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SIK-Holz® was successfully tested for its operational environmental impact in 2010 and was awarded the ‘Brandenburg Environmental Seal in Crafts’. This seal describes a functioning environmental management system in which all operational processes are subjected to a regular environmental impact assessment. We obtain climate-friendly electricity from Elektrizitätswerke Schönau that come from renewable energy sources, only use recycled paper and do not use any disposable items of any kind. We almost exclusively use black locust wood from sustainably managed forests in Germany for the manufacture of our playground equipment. We can offer our products with an FSC® or PEFC® certificate on request. All wood scraps are used for the company’s own heating or as firewood. Thanks to the good properties of black locust, our play equipment has a very long service life and therefore a very good energy balance when properly maintained. We recommend the renovation or upcycling of our playgrounds and offer these services on request.

Residual woods are offered in lattice boxes as firewood

FSC-wood yard

For in-house transports cargo bicycles are used

Example playship «Dau» in Berlin-Hasenheide – rehabilitated after 14 years

Example playground in Brühl – rehabilitated after 14 years


At 13 locations around the world, young people from different countries built a playground equipment in the form of a rainbow in workshop camps lasting several weeks under the guidance of Klaus-Peter Gust. These rainbows represent hope in places otherwise defined by separation and destruction. Many participants are still networked today. Some rainbows have found sponsors and have been restored. Playground equipment, but also bridges are what connect us with other people and cultures. [www.regenbogenproject.de]

Throughout Germany we support many social and cultural projects with donations in kind and money. For years we have been providing an intensive sponsorship for a class from the 3rd to the 6th grade in our community’s primary school. We are committed to concrete projects in the field of refugee aid. Through our company we strengthen the development and opportunities of rural areas. We are an active member of various organisations, standards committees and networks that promote the education of children and the design of people’s living environments.

Project «Rainbow» in the Berlin Mauerpark

Project «Circle of values» in Premnitz

World play day with ark and radio «Teddy» in Jüterbog

Our sponsor class - the 3rd class of the Lindenschule Jüterbog

Birdhouses build with school class

Build benches with refugees

Project «City of flowers» with der Jüterboger refugee aid

Project «City of flowers» with der Jüterboger refugee aid