With this long list of requirements, MONO Architekten specified an EPDM roofing membrane for the project.
The sustainable features of EPDM are widely recognized by institutions and environmental organizations. Greenpeace, GreenTeam and the Dutch Institute for Building Biology and Ecology (NIBE) have named it as the roofing membrane with the least environmental impact that offers a durable, long-term solution for modern architecture. In its latest evaluation, NIBE states that EPDM roofing membranes are the most environmentally friendly choice for flat roofs. What are the specific criteria of this evaluation? Carried out every two years, it compares the initial costs (material and installation costs) as well as all hidden environmental costs (raw material consumption, energy consumption during production) of roofing membranes from different manufacturers.
How exactly did EPDM make a good fit for the Free Waldorf School project in terms of design freedom? First of all, it’s single-ply, which means it can adapt to irregular shapes very easily, following the geometry of the support and accepting its various expansions and retractions without ever saturating or breaking. Unlike many other roofing membranes, it also returns to its original structure after stretching.
Finalized in June 2017, the project was one of the winners of Germany’s Federal Timber Construction Plus 2018 competition, in the category "Public Building - New Buildings & Existing Buildings". The German Federal Ministry of Food and Agriculture grants this prize every two years, rewarding exemplary buildings made with renewable raw materials.
This project was also nominated for the Deutsches Architekturmuseum (DAM) Award for Architecture 2020, one of the most renowned architecture awards in Germany.