Les Canaux: eco-rehabilitation in a circular, innovative and humanist economy
- Building Type : Office building < 28m
- Construction Year : 1882
- Delivery year : 2022
- Address 1 - street : 6 quai de la Seine 75019 PARIS, France
- Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
- Net Floor Area : 797 m2
- Construction/refurbishment cost : 1 383 000 €
- Number of Work station : 15 Work station
- Cost/m2 : 1735.26 €/m2
Primary energy need
(Calculation method : RT existant )
From the services of Les Canaux to the association Les Canaux
The building "des Canaux" was built in 1882 for the administration of Les Canaux services in the 19th arrondissement in Paris. In 2010, the administration left the premises. In 2016, the City of Paris decided to turn the building into the Maison des Économies Solidaires et Innovantes, a showcase for the circular economy, supported by the association Les Canaux.
Chaired by Yann Arthus Bertrand, the association advises, trains and supports economic actors committed to solidarity and the planet, in France and internationally. It offers concrete tools to all those who wish to develop their social and environmental impact in their work or business.
In 2017, the City of Paris made the building available to the association to develop its activity.
The building needed to be renovated and adapted, and the City of Paris decided to make it an exemplary work site, in terms of the environment, particularly the circular economy, and solidarity. In Paris, the building sector accounts for 80% of energy consumption and more than 20% of the carbon footprint and produces around 1.9 million tonnes of waste per year.
Phase 1 of the works - 2016-2017
Phase 1 of the works concerned the interior refurbishment of the first and second floors, now used as offices. 95% of the materials, products and equipment used were reused, bio-based and/or eco-labelled. 95% of the materials, outgoing products and waste from the site were reused or recycled. The City of Paris, which acted as project manager and project supervisor, won the Territoria de bronze award in the "Public Space Development - Urban Planning" category from the Observatoire National de l'Innovation Publique in 2018 for this work.
Phase 2 of the work - 2020-2022
In March 2020, the City of Paris signed a design-build contract to launch phase 2 of the renovation of the Maison des Canaux with the same objective, a building that is as virtuous as possible, particularly in terms of the circular, social and innovative economy. The consortium headed by the Grand Huit architectural firm was selected. The building site was handed over at the beginning of March 2022 after one year of work.
The programme of works for phase 2 consists of:
- improving the building's energy performance (insulation, ventilation and innovative heating);
- creating an outdoor terrace with a pergola, allowing the extension of the Canals' activities and integrating an access ramp for accessibility for all;
- redesigning the ground floor and the basement to improve the reception of the public and the functionality of the building.
The design-and-build contract amounts to €1.7 million (including tax), for which the City has received 3 co-financing sources: the stimulus plan (€465,000), the Ile de France Region (€18,000) and the Parisian participatory budget (€100,000).
The project develops many innovations:
- a pioneering building in reuse and unique in France, with the majority of the works made from second life materials exclusively from the Ile-de-France region. It is worth noting that more than 90% of the terrace is made of reused materials, including the metal structure of the shell;
- the installation of natural ventilation with heat recovery, a very rare example in rehabilitation;
- the rehabilitation of a traditional Parisian interior insulation technique, plaster on wood lath, thanks to a fire resistance test;
- a major mobilisation of SSE structures in the Ile-de-France region: in the project management team, the craftsmen suppliers and the works companies.
- A recovery rate of more than 90% for materials and waste.
An atypical and local grouping
Rare in projects of this scale, the design-build contract has enabled a unique collaboration in the service of responsible construction.
The Grand Huit architectural firm, leader of the winning consortium of the design-build contract, has placed the human element and the preservation of resources at the heart of its practice. It formed a group of project managers and craftsmen, mostly from the Social and Solidarity Economy, who worked hand in hand from the project's outline. The majority of the cost of the work was allocated to two integration companies in eastern Paris (Travail et Vie and Apij-Bat). The other companies in the contract, their subcontractors and suppliers, also located in an area close to the project, are key players in the field of reuse and solidarity in the Ile-de-France region.
The Grand Huit architectural firm was the perfect conductor of the operation, and succeeded in creating a poetic and sensitive architecture from its values.
Key partners in the success of the project
To carry out this operation, the City of Paris was assisted by Tribu Energie in improving energy performance and installing renewable energy heating, from the development of the programme to the acceptance of the work, and in assessing the building's greenhouse gas emissions (construction products and energy) and the carbon gains from reuse.
It is also supported by Ekopolis as part of the Bdf - Bâtiments durables franciliens (sustainable buildings in the Parisian region) approach, a support, evaluation and learning system for construction and rehabilitation operations. The project was awarded the Bdf Gold level, the highest recognition of the support system, in the design and implementation phases.
Bellastock, in the framework of the European project Facilitating the circulation of reclaimed building elements in Northwestern Europe (FCRBE), contributed its expertise on the insurance of the reuse of metal beams, donated by Est ensemble and Sequano. This feedback was presented to the European partners in Brussels by the City of Paris.
