International Perspectives on Sustainable Housing Development
Course Overview Around the world there is a significant and growing housing shortage that is exacerbated by rapid urbanization and population growth. This challenge demands innovative solutions that prioritize sustainability, occupant comfort, and efficient land use. This panel discussion brings together three internationally renowned architects: Francine Houben (Mecanoo, the Netherlands), Christophe Ouhayoun (KOZ Architects, France), and Geoff Denton (White Arkitekter, Sweden) to explore their approaches to sustainable housing. Each panelist will share their unique perspective on how to address housing shortages and sustainable densification, offering insights into the latest design strategies, materials, and technologies that can contribute to more resilient and equitable urban environments. Join us for a dynamic conversation that will delve into the future of housing and the role of architecture in creating livable, sustainable cities. Learning Objectives Understand how international architects approach sustainable housing development, including wood‑based construction, urban densification, and low‑carbon strategies. Compare differing regulatory, cultural, and construction‑industry conditions that influence mass timber, modularity, prefabrication, and approval processes in Sweden, France, and Canada. Identify urban‑design principles used to create healthy, community‑oriented neighborhoods. Course Video Speakers Bio Francine Houben Founding Partner, Creative Director Mecanoo, the Netherlands Francine Houben is founding partner of Mecanoo (1984) and has led the firm to success in The Netherlands and abroad, amassing a portfolio of work that is wide-ranging, inspired by global challenges and with a sustainable view on society. Mecanoo combines the disciplines of architecture, urban planning, landscape architecture and interior design to produce unorthodox design solutions born from a strong sensitivity to context and a highly interdisciplinary design process. Each of her projects illustrates the four fundamental elements of her architectural vision: People, Place, Purpose, Poetry. Francine Houben was professor of mobility aesthetics at Delft University of Technology and taught at the universities of Harvard, Yale and Mendrisio. As curator of the First International Architecture Biennale Rotterdam (2003), she brought the theme of the aesthetics of mobility to the forefront of international design consciousness. Francine holds Honorary Fellowships of the Royal Institute of British Architects (RIBA), the American Institute of Architects (AIA), the Royal Architectural Institute of Canada (RAIC) and was granted lifelong membership to the Akademie der Künste in Berlin as well as receiving the International Honorary Fellow Award by the Architecture Institute of Taiwan. In 2014 Francine was named Woman Architect of the Year by the Architects’ Journal and in November 2015 Queen Máxima of The Netherlands presented her with the Prins Bernhard Cultuurfonds Prize for her wide-ranging career. Francine was awarded Honorary Doctorates from the Université de Mons, Belgium (2017) and the Utrecht University (2016). In 2018 she received the BNA Kubus Award for her oeuvre; the International Prize, Prix des Femmes Architectes (2019) and distinguished with the TU Delft Alumnus of the Year (2020). In 2024, King Willem-Alexander appointed Francine Houben as a Knight in the Order of the Netherlands Lion. Christophe Ouhayoun Founding Partner Architect KOZ Architects, France Christophe Ouhayoun is a graduate of the École Nationale Supérieure d’Architecture de Paris-Belleville. He currently serves as a State Architect Advisor in the Aveyron department. In 1999, he co-founded KOZ Architectes with Nicolas Ziesel. A pioneer in wood architecture since 2001, he recently delivered Lot E of the Paris 2024 Athletes’ Village as co-coordinator within the Nexity-Eiffage team. In addition to his architectural work, he co-founded: KOZTO, a workshop dedicated to the creation of up-cycled furniture. PLAN01, a collaborative “”second office”” active from 2003 to 2014, in partnership with Atelier du Pont, BP Architectures, and Philéas. PLAN02, an integrated environmental consulting firm. Alongside his private practice, Christophe Ouhayoun works as a visiting professor at the École Nationale Supérieure d’Arts et Métiers and at the École spéciale d’architecture de Paris. Geoff Denton Partner Architect White Arkitekter, Sweden Geoff Denton is an architect and urban designer who has led residential, educational and mixed-use urban design and architectural projects across the UK, Europe and North America. Educated at Sheffield University in the UK, his career in Sweden notably led him to the role of lead architect for the implementation of Greenwich Millennium Village for Ralph Erskine Architect. This project marked the beginning of his focus on socially and environmentally sustainable urban development and regeneration. He joined White Arkitekter in 2011 and is now a partner and member of the board of directors. During his time at White he has led award winning urban design projects and was responsible for starting White Arkitekter’s London Studio. The studio has been built on the goal to share knowledge and experience of sustainable development and offsite fabrication methods used throughout the Nordics. Key projects developed during the first years of the London studio include the Climate Innovation District in Leeds and the Gascoigne estate regeneration in London. Geoff is now based in Stockholm where he works with diverse complex international projects. His approach to architecture is collaborative and he strongly believes that good design solutions are very much about creating places where people feel secure and invigorated.
