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What's the level of light transmittance?

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Carefree Windows and Doors

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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.



Further extension of the production facilities in the PVC construction with computer processing machines. Capacity is expanded.
First windows manufacturer worldwide with own iPhone app (ISOGON Energiesparer) and iPad App (ISOGON Fenster & Türen info app for Apple mobile devices.


Further extension of the production facilities in the aluminum construction with computer processing machines.


ISOGON Logo-Relaunch


Expansion of supply and services to Hamburg and North Germany


Beginning of the mosquito protective products. In the same year, to mark the anniversary, new corporate brochures and a modern logo.


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


Start of the shutter manufacturing


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.


Increased demand for PVC windows


Start trade with PVC windows


Realization of the first large buildings in Berlin


Establishing as a Glazier in Berlin

Our windows carry the
CE-mark which indicates the conformity of the product
to the European guidelines.

ISOGON is one of the winners of this year's Great Place to Work® competition "Best Employers 2019 in Berlin and Brandenburg".

Trendsetting hardware solutions offers high functionality and security.

© 2022 ISOGON Fenstersysteme GmbH. All rights reserved.