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RoofKIT – On what the team is addressing, what the goals are and how it intends to achieve them

Urbanisation in Europe reached approximately 75%, and the tendency is growing; thus, European cities face several urgent problems, which should be solved to comply with the EU targets to fight climate change.

To name a few critical problems aligned with the scope of the project: 

  • Available living space is getting rare within the existing boundaries due to the increasing rate of migration from people into cities and the constant growth of the consumption of square meter per person.
  • Environmental quality in cities is strongly affected by pollution, mainly caused by combustion (traffic, heating), and increasing temperatures as well as heat waves during the summer due to urban heat island effects.
  • Most buildings of the existing building stock in European cities were built with a low energy efficiency standard which results in high energy consumption (mostly for heating) and related CO2-emissions.
  • Lastly, the building materials are not only slowly getting scarce and affect the quality of the living spaces, but the building sector is also responsible for a large amount of waste.

To tackle this, Team RoofKIT choses a holistic approach: The extension of buildings with an additional living unit requires combined urban design and architectural strategies, considering the specific requirements of the site but at the same time seeking a more general solution regarding adding living units on cities’ rooftops. RoofKIT‘s goal here is to take up the local potentials of the site and neighbourhood and improve it together with the building design by creating synergies. Together with the outdoor space, the extension will be an exemplary project that will fit into various other contexts in the neighbourhood, the city, and beyond, thanks to ist modularity. It is important that the outdoor space makes no distinction between residents, neighbours or visitors enabling flexibility, multiple uses, capacity, creativity and freedom of use.

Whole Building Design Approach
Although topping up allows creating living space with very low impact on neighbours and users of the existing building, RoofKIT decided to enhance the current situation and to upgrade the existing building by economic, social and energetic terms. Therefore, the interior layout is revised according to the needs of the different functions. Based on the analysis of the existing functions of Café Ada, strategies have been developed to strengthen them further: The ball room that attracts tango dancers from all parts of the world as well as theexisting sleeping facilities for them are not appropriate to the situation.  For this reason, an ‘urban gap’ is created, which forms a transition between the existing structure and the extension and presents the dance hall to the public. The load bearing structure from the early 20st century will be further used and partly reinforced.

Whole Building Design Approach © Team RoofKIT

House Demonstration Unit Design Approach
In order to transfer the concept from the overall building to the house demonstration unit, RoofKIT has chosen the southwest corner of the building as a cutout. It is perceived as a two-story structure that represents the two main components of our building: The residential units and the urban gap. Just as in the overall design, the HDU is built in modular timber construction and consists of a total of four modules. The module that is placed in front of the others in a transverse direction functions as a terrace and represents the shared spaces of our building design. Inside, the interior design is also characterized by modularity in the form of custom-made furniture, which allows flexibility and is especially space-saving at the same time. Furthermore, the open floor plan allows for high space efficiency since no pure traffic zone exists.

Structural Design
The challenge for the RoofKIT design is to base on an already existing building, whose bearing structure has almost reached its load limits. The structural design of the project keeps the established building almost free from additional loads. This works because the thick external brick walls bears the load of the addition. An examination of the walls and foundations will show whether they need to be strengthened. The internal supporting structure has to be reinforced, to bear the increased live loads of the ball room in the urban gap. To keep the additional loads for the top-up to a minimum, a lightweight wooden frame construction was chosen.

Solar System Integration
As the RoofKIT top-up is a new construction with a high energy efficiency standard, the total energy demand (including appliances and e-mobility) will be covered by solar systems on the building envelope. As part of the goal, the sizing of the RoofKIT’s PV and battery system will focus on a high self-coverage of the energy demand as well as on stabilising effects of the grid. In other words, the feed-in of surplus electric energy during solar peaks and heavycharging of grid energy during peak load times will be avoided by a smart building energy management including the building and mobility solutions. A balanced energy threshold over the year (consumption and generation) as a function of available solar radiation, actual energy demand and grid requirements will be achieved by load shifting or any other sort of demand-side management. RoofKIT does not regard the use of solar systems as a mere necessity but as a possibility to design the building on an architectural level. 

Solar System Integration © Team RoofKIT

For better insight, RoofKIT’s second short film reveals more details and goals about the project. Stay Tuned!

Theory and Concept Video © Team RoofKIT

RoofKIT links: https://linktr.ee/RoofKIT
Instagram: www.instagram.com/roofkit_
Solar Decathlon Europe 21: www.SDE21.eu
Instagram: www.instagram.com/sde21_wuppertal

       
 
 
 
Karlsruher Institut für Technologie
Fakultät für Architektur
Institut Entwerfen und Bautechnik

Professur Nachhaltiges Bauen
Englerstr. 11, Geb. 11.40, Raum 25
D-76131 Karlsruhe
 
Tel: +49 (0)721/608-42167
 
 
 
Recent Publications:  
 

    Event: Solar Decathlon Europe 21/22

    May 3, 2022

    Team RoofKIT (2022), “Veranstaltung: Solar Decathlon Europe 21/22”, in: polis – Urban Development, January 2022, p. 85

     
     

