Authors’ Comment
R-Urban consists of a series of ecological civic hubs that utilize urban land in a reversible manner, as part of participatory regeneration processes in disadvantaged neighborhoods. While previous regeneration models often lack physical spaces managed by communities, the establishment of these hubs fosters the development of local networks and closed ecological and economic circuits, encouraging collaborative and solidarity practices among citizens.
Recently, two R-Urban hubs were built in the suburban town of Bagneux in partnership with the City of Bagneux and local organizations. Agrocité focuses on urban agriculture, offering cultivation plots, training programs and cooking sessions featuring food grown on-site. Recyclab specializes in eco-fabrication and hosts initiatives centered on reduce/reuse/recycle, DIY projects, and upcycling workshops.
Sustainability
R-Urban buildings are designed to be reversible, meaning they can be easily dismantled and relocated. This principle of reversibility influences the architectural design process to incorporate construction techniques and materials that are easy to disassemble, transport, and reassemble. The materials used in construction are sourced from local and circular systems, including recycled items (such as wooden cladding, reused drying panels, and windows reclaimed from demolitions) and bio-sourced materials (like local wood, straw, and plant-based materials).
Another key objective for the R-Urban hubs in Bagneux was to minimize soil artificialization to preserve its permeability and reduce flood risk while maintaining soil biodiversity and fertility. Furthermore, they aim to enhance vegetation and support the presence of insects and birds by establishing biodiversity corridors. Various eco-devices were implemented to test the buildings' capacities for reducing, recycling, and generating ecological loops, including composting systems, dry toilets, green walls, grey water filtering systems, rainwater collection, passive heating. Together, these devices and construction principles have improved ecological parameters regarding CO2 emissions, water consumption, energy use, and organic waste reduction.
Aesthetics
The overall aesthetic of the buildings is characterized by simplicity and is heavily influenced by the RRR principles. This approach leads to minimalistic designs that prioritize functionality alongside a straightforward aesthetic. For instance, the use of polycarbonate honeycomb panels in the facade of Recyclab and the patio of Agrocité acts as a greenhouse, adhering to bioclimatic principles. The site represents a 'rural' enclave amidst a dense urban and industrial environment. Collectively, these strategies foster engagement and curiosity, which have been actively embraced by the users.
Inclusivity
The core idea of the R-Urban hubs was to engage citizens in the project's development at every stage, from design to management. Local residents participate in the co-construction of buildings and landscapes. The governance structure encourages citizen involvement in site management. This approach enhances their adaptive capacity and potential for collective learning and action.