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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:  
 

    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

    Hebel, Dirk E. and Felix Heisel (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 (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.

     
     

    build up & dismantling/ cultivation/ development

    March 5, 2021

    Böhm, Sandra (2018/19), Bau auf! & Abbau/Anbau/Aufbau, in: archlab.docs #2, KIT Research Preprint, Karlsruhe 2018/19.

     
     

    We will soon be building houses out of mycelium?

    February 22, 2021

    Hebel, Dirk E., BILD der FRAU (2021), Nachgefragt bei WELTbewegern: Bauen wir bald Häuser aus Pilzen?, in: BILD der FRAU.

     
     

    OFFSPRING: The KIT material library

    February 17, 2021

    Hebel, Dirk E., and Böhm, Sandra (2020), NACHWUCHS: Die KIT-Materialbibliothek, in: ASF Journal 2020, p. 46.

     
     

    From breeding, cultivation, seeding and harvesting of biological building materials

    January 18, 2021

    Presentation of some projects of the symposium grow.build.repeat.

    Schimmelpfennig, Nadine (2021), Vom Züchten, Kultivieren, Säen und Ernten biologischer Baumaterialien, in: Deutsche Bauzeitschrift, Zukunftsfähig Bauen, January 2021, p. 40-43.

     
     

    100% Ressource: Bauten als Rohstofflager

    December 10, 2020

    Dirk E. Hebel (2020), 100% Ressource: Bauten als Rohstofflager, in: Sorge um den Bestand, Zehn Strategien für die Architektur, von Olaf Bahner, Matthias Böttger und Laura Holzberg für den Bund Deutscher Architekten BDA, Dezember 2020, p. 165-177.

     
     

    Materials science during studies

    November 10, 2020

    Dirk E. Hebel, Sandra Böhm (2020), Materialkunde im Studium, in: Der Entwurf – Magazin der DBZ für junge Architekt*innen und Ingenieur*innen, November 2020, p. 14-17.

     
     

    Recycling

    October 16, 2020

    Dirk E. Hebel (Referent), Markus Freitag (Podiumsgast), Barbara Bleisch (Moderation) (2020), Recycling, in: Auf Zeit – Architektur Forum Ostschweiz, Edition 2019, p. 153-174.

     
     

    The built environment becomes an urban mine

    October 16, 2020

    Hebel, Dirk E. (2020). Die gebaute Umwelt wird zur Urbanen Mine, in: Die Quadratur der Kreislaufwirtschaft – Weshalb eine Ökonomie der Kreisläufe auf gesellschaftliche Kooperation bauen muss, W.I.R.E., David Hesse, Simone Achermann. p. 16-27. Zurich, Switzerland

     
     

    From the circulating, sowing and harvesting of future building materials

    August 26, 2020

    Hebel, Dirk E. (2020). Vom Zirkulieren, Säen und Ernten zukünftiger Baumaterialien, in: Bauen im Wandel. Zukunft Bau Kongress 2019, BBSR. p. 74-79. Bonn, Germany

     
     

    Tremendous possibilities

    August 26, 2020

    Hebel, Dirk E. (2020). Ungeheure Möglichkeiten, in: der architekt. material der stadt. 4/2020 (Bund Deutscher Architekten BDA), Berlin, Germany

     
     

    Constructed from mycelium

    July 21, 2020

    Klaaßen, Lars (2020). Aus Pilz gebaut, in: Süddeutsche Zeitung. 18.07.2020, München, Germany

     
     

    The opportunities of the urban mine

    July 7, 2020

    Hebel, Dirk E. (2020). Die Chancen der urbanen Mine. Wie ein kreislaufgerechtes Bauen die Ressourcenfrage der Zukunft decken kann, in: PLANERIN. Mitgliederfachzeitschrift für Stadt-, Regional- und Landesplanung, p. 21-24. 3_20, Berlin, Germany

     
     

    Stark wie Stahl

    July 2, 2020

    Beck, Gabriela (2020). Stark wie Stahl, in: Süddeutsche Zeitung s.41, Nr.90, Bauen und Wohnen, 18./19.04.2020. München , Germany

     
     

    Changing Paradigms!

    March 19, 2020

    Hebel, Dirk E., Werner Sobek (2020). Changing Paradigms: Materials for a World Not Yet Built, in: The Materials Book, 139-141. Berlin, Germany: Ruby Press

    Hebel, Dirk E., Felix Heisel (2020). Culitvated Building Materials: The Fourth Industrial Revolution?, in: The Materials Book, 145-149. Berlin, Germany: Ruby Press

    Heisel, Felix (2020). Reuse and Recycling: Materializing a Circular Construction, in: The Materials Book, 156-160. Berlin, Germany: Ruby Press

     
     

    Pavilion made of recycled materials

    March 19, 2020

    KIT Karlsruhe (2020). Pavillon aus Recycling-Materilaien, in: Neuland, Innovation am KIT 2019, 2020. 40

     
     

    House building for the heirs

    March 19, 2020

    Hebel, Dirk E. (2020). Hausbau für die Erben, in: Südzeit, March 2020: no. 84, 8-9

     
     

    Showering as a school subject

    March 19, 2020

    Wüthrich, Christa (2020). Duschen als Schulfach, in: Bildung Schweiz, March 2020: no. 2, 29-32

     
     

    We’re running out of sand!

    March 19, 2020

    Prof. Dirk E. Hebel talks about the shortage of sand.

    Sakowitz, Sven (2020). Uns geht der Sand aus, in: HÖRZU Wissen, 19 th March 2020, No.2, 64-69.

     
     

    Build Sustainably and Act Future-Oriented

    February 25, 2020

    Interview with Prof. Dirk E. Hebel (2020). Build Sustainably and Act Future-Oriented. (Interview about his research as the head of the Department of Sustainable Building at KIT, specific challenges facing the construction industry concerning the reuse of materials and their sustainability and about the KIT being part of the SBM Summit taking place at Karlsruhe Trade Fair Centre on 18 and 19 June 2020.), in: stories, 01/2020: 22-24

     
     

    Die Stadt wird zum riesigen Rohstofflager

    February 19, 2020

    Ulrich Coenen (2020). Die Stadt wird zum riesigen Rohstofflager. (Second part of an interview with Prof. Dirk E. Hebel about the practice of urban mining, the energetic redevelopment of existing buildings and the establishment of new building materials and future energy efficient technologies.), in: Badische Neueste Nachrichten, 18th February 2020: no. 40, 17

     
     

    Diskrepanz zwischen Anspruch und Realität ist groß

    February 12, 2020

    Ulrich Coenen (2020). Diskrepanz zwischen Anspruch und Realität ist groß. (First part of an interview with Prof. Dirk E. Hebel about Sustainable Thinking, Acting and Building, technical and biological circulations, unmixed and pure construction methods and the application of urban mining.), in: Badische Neueste Nachrichten, 11th February 2020: no. 34, 17