Archello Awards · Winners Announced
Archello Awards 2024 · Winners Announced
Archello Awards 2024
Winners Announced
SETTING A GOOD EXAMPLE FOR SUSTAINABLE ARCHITECTURE: ALL-NATURAL MATERIALS FOR BERLIN SCHOOL EXTENSION Story by Elevate SETTING A GOOD EXAMPLE FOR SUSTAINABLE ARCHITECTURE: ALL-NATURAL MATERIALS FOR BERLIN SCHOOL EXTENSION After-School Care Centre Waldorf School Story by Mono Architekten After-School Care Centre Waldorf School
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After-School Care Centre Waldorf School

Mono Architekten as Architects

The grounds of the Waldorf School in Prenzlauer Berg possess a unique urban positioning between socialist prefabricated structures, Wilhelminian style blocks and the green spaces of the Jewish cemetery. The school building, having undergone a spirited renovation process, is a 5-storey prefab building from the 1970s.


The after-school care centre and later extensions were designed in a completely different style. The new centre docks on the school’s courtyard stretching towards the sports hall, providing the schoolyard with a structural back to the street and a clear centre. The projections and recesses create different outdoor areas for various uses. The buildings received green roofs inclined in different directions and, with the rising eaves of the wooden facades, a sculptural impression.


The central access zone winds its way from the existing staircase through the newly built ground floor, accompanied by a massive clay wall. Lounges, cloakrooms etc. and various outdoor exits alternate. The group rooms are behind the clay wall with a plateau above the cloakrooms with a view into the crowns of the surrounding trees. The goal was to use natural and renewable building materials to comply with the Waldorf educational idea. Themed “school builds school”, most of the construction work was carried out by the Knobelsdorff School.


The colouring was created by the natural hues of mostly untreated materials. Coloured clay plaster, wooden floors and wall heating integrated into the outer clay walls create a pleasant atmosphere in the interiors, ensuring a healthy indoor climate. The structure was made with a timber frame construction with cellulose roofs while the outer walls were filled with building straw and plastered inside with clay. The façade is made of differently sized vertical larch wood boards. The district heat is used as an energy source, feeding the wall and underground heating. Decentralized exhaust systems in the cloakrooms support the manual ventilation concept.

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SETTING A GOOD EXAMPLE FOR SUSTAINABLE ARCHITECTURE: ALL-NATURAL MATERIALS FOR BERLIN SCHOOL EXTENSION

Elevate as Roofing

Contemporary architecture and sustainability are becoming inseparable. The energy efficiency of buildings, the sustainable use of construction materials and the ways in which buildings can contribute to reducing the impact of climate change are inspiring and motivating architects across the world. The extension of the Free Waldorf School in Berlin is one of those cases that makes us dream of a well designed, eco-friendly tomorrow.

photo_credit Hortneubau MONO Architekten
Hortneubau MONO Architekten

In 2015, German architectural practice MONO Architekten was assigned a very ambitious redevelopment project at the Free Waldorf School in Prenzlauer Berg, Berlin. Their task was to extend the original prefabricated building from the 1970s by creating a brand new after-school building.

For this new structure, architects at MONO chose to completely depart from the school's original architectural style and use more contemporary, organic shapes instead. Their design for the new after-school center consists of a cluster of curved pentagonal volumes of different sizes and heights, with the roof slopes going in different directions. Topped with green roofs, the overall effect is reminiscent of lush mossy stones.

Sustainability was at the core of the project, and MONO Architekten used natural and renewable materials wherever possible. The structures of the extension are timber framed and walls are built from straw and clay plaster. Untreated larch wood planks of various widths serve as exterior cladding, which truly evokes the feeling of a calm oasis in the middle of the busy European capital. The extensive 450 m² green roof perfectly completes this approach by providing more space for nature while being perfectly waterproofed by Elevate’s RubberGard EPDM roofing membrane underneath it. And it’s not just about looks.

 

ARE GREEN ROOFS THE RIGHT CHOICE?
In addition to their aesthetic value, green roofs offer many benefits, particularly in urban settings. To start with, they have an overall positive effect on people’s health and well-being, providing a good environment for social interaction, something especially important in a public space such as a school. For the extension of the Free Waldorf School, a mix of low-growing herb grasses was the vegetation of choice. During the flowering season, it will offer a colorful picture to the children and attract beneficial insects such as pollinators, improving  local biodiversity.

Green roofs also help mitigate the “urban heat island effect” by returning moisture to the environment. Moreover, they provide thermal and sound insulation. Both advantages are very important in school settings. 

To accommodate the creative vision of the architects, the roofing membrane for the new after-school extension had to be sustainable, efficient, versatile and flexible, offering a perfect fit for the irregular shapes of the building. It also had to be lightweight and robust enough to provide a durable basis for the green roof system.

 

WHY ELEVATE RUBBERGARD EPDM?
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 Elevate’s RubberGard EPDM roofing membrane 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 and always returning to its original shape. It can be used in all kinds of climates and can be fully adhered, mechanically attached or ballasted.  RubberGard EPDM is also environmentally friendly. In combination with green roofs, it maximizes its sustainability advantages.

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.

Request a sample and get inspired with our roofing solutions.

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