    Wood-Veneer-Reinforced Mycelium Composites for Sustainable Building Components

    April 11, 2022

    Özdemir, Eda, Nazanin Saeidi, Alireza Javadian, Andrea Rossi, Nadja Nolte, Shibo Ren, Albert Dwan, Ivan Acosta, Dirk E. Hebel, Jan Wurm, and Philipp Eversmann (2022), “Wood-Veneer-Reinforced Mycelium Composites for Sustainable Building Components”, in: Biomimetics 7, no. 2: 39, March 2022, https://doi.org/10.3390/biomimetics7020039, URL: https://www.zukunftbau.de/projekte/forschungsfoerderung

     
     

    Interview: 3 questions to Dirk Hebel

    March 21, 2022

    Müller, Judith, and Dirk E. Hebel (2022), Drei Fragen an Dirk Hebel, in: KIT-Zentrum Mensch und Technik, March 2022, URL: https://www.mensch-und-technik.kit.edu/dreifragenanhebel.php

     
     

    Becoming recyclable. The city as a regenerative resource

    March 19, 2022

    Hebel, Dirk E. (2022), Kreislauffähig werden. Die Stadt als regenerative Ressourcein: Bauwelt, Re-Use, ed. 6.2022, 15 March 2022, p. 16-19, URL: https://bauwelt.de/rubriken/betrifft/Kreislauffaehig-werden.-Die-Stadt-als-regenerative-Ressource-3744598.html

     
     

    Plant-based data centers

    March 15, 2022

    Judge, Peter (2022), Plant-based data centers, in: Data Centre Dynamics Ltd (DCD), 17 March 2022, URL: https://www.datacenterdynamics.com/en/analysis/plant-based-buildings/

     
     

    Stone on stone, mycelium or wood?

    March 10, 2022

    Schneeweiß, Ulrike (2022), Stein auf Stein, Pilz oder Holz?, in: Helmholtz Klima-Initiative, 03 January 2022, URL: https://www.helmholtz-klima.de/aktuelles/stein-auf-stein-pilz-oder-holz

     
     

    The Real Estate Industry needs a Master Plan for Circular Construction

    February 28, 2022

    Werth, Hans-Jörg (2022), „Die Immobilienwirtschaft benötigt einen Masterplan für zirkuläres Bauen“, in: Handelsblatt inside REAL ESTATE, 22 February 2022

     
     

    Innovative biological building materials

    February 16, 2022

    Hebel, Dirk E. (2022), “Innovative biologische Baumaterialien. Pilze als neuer Baustoff zum Schließen der Ressourcenlücke”, in: BauPortal, Fachmagazin der Berufsgenossenschaft der Bauwirtschaft, February 2022, p. 14-16

     
     

    Pure towards the Future

    January 31, 2022

    Hebel, Dirk E. (2021), Sortenrein Richtung Zukunft, in: Materialreport 2022, Raumprobe OHG (ed.), December 2021, p. 6-11

     
     

    Material/Research

    January 31, 2022

    Hempel, André, Eva Hermann, Verena Kluth and Helga Kühnhenrich (ed. BBSR) (2022), “Material/Forschung”, in: ZUKUNFT BAU Forschungsförderung, 2022, p. 10-13

     
     

    Now it’s Round & Old and New Building Materials

    January 31, 2022

    Braune, Anna (2022), “Jetzt geht’s rund – Circular Economy bei der Planung und im Bauen”, in: Deutsches Architektenblatt, DAB Regional Baden-Württemberg, 02/2022, p. 10-11

    Renz, Gabriele (2022), “Alte und neue Baumaterialien: Stroh-Wand Pilz-Ziegel Baum-Decke”, in: Deutsches Architektenblatt, DAB Regional Baden-Württemberg, 02/2022, p. 12-13

     
     

    Roofkit – How do we build in the future?

    January 26, 2022

    polis (2022), “ROOFKIT – WIE BAUEN WIR IN ZUKUNFT?”, in: polis online, 26.01.2021, https://polis-magazin.com/events/event/roofkit-wie-bauen-wir-in-zukunft/

     
     

    Changes in the Building Industry & Harvesting and Seeding Building Material

    January 10, 2022

    Hebel, Dirk E. (2022), “Wandel im Bauwesen”, in: Deutsche Bauzeitschrift, 01|2022, p. 36

    Hebel, Dirk E. and Felix Heisel (2022), “Baumaterial ernten und säen”, in: Deutsche Bauzeitschrift, 01/2022, p. 40-44

     
     

    Architectural Education for the Age of Circular Construction

    January 10, 2022

    Blümke, Katharina, Daniel Lenz, and Dirk E. Hebel. 2021. “Architekturausbildung für das Zeitalter des zirkulären Bauens.” LUST AUF GUT(e) VIER WÄNDE – REPUBLIC OF CULTURE  Special: Rund ums Bauen und Wohnen, October 29, 2021. https://www.lust-auf-gut.de/magazine-previews/blaettern/lust-auf-gut-magazin-special-rund-ums-bauen-und-wohnen-34/.