A Zero Carbon Hybrid Wood Supertall Future
Course Overview With buildings generating 40% of global carbon emissions, we need to achieve net-zero by 2050 to meet the Paris Agreement target and limit global warming to 2°C. Timber sequesters an average of 1.9 metric tons of carbon-dioxide equivalent emissions per cubic meter (Sathre & O’Connor, 2010). While a purely mass timber tall building may not be the most cost-efficient solution, a hybrid structure can maximize the overall use of wood by volume in the most cost-efficient manner. Floor systems in buildings contribute as much as 73% of the environmental impact of a high-rise building’s structure (Lankhorst et al., 2019), making them an excellent target for reducing embodied carbon. DIALOG’s patent- pending Hybrid Timber Floor System (HTFS) takes advantage of the benefits of cross-laminated timber (CLT) combined with pre-stressed concrete to achieve a 12-metre column-free span. The HTFS is proposed as part of our Hybrid Timber Tower, a 105-storey mixed-use prototype that is being evaluated and tested by DIALOG and EllisDon. The prototype structure consists of the hybrid timber floor, combined with a concrete core and an external steel frame. Fire safety is achieved in the floor panels as the exposed wood chars to form a protective layer, while the non-combustible concrete and steel band continues to support the panel. The exposed CLT panels also provide a biophilic appeal, which has shown to support cognitive function as well as physical and psychological well-being (Vidovich, 2020). DIALOG, EllisDon, FPInnovations and other partners have completed the first phase of small-scale testing on over 40 panels. We are scheduled for fire testing of the panels in Ottawa with NRCan this fall with full scale testing of the 12-meter panels starting in late 2022. Learning Objectives Describe how hybrid mass timber systems—such as the Hybrid Timber Floor System (HTFS)—reduce embodied carbon and support zero‑carbon goals in high-rise, mixed-use developments. Explain the structural, fire safety, and performance characteristics of hybrid CLT–concrete floor assemblies, including how charring, concrete bands, and steel elements contribute to long-span capability and code compliance. Evaluate the role of multidisciplinary research, prototyping, and large-scale testing in validating hybrid timber technologies for supertall applications, including their impacts on sustainability, biophilia, and cost efficiency. Course Video Speaker Bio Craig Applegath, BSc, BArch, MArchUD, PPOAA, AIBC, NSAA, AIA, FRAIC, LEED® APBD+C Founding Partner & Architect DIALOG Craig Applegath is the founding principal of DIALOG’s Toronto Studio, and a passionate designer who believes in the power of built form to meaningfully improve the wellbeing of communities and the environment they are part of. Since graduating from the Graduate School of Design at Harvard University with a Master of Architecture in Urban Design Craig has focused his energies on leading innovative planning and design projects that address the complex challenges facing our communities, as well as on his advocacy of sustainable building design and urban regeneration and symbiosis. Craig’s area of practice includes the master planning and design of institutional projects, including post secondary education, healthcare facilities, as well as the design of innovative mixed-use- facilities. Craig was a founding Board Member of Sustainable Buildings Canada, a Past President of the Ontario Association of Architects, and the current moderator of SymbioticCities.net. Craig has lectured or taught at Harvard, the University of Toronto, the University of Waterloo, as well as at many professional and sector related conferences around the world. In 2001 Craig was made a Fellow of the Royal Architectural Institute of Canada for his contributions to the profession of architecture. In 2017 he was presented with the OALA Honourary Membership Award for his contributions to the cause of landscape architecture in Ontario. Neel Bavishi, PEng, CEM Building Performance Analysis, Associate DIALOG Neel is passionate about applying the art and science of building performance simulation and data-driven design to produce positive outcomes for the built environment. He embraces holistic solutions that minimize the environmental impact of building assets while providing enhanced value to building owners, developers, policymakers, and designers through improved well-being and reduced total cost of ownership. Neel believes that an integrated and collaborative approach that incorporates diverse perspectives is essential for delivering high-performance buildings. A mechanical engineer by training, Neel is well-versed in whole-building energy modelling for both new and existing buildings and lifecycle cost analysis, design optimization, and data visualization. His experience includes developing energy models for green building certification programs, carbon-neutral retrofit studies and district energy strategies, and the development of net-zero energy and emissions policies and standards for municipal, provincial, and federal government bodies. His projects span various asset classes, including recreational facilities, commercial high-rise towers, multi-unit residential buildings, hospitals, data centres, and transit facilities. He is a licensed Professional Engineer in the province of Ontario and is a Certified Energy Manager. Cameron Ritchie, PEng, PE, PhD, BSE Structural Engineer, Associate DIALOG Cameron is an Associate on the Structural Engineering team in DIALOG’s Toronto studio. Since graduating with a PhD from the University of Toronto, Cameron has acted as a structural design engineer and project manager across a variety of sectors and project types, including healthcare, institutional, government, and retail. He has experience in all stages of a project delivery, from feasibility studies through construction administration and management. Cameron is DIALOG’s project manager for the hybrid timber floor system (HTFS) research program, working closely with industry partners EllisDon. He is passionate about exploring mass timber wherever possible as a sustainable solution to our building needs.