Inter-site synergies have been set up internally by the City of Paris and with many other contracting authorities to recover reused materials. In particular, the APHP, Est-Ensemble and its developer Sequano, Seine Saint Denis Habitat, the RIVP and Elogie-Siemp have contributed to the project through their donations. The physical and digital reuse platforms were also widely solicited.
The Centre Scientifique et Technique du Bâtiment (CSTB) conducted the fire test, which made it possible to experiment with a thermal screen composed of 100% bio-geosourced materials from the Ile-de-France region, wood lath and plaster coating, and thus to do away with the metal lattice, which has a heavy carbon impact, imposed by fire safety regulations.
This demonstrator also has an educational purpose. Various site visits have been carried out. They have enabled about a hundred Parisians to visit the site and more than 50 employees of the Parisian community.
The City of Paris worked with the service provider Wild Time Records to capitalise and formalise the lessons learned from this operation in various communication media (article, video, motion design). These materials are available on the website: passerelle écologique paris, a platform dedicated to eco-responsible construction by the City of Paris.
Circular building paths
In order to perpetuate and develop circular economy practices and in particular reuse, the City of Paris (DLH), Les Canaux, Ekopolis and the Scop Grand Huit have experimented with a training scheme called "Les Chemins du Bâtiment circulaire" as part of this operation.
This is a theoretical and practical training course for the entire chain of actors, project owners, project managers and workers. The mix of participants, city employees and outsiders (landlords, architects, local mission, etc.), is sought to encourage the sharing of knowledge. For the first session, participants included City of Paris operations managers, social landlords, private architects, City of Paris masons and carpenters, and agents of integration companies.
Supported by the Ademe and the participatory budget, this scheme aims to be extended to other sites, including those of the City of Paris.
Mobilisation of the City of Paris employees
The City of Paris led the rehabilitation operation.
The project management team from the Housing and Habitat Department (DLH) received the City of Paris' internal innovation trophy in the ecological and climate challenges category in November 2021.
The DLH also worked in close collaboration with all the other departments. The operation once again revealed the abundance of professions and skills within the City of Paris.
Building users opinion
The occupants are very satisfied. Their needs have been taken into account and the philosophy of the work implemented highlights the association's missions.
See more details about this projecthttps://passerelle-ecologique.paris/
Thermal consultancy agency
BET heating ventilation water management
Association for the promotion of solidarity and innovative economy
BE reuse metal structure
Assistance to the Contracting Authority
AMO energy performance
Safety and health protection coordination
Travail et Vie
Cleaning, logistics, site life and sorting management - Integration company
Structural work and demolition
Finishing work - Work integration company
Général Métal Edition
Structural steelwork (subcontractor)
SARL David et fils
Exterior carpentry (subcontractor)
implementation of a load lift (subcontractor)
ASSOCIATION ELIPS - ECOLE LOCALE ET ITINERANTE DE LA PIERRE SECHE
Training in dry stone construction (subcontractor)
A Travers Fil
Realization and installation of a reused solid oak trellis for the fence of the outdoor terrace (subcontractor)
Manufacture and installation of end grain parquet (subcontractor)
eugenie.de.lariviere[a]gmail.com et geraldinetubery[a]orange.frhttp://les-resilientes.com/
manufacture of tapestry from reused carpet and draperies and curtains in reused fabric
Realization of macramé filling of the gates for the closure of the outdoor terrace (subcontractor)
Type of market
- 96,10 kWhep/m2.an
- 98,30 kWhep/m2.an
- 208,10 kWhep/m2.an
- 0,94 W.m-2.K-1
- Wood boiler
- Individual electric boiler
- No domestic hot water system
- No cooling system
- Natural ventilation
- Double flow heat exchanger
- Wood boiler
- Flooding/Slow flood
- Geotechnical drought (Clay soil shrinkage and swelling)
- Urban heat island
- medium sensitivity to the heat wave hazard => In response, the project creates an island of freshness by installing vegetation on the outdoor terrace. It improves summer comfort with the installation of blinds on exposed windows and shade veils on the terrace. The terrace pergola and plantings have been designed to facilitate the growth of shade climbing plants. The operation of the natural ventilation is adjustable allowing ventilation at night to bring freshness and closing the day to keep the freshness. Joinery has been changed with better thermal resistance. The interior insulation of the walls also improves summer comfort.
- high sensitivity to the hazard of drought and shrinkage swelling of clays -> In response, the recovery of part of the rainwater on site makes it possible to be economical in the use of drinking water and to compensate upstream for the drought risk
- strong sensitivity to the flood hazard -> In response, the project tries to mitigate the risks upstream with, in particular, the recovery of rainwater on site for watering the plantations and the water supply to the toilets. In addition, low-tech was implemented as soon as possible to make the building functional even in the event of a power cut due to flooding: natural ventilation, manual handling of removable systems (partitions, gates, blinds, etc.)
Construction and exploitation costs
- 171 330 €
- 1 383 000 €
- 583 000 €
Reuse : same function or different function
- Structural works
- Structural framework
- Indoor joineries
- Outdoor joineries
- Suspended ceilings
- Raised floors
- Metal beams (IPE, HEA, Tube, Purlin, Plates): 8.6 tons
- Metal beams (L and Flat): 2.1 tons
- Decking of the terrace: 80 m² (including 235 ml of joists)
- Low wall, calade (disabled access ramp), planters: 57 m3 of stones
- Rubble: 3 m3
- Topsoil: 2 m3
- Filling of portals: 5 km of climbing ropes
- Wooden trellis: 55 m²
- Shade sail: 90 m²
- Bar grid: 1 unit
- Bricks: 4 m²
- Removable partitions: 80 m²
- Ground floor insulation: 76 m² of wooden laths + 35 m² of MDF wooden base
- R+1 insulation: 200 m² of carpet covering + 270 m² of glass wool + 27 m² of MDF wooden base
- Glass wool ventilation ducts: 75.8 m²
- False ceilings Ground floor: 12 m²
- Furniture: Cupboard: 6 m², worktop: 1 unit, benches: 2 units,
- Doors: 10 units
- Hardware associated with doors and furniture: at least 10 handles, locksmithing...
- Sanitary: sinks: 1 unit, toilets: 2 units, basin/sink: 5 units
- Polycarbonate: 5.12 m²
- Windows: 3 units
- Shade sails: 90 m²
- Blackout curtains: 100 m²
- Blackout slats: 15 m²
- External blinds: 160 m²
- Floors: 27 m² of parquet, 45 m² of restored parquet, 4 m² of standing wood mosaic
- Baseboards: 70 ml
- Floors: 33 m² of terrazzo steps + 18 m² restored, 4 m² of concrete slabs,
- Wall tiles: 10.5 m²
- Electricity: 2P+E sockets: 36 units, RJ 45 sockets: 18 units; switch: 1 unit;
- Lights: LED strips: 11 units; light suspensions: 3 units; Spot light: 1 unit
- BAES: 15 units
- Electrical outlets: 66 units
- Switch: 4 units
- Electrical panel: 1 unit
- Cable trays: 32 m
- Faucets: 91 units
- Cork: 300 liters
- Radiator: 1 unit
- Sound diffuser: 3 units
- Light diffuser: 2 units
- Fire alarm panel: 1 unit
- False ceilings in parchment paper: 27 m²
- Steel beams (IPE, HEA, Tube, Panne) from a shed demolished by Sequano and donated by Sequano and Est Ensemble, transformed and adapted by GME
- Metal beams (L and Plats), steel decommissioned by the steel mills and bought by GME
- Dismantling of Parisian landing doors in oak wood from the work of the social landlords RIVP (donation) and Elogie-Siemp (donation) and from the Réavie platform (purchase), transformation into cleats and installation by Atelier R-ARE
- Dismantling of windows from a Parisian building site and transformation into moabi wood strips by Atelier R-ARE
- Stones (limestone and millstone) and rubble from the demolition of the building walls and reused on site for the base of the terrace by Travail et Vie
- Paving stones and kerbstones from the City of Paris platform and used for the low wall and the calade by Elips and Travail et Vie
- Topsoil from the site's planters (removal, amendment and repositioning) by Travail et Vie
- Filling of the gates: use of climbing ropes from sports shops and climbing centres recovered by Grand Huit and laid in macramé by Travail et Vie and Lauclem
- Dismantling of Parisian landing doors made of oak wood from the work of the social landlords RIVP (donation) and Elogie-Siemp (donation) by Atelier Rare and transformation and adaptation into trellis by A Travers Fil
- Creation of a flexible sail by Travail et Vie and Stu-Dio from PVC tarpaulins from the Réserve des Arts and installation by Travail et Vie
- Removal and re-installation at another location
- Removal and relocation of facing bricks.
- Creation of removable acoustic partitions from textile scraps from a tailor and an insulator made of recycled cotton by Les Résilientes and installation by Les Résilientes and GME (holding and lifting device)
- Wooden laths from African content wood supplied by Esiam, chestnut laths from the Le Bon Coin platform and oak wood from the ApijBat workshop: recovery and adaptation by ApijBat
- MDF wood base from a commercial event and installed by ApijBat
- Creation of a tapestry from carpets from trade shows by Les Résilientes and installation by ApijBat
- Purchase from the Réavie platform of glass wool and installation by ApijBat
- Recovery of MDF wood baseboards from an event and installation by ApijBat
- Purchase from the Réavie platform of glass wool and installation by ApijBat
- Recovery of wooden radiator covers from the Les Canaux house, adaptation and installation of false ceilings by ApijBat
- Synthetic material worktop bought on the Cycle up platform by Grand Huit and installed by ApijBat
- Paillasses given by the APHP of a Parisian building site and recovered by Travail et Vie and installed by ApijBat as office tables
- Doors: adaptation of the existing doors to the places reorganized by ApijBat and recovery of a door of re-use of another building site
- Recovery of handles and locks from the various doors and furniture to be reused
- Removal in conservation of 3 washbasins and 2 toilets by Travail et Vie and re-installation by ApijBat
- Purchase by Grand Huit of a double washbasin on the Silensi platform
- Purchase of a single sink unit by Grand Huit on the Cycle up platform
- Installation of a