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Made in Austria


In 1931, Eduard Klinger Senior founded the Klinger building and metalworking business in Linz, Austria and soon made a name for himself as a manufacturer of aluminium portals, and later as the first manufacturer of UPVC windows in Austria. Today, Internorm is Europe's leading windows brand. Our success is based not least on the connection with the location and our tradition. As the third generation of an owner-managed family business, Internorm today still produces 100% Made in Austria

Home advantage: our employees

Home advantage: our employees

Expertise as the top priority


Our quality products are developed and produced by our employees in factories in Traun, Sarleinsbach and Lannach in Austria. Their professional qualifications are enhanced by further individual training measures to allow them to also satisfy future requirements. At the same time, our innovation and manufacturing quality are based on the sound know-how and expertise of our employees.

Europe-wide network: select partners

Europe-wide network: select partners

Collaboration with select partners


Word about the quality of our products has long since spread beyond the borders of Austria. In order to also achieve the desired quality on site, across Europe we work with over 1.000 select partners for distribution and fitting. For the special requirements of well-designed architecture, architectural consultants with professional experience are available to planners and architects during planning, execution and monitoring of the installation.

Austrian production sites: three plants

Austrian production sites: three plants



Traun, Upper Austria
Business headquarters and production site


The Traun site is home to the business headquarters of International Windows Network (IFN) and Internorm International. All central areas, the management and Board of Directors are based here. In addition to this there are also three production departments in Traun: Special UPVC products such as round or sloping windows, composite windows, aluminium window shutters, aluminium doors and insulating glass are manufactured here.

4050 Traun, Austria, Ganglgutstraße 131
Tel.: 0043/7229-770-0, Fax: 0043/7229/770-3030


Sarleinsbach, Upper Austria
Production of UPVC windows


Internorm has been in Sarleinsbach since 1977. Since that time we have become not only the biggest employer in the area, but also the most modern windows production plant in Europe. UPVC windows and insulating glass are manufactured here. Extrusion is also located here.

4152 Sarleinsbach, Austria, Am Teichfeld 6
Tel.: 0043/7283/82 48-0, Fax: 0043/7283/82 48-3721


Lannach, Styria
Production of timber/aluminium windows


Our timber/aluminium products are manufactured here. To facilitate our policy of innovation, the plant was developed into a modern windows manufacturing business. The southern area distribution branch of Internorm is also based here.

Lannach/Styria plant:
Timber/aluminium production
8502 Lannach, Austria, Industriestraße 2
Tel.: 0043/3136/825 00-0, Fax: 0043/3136/825 00-2829