Extending the Cycle in Switzerland

Situationsplan 0 5 10 20 50 m ? 85 One person’s waste is a resource for others In order to use this resource, the people that want to re-use materials must knowwhere to find them. Demand and supply have to be brought together. Lagerplatz Winterthur & the pilot project K118 In 2009, the Swiss Pension Fund “Stiftung Abendrot” became the owner of the site “Lagerplatz” in Winterthur. Since then, the prin- ciple of preserving, converting and reusing the buildings rather than demolishing them, has been applied. All architects working on the “Lagerplatz” are expected to use secondary building materials wherever possible. When planning the addition of three stories to the building K118, the project management (Klara Kläusler, Barbara Buser, Eric Honegger, Tabea Michaelis) wanted to comprehensively examine the idea of re-use: K118 was to be constructed with a maximum of reused building components. The “Stiftung Abendrot” agreed under the condi- tion that the building made from used materials does not cost more than a conventional buil- ding made with new materials. In order to make the experiment possible, “Stiftung Abendrot” approved 500,000 swiss francs in advance for the procurement of used materials. K118 and its significance The significance of the K118 pilot project for the reuse scene in Switzerland is large. The drawings and the first building components intended for reuse were shown in an exhibition of the Swiss architecture museum S AM in Basel. The Swiss Radio and TV reported on the project, even before a building permit had been issued. Various articles and interviews appeared in newspapers and trade journals. Step by step The idea was born: a three story addition to the existing building K118 on the “Lagerplatz” in Winterthur. An addition, made from a maximum of reused material from nearby dismantled buil- dings. But what will it look like? How do we want it to look, which architectural language should it speak? Which buildings will be dismantled and taken down in the relevant window of time? Who owns these buildings and will the owners allow us to use their materials? Who can dismantle the materials and which materials can be dismantled and reused at all? Where can we store them? The components we can’t evaluate ourselves, who will evaluate and test them for us? What are the official and legal requirements and how can we fulfill them - or are some things simply impos- sible? This is a new process, what will people think of it and will they be supportive? In a rolling process, the planning and the finding of the materials went hand in hand. Baubüro in situ ag Since its foundation in 1998, baubüro in situ has a focus on renovations, extensions, additions and conversions. Rather than planning new buildings as most architects do. The idea of reuse has been applied to entire buildings and industrial sites for over 20 years. Thus, the baubüro in situ was well prepared for the next challenge: creating new constructions out of reused building materials. Looking back: Bauteilbörse Basel & Bauteilnetz Schweiz In1996, BarbaraBuser andKlaraKläusler founded Bauteilbörse Basel and the umbrella organization Bauteilnetz Schweiz. They developed a database to offer used components for reuse via www. bauteilnetz.ch. With this platform, it was possible to find a further use for about 10% of the offered components: Good, but not good enough. The virtual offer did not satisfy the wish of the buyers to see and touch the components themselves. In consequence, the idea of reuse was coupled with an employment program for jobless people, and in the past 25 years thousands of components have been sold. Looking forwards: Re-Launch Bauteilnetz - Cirkla Over the years, the importance of the network “Bauteilnetz” has diminished. In September 2021, the time was ripe for a re-launch and a new name: “Cirkla”. The Board of the the swiss wide network ranges from owners of upcycling companies to professors. Recently the BAFU (Swiss Federal Office for the Environment) spoke a subvention to create a nationwide website for all actors of reuse: architects, builders, craftsmen, designers,... This website is currently under construction. Treppe Orion Zürich Granitplatten Orion Zürich Dachaufbau Ziegler Druckerei Winterthur Fassade Blech Ziegler Druckerei Winterthur Fenster Ziegler Druckerei Winterthur Fenster Werk 1 Winterthur Fenster Orion Zurich Stahlstruktur Zellweg Uster nothing but local: re-used or regenerative Team: Main authors Barbara Buser : Project Initiator. Barbara holds a degree in architecture and sustainable cons- truction. She is a legend in sustainability, socially beneficial urban planning and innovative interim use concepts. Marc Angst : Co-Project Management. Marc is an urban planner with a focus on sustainable design. At baubüro in situ ag, he works as project manager. He is a true expert in reuse, be it whole buildings or its components as well as circular construction. Pascal Hentschel : Co-Project Management. Pascal is an architect and has been working for baubüro in situ as a project manager since 2014. He is particularly involved in the process development and implementation of strategies of reuse and circular construction. Benjamin Poignon : Project Architect. Benjamin completed a double degree in architecture and civil engineering. Since 2018, he has been an employee at the baubüro in situ construction office, specializing in circular construction and reuse. Kerstin Müller : Sustainability Consultant. Kerstin is an architect with a long history of and passion for sustainable design principles. She has worked at baubüro in situ since 2013 and is part of its executive board. Kerstin is co-director of the start-up Zirkular GmbH. Michele Brand : Draftswoman. Michele is a draftswoman with a strong focus on sustainable construction methods and regenerative mate- rials. She is an expert in straw and clay based construction. Further authors: Katrin Pfäffli : preisig:pfäffli Architekturbüro K. Pfäffli, Zurich Michael Pöll : Office for Sustainable Construction, City of Zurich Martin Zeller : Artist, photographer Building owner: Swiss Pension Fund “Stiftung Abendrot” is an independent Swiss pension fund founded in 1984. 24 Lagerplatz Zur Kesselschmiede Facade studies Façade studies were used to experiment with various architectural formulations and materials. The first variant studies were partly based on existing, realised reuse projects. The ideas of materialisation were further developed on the basis of the local conditions and the reclaimed material that was found. When implementing reused material, it is important to remain flexible. Architectural designs without tolerance make the use of reused material difficult. It is important that an architect understands the design with reuse material as a creative challenge. K118. Extending the Cycle in Switzerland baubüro.in.situ.ag. -.Basel.Zurich.Liestal.Rheinfelden - Global.Lafarge.Holcim.Awards.2021 - K118.Extending.the.cycle.in.Switzerland - baubüro.in.situ.Zurich - Hohlstrasse.400,.CH-8048.Zurich - +41.44.451.98.80 - info@insitu.ch - www.insitu.ch - 1/5

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