Nursery school of Boutours

Kindergarten of 9 Classes made by recycling and extension of a market hall of the year 2000. The building is made of organic wood and straw (caissons, between-uprights and carrier) and earth-level passive and anticipating climate change. It is participative, citizen and educational:

• Through the mobilization of several classes of schoolchildren for the design and creation of mosaics on the theme of biodiversity.-by the participation of 90 citizens who made 4000 bricks of mud forming the building partitions.

• By the different formations (pro-straw, earth, airtightness ..) given on the occasion of the construction of the building.- by its social aspect by involving very widely, especially for the straw carrier a company of insertion.

The materials are almost all bio-based or geosourced (from the painting to the roof through the structure) with a particular attachment to the health of the most fragile users that are our children (0 VOC, Co2 sensors in each class ..) .The building is "very low carbon" by its materials and its heating mode (mass stove and wood boiler). It harbours biodiversity and urban agriculture. It boosts the local associative and economic fabric (the company the furthest was 90 km away)
Its ecological, architectural and civic quality has been widely recognized and awarded by various juries covering different aspects of construction:
- Wood construction price at the regional and national level - BDF Gold level with 93 out of 100 points - First element in the price of the best average city for Biodiversity.- Territoria d'or- Eco-action trophy ...

He is also recognized by various invitations to share his exemplary nature (Assises nationales de la construction bois, Forum international du bois, Printemps de l'éco-construction, Conférence Green building du moniteur....)

This building made it possible to win two calls for national research projects from ADEME, one on natural ventilation with heat recovery, the other on straw in public access buildings.

Sustainable development approach of the project owner

For more than 12 years, the City has been committed to sustainable construction, the most advanced action in its agenda. Faced with the challenges of climate change and the depletion of natural resources, the Municipality is defending a model of territorial development that reconciles economic growth. , environmental preservation and social equity, the three pillars of sustainable development. From the famous 1992 Earth Summit in Rio, it was recalled that local authorities, through the equipment they manage, their skills and their proximity to the citizens, had a decisive role to act concretely in favor of sustainable development. It is for all these reasons that, on October 7, 2010, the Rosny-sous-Bois City Council voted its first Local Agenda 21. Forty actions are included. They are the declension of 5 priotaires axes: to encourage the eco-citizenship, to reinforce the dialogue and the solidarities, to respect the environment, to develop the city sustainably and to be an eco-responsible administration. The concertation being a key factor for the success of this approach, a new body, the Local Council for Sustainable Development was set up in November 2012. Agenda 21 was revised in 2013/2014 and a second action plan, consisting of 42 actions, was voted by the Municipal Local Council on 23 September 2014. The result of the work of the Local Council for Sustainable Development, it always translates the same ambition: to promote the "better living together" in Rosny.

Architectural description

The school of the Boutours is part of a continuous process of construction by the City of Rosny-sous-Bois, its nine classes, its leisure center, all of its amenities (dormitory, kitchens, refectory ...) are born of an architectural process, where the arche (the first rule) is eco-systemic equilibrium and where the tecton (constructive capacity) is the citizen collective imagination.

The idea here is not only to be neutral or positive vis-à-vis the entire energy needed for the production and consumption of the building. It is not, only, if it were possible, the idea of ​​fully integrating into a complete ecosystem cycle. The architecturerégénérative is, in order to advance in the path of this reintegration to the ecosystem, to be part of a fertile dynamic, a horizon, undessein enrich our world from human action. The architecturerégéraérative not only works matter, energy, their links but also all human phenomena.

On the occasion of the construction of the school of Boutours this objective we have obviously not reached. First of all, because regenerative architecture is not an end but a "becoming" that invites the journey. Secondly, in order to understand the problems and also the solutions, the important thing is to get on the road to this horizon. Finally, because if we are to recognize our present incapacity, the school is the place where the suite is elaborated. It is this sequence that we have tried to set in motion.

Innovate and experiment to go further in "sustainable development". Architecture, in its implementation, draws a consistent way of energy and matter in an eco-system already largely degraded. Our team, through its projects, is part of an attempt to equip the architecture with a capacity to destroy in no way the few resources that remain to share on earth, an attempt to make architecture a regenerative base of our ecosystem.

How:

as a continuation of the ongoing work on the other school projects of the City, carry out this project with strong regenerative objectives, in particular: a bioclimatic design tending towards the passive

the use of biobased materials

- wood, straw, earth, aiming to give this building a low carbon footprint

- the use of healthy local materials for our biotope and for the health of the children o the improvement of the controlled natural ventilation system, with heat recovery, which aims by the only shape of the building to reduce the share of technical elements that are not resilient, expensive and difficult to maintain

- the search for implementation of technologies of very low complexities

- the continuation of the participative approach in the construction process

- amplification of in situ training so that these new knowledge and know-how remain in the territory and form a first structure of territorial economy o reuse of "waste"

- the compensation of the energy consumed during the construction and use of the building

- the compensation of bio-based materials consumed.