     
     

    A Future for the Building Stock

    December 10, 2021

    Schoof, Jakob (2021), “Eine Zukunft für den Bestand (5): Umbauprojekt RoofKIT für den Solar Decathlon Europe”, in: DETAIL online, 09.12.2021, https://www.detail.de/artikel/eine-zukunft-fuer-den-bestand-5-umbauprojekt-roofkit-fuer-den-solar-decathlon-europe/

     
     

    Café ADA – Solar Decathlon in Wuppertal: Two Visions for the Renovation

    December 10, 2021

    Haus-, Wohnungs- und Grundeigentümer-Verein in Wuppertal u. Umgebung e.V. (Hrsg.) (2021), “Café ADA. Solar Decathlon in Wuppertal: Zwei Visionen für die Sanierung”, in: hausundgrund – Magazin für Haus- und Grundstückseigentümer, ed. 10/21, p. 22-27

     
     

    The Architecture of Waste – Design for a Circular Economy

    November 29, 2021

    Hebel, Dirk (2021), “Afterword”, in: The Architecture of Waste – Design for a Circular Economy”, 2021, p. 232-233

     
     

    Myco-Architecture: Building with Mushrooms

    November 18, 2021

    Sigmund, Bettina (2021), “Myko-Architektur: Bauen mit Pilzen”, in: DETAIL, 6.2021, p. 32-35

     
     

    Cultivating Cycles

    November 18, 2021

    Himmelreich, Jørg (2021), Round Table with Dirk E. Hebel, Folke Köbberling and Martin Kaltwasser: “Kreisläufe kultivieren”, in: Das Magazin der SCHWEIZER BAUDOKUMENTATION, 06-2021, p. 18-21

     
     

    lookKIT – The magazine for research, teaching, innovation

    November 2, 2021

    Fuchs, Stefan (2021), Interview with Sandra Böhm, Daniela Schneider and Dirk E. Hebel: “Wir müssen einfacher, intelligenter und sortenrein bauen”, in: looKIT, 03/2021, p. 10-14.

    Wiebe, Sandra (2021), “The Future City as Resource Supply” (about RoofKIT), in: looKIT, 03/2021, p. 34-37.

    Link, Regina (2021), “Das Bauwesen braucht eine radikale Wende” (about Architects for Future Karlsruhe) , in: lookKIT, 03/2021, p. 46-49.

     
     

    “The time of mycelium will come”

    November 2, 2021

    Backhaus, Anne (2021), “Die Zeit der Pilze wird kommen”, in: Energiewende-Magazin, Nr. 9/2021, p. 46-55.

     
     

    Interview: With the future design of reversible buildings, cities can become their own material reservoir

    June 25, 2021

    Hebel, Dirk E., and Cordula Rau (2021), Cordula Rau im Gespräch mit Dirk E. Hebel: Mit der künftigen Konzipierung rückbaubarer Gebäude können Städte zu ihrem eigenen Material-Reservoir werden, in: architektur. aktuell: the art of building, June 2021, p. 14-15.

     
     

    Urban Mining and Circular Construction

    June 1, 2021

    Heisel, Felix, Dirk E. Hebel, (Ed.) (2021), Urban Mining und kreislaufgerechtes Bauen. Die Stadt als Rohstofflager, Stuttgart: Fraunhofer IRB Verlag, 2021.

     
     

    Bricolage: Renewable building materials

    June 1, 2021

    Hebel, Dirk E., and Jenny Keller (2021), Bricolage 3: Nachwachsende Rohstoffe, in: werk, bauen + wohnen, Materialkreislauf, 5-2021, p. 30-31.

     
     

    Green architecture or green fairy tales?

    May 12, 2021

    Welzbacher, Christian (2021), Grüne Architektur oder grüne Märchen?, in: Deutsches Architektenblatt, NACHHALTIG, 05/2021, p. 16-21.

     
     

    Building as materials cycle

    May 6, 2021

    Hebel, Dirk E., and Angela Kratz (2021), Bauen als Stoffkreislauf, in: IBA Magazin No. 4, Heidelberg für alle, April 2021, p. 24-25.

     
     

    Recycling through leasing

    May 6, 2021

    Angélil, Marc, Sarah Graham, and Cary Siress (2021), Recycling through leasing, in: Constructing Sustainability, Lafarge Holcim Foundation for Sustainable Construction, 2021, p. 36-37.

     
     

    Kindergarten Kambodscha

    March 30, 2021

    Fachgebiet Nachhaltiges Bauen KIT, Prof. Dirk E. Hebel, Elena Boerman, Daniel Lenz, Manuel Rausch (Hrsg.) (2021), Kindergarten Kambodscha. Professur Dirk E. Hebel. Master Studio KIT Karlsruhe Sommer 2019, Karlsruhe 2021.

     
     

    Concern of the building stock – Ten strategies for architecture

    March 16, 2021

    Welter, T., (2020), Sorge um den Bestand: Zehn Strategien für die Architektur, in: der architekt, 6/2020, p. 76.

     
     

    local material, local design, local built.

    March 8, 2021

    Böhm, Sandra (2020), Local material, local design, local built., in: archlab.docs #3, KIT Research Preprint, Karlsruhe 2020.