SEKOYA's fifth call for low-carbon & climate solutions has closed.


    The winning solutions of this call for solutions have been announced.

    The themes of the fifth call for solutions


    Deconstruction approaches and responsible water use


    The construction sector has an important role to play in the ecological and energy transition. The building industry is indeed one of the two sectors that can have the biggest impact in terms of climate change mitigation, with a 66% potential reduction in greenhouse gas emissions by 2050, as Le Moniteur reminds us.

    This is why it is essential to renew construction practices by adopting eco-design, - which takes into account all stages of the building's life cycle,
    from its construction to its dismantling, knowing that materials often represent between 40 and 60% of the emissions of the construction of a structure -, and by deconstructing existing buildings in a careful and methodical way in order to recover and recycle materials as best as possible and thus preserve resources that are sometimes non-renewable or whose availability is not infinite. In this regard, the European Taxonomy regulation, which encourages sustainable activities, stimulates eco-design upstream and expertise in deconstruction and recovery of materials in all their forms downstream.

    With the launch of this 5th call for solutions, the Sekoya Club intends to promote the “deconstruct to build better” approach.

    In parallel, and considering current events, the corporatepartners have decided to focus on a second theme: “water and its responsible uses”. Drought episodes arebecoming recurrent in France. On a European level as well as on a global level, more and more regions are affected by the lack of water due to climate change. Implementing water-saving devices, allowing, or encouraging the use of grey water or rainwater, a resource that has been neglected in France until now, or exploiting the potential of water to help with heating and cooling are all virtuous approaches.
    Sobriety in construction, energy sobriety and water sobriety go hand in hand.



    Two themes have been chosen this year by SEKOYA corporate partners for this fifth call for solutions:



    1. Deconstruct to build better:

    • Ecodesign: materials, products and construction processes (modular, reversible, change of use, repairable)
    • Revalorization of resources from selective deconstruction
    • Tools and processes to support eco-design and deconstruction sites

    2. Water and its responsibles uses:

    • Water saving: devices, awareness to reduce the pressure on the resource
    • Quality adapted to the use: revalue water in all its forms (gray water, rainwater)
    • Water energy: harnessing its potential to help heating and cooling


    The Carbon & Climate platform seeks to identify and qualify innovative, sustainable and low-carbon solutions through an online application process. Eiffage and its partners will qualify the most effective solutions (via a carbon footprint statement and a life cycle analysis) with a potential to contribute to a more frugal construction.

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    The platform is technically operated and hosted by the Impulse Labs accelerator, an actor experienced in identifying innovative solutions since its creation.


    New Forms of Mobility

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    • Optimise mobility fluidity in congested urban areas (signage, digital control, adaptation to real flows...).
    • Enhance the attractiveness and intuitive understanding of public transportation offers for all types of users.
    • Promote low-carbon forms of mobility and urban land use.

    Biodiversity and Ecological Engineering

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    • Reintegrate nature into cities as a source of ecosystem services: creation of freshness isles, urban agriculture and short circuits, use of CO2 for agricultural purposes, etc.
    • Develop solutions to restore degraded natural areas (soil stabilisation, water infiltration, soil decontamination by plants, renaturalisation of mineral areas, etc.).
    • Tool to evaluate the quantities of stored biogenic carbon.

    Low-carbon Design and Implementation

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    • Systemise the use of low-carbon materials.
    • Propose an efficient, biosourced insulation for new and renovated buildings.
    • Develop industrialised solutions for energetic renovation.
    • Design buildings with scalable uses and without structural costs.

    Methods and Tools

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    • Absorb CO2 in cities and rural areas by reintroducing green spaces into our projects.

    Circular Economy

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    • Develop rapid resource diagnostic solutions designed used before existing buildings' demolition.
    • Develop physical and/or virtual exchange systems between supply and demand for land, materials, equipment, etc.
    • Develop solutions for on-site reuse of concrete and aggregates in construction, infrastructure, treatment of deconstructed materials before reuse, etc.

    Renewable Energies and Energetic Performance​

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    • Propose upstream diagnostic systems for the use of local renewable energies.
    • Develop any energy-saving solution.
    • Develop new solutions for renewable energy production and recovery.
    • CO2 capture processes.
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