GmbH moves into their new business and production in the Haberstraße in Berlin.


Expansion of production facilities to expand capacity.


Shareholders of the Glazier found the ISOGON window systems GmbH in Herzfelde to comply with the desired demand for PVC windows.


Start trade with PVC windows


Establishing as a Glazier in Berlin

Awarded with the "German Design Award" for innovative product design.

Our website is CO₂-neutral.
Thereby we reduce the CO₂-emission.

Entrance door panels - first class quality and easy-care longevity.

© 2023 ISOGON Fenstersysteme GmbH. All rights reserved.