The natureplus label identifies the best products for sustainable construction and has European-wide recognition among building professionals, consumers, environmental associations, governmental organisations and building rating systems.


The PEFC label promotes sustainable and responsible forest management. Only companies granted this seal of approval can market wood or wood products with the PEFC label.

Ü Certificate

The “Ü” certificate of national technical approval from the German Institute for Civil Engineering (DIBt) gives you the reassurance of knowing that GREEN LIGNIN products meet the key requirements of general technical approval for construction products.

Guaranteed non-polluting and emission-free

The “A+” certificate from the German Entwicklungs- und Prüflabor Holztechnologie GmbH in Dresden confirms that GREEN LIGNIN room and impact sound insulation meets the key requirements of the French regulation “Arrete etiquetage”. In terms of formaldehyde emissions, GREEN LIGNIN has been assigned to the top “A+” category.

DIN EN ISO 50001: Energy Management System

The ISO 50001 standard is a global benchmark designed to support organizations in creating a systematic energy management system. As well as energy data management and the implementation of specific technical measures, systematic energy management also includes strategic and organizational management approaches.
The KATZ Group has been certified to DIN EN ISO 50001 in its respective field since 2012.


We do not want any accidents at work and we will do everything to achieve this objective at all of our locations.

DIN EN ISO 14001: Environmental Management

ISO 14001 primarily focuses on the use of continuous improvement processes to enable companies to meet their goals in regard to environmental performance.
The KATZ Group has been certified to DIN EN ISO 14001 in its respective field since 2013.

DIN EN ISO 9001: Quality Management System

EN ISO 9001 defines the minimum criteria for a quality management system (QM system) which an organization must fulfil in order to be able to offer products and services which satisfy customers’ expectations and all relevant statutory requirements.
The KATZ Group has been certified to DIN EN ISO 9001 in its respective field since 2013.