en.Wedoany.com Reported - The French Scientific and Technical Centre for Building (CSTB) held its 2026 Research Day in Paris on June 2, focusing on the contribution of research to the renovation of the building stock. Researchers, public and local authorities, professional organizations, design firms, manufacturers, owners, and construction companies participated.
Building stock renovation is positioned as a priority task to address multiple social and environmental challenges, including adapting to climate change, improving comfort and health, promoting decarbonization, conserving resources, achieving housing for all, and fostering a better shared life. These complex issues require profound changes in buildings, practices, and mindsets, with research playing a key role.
In his opening address, Julien Hans, Director of Research and Innovation at CSTB, noted that the solutions needed to successfully scale up renovation already exist and are evolving, with knowledge and innovation continuously emerging, but the pace must accelerate. He emphasized that research is a key tool for accelerating transformation—an applied, persistent, field-based research connected to all stakeholders. The June 2 event shared progress and explored levers to accelerate the transformation of the building stock.
The conference highlighted key industry topics: data, knowledge, and renovation strategies at the building stock level; adaptation to climate change and summer comfort; indoor environmental quality and health; resources, materials, and building innovation (bio-based, earth-based, etc.); actual building performance and performance guarantees; occupant safety (fire, structural, and natural risks); industry chain transformation, skills, and business models.
The full day featured presentations and roundtable discussions covering topics such as explaining renovation strategies at the building stock level, measuring actual building performance, improving renovation reliability and quality, decision support and multi-criteria methods in renovation, the contribution of bio-based materials, structural risks and fire safety in existing buildings, innovation supporting renovation, and the structural evolution of the renovation market to sustainably address the performance and evolution challenges of existing buildings.
In his closing remarks, outgoing CSTB President Etienne Crépon stressed the importance of taking collective and multidisciplinary action to effectively address the challenges of building stock renovation and transformation. He stated that success is not determined by isolated innovations but by the gradual integration of multiple contributions, where everyone has a role to play, and this capacity for joint action will drive the response to the challenges faced.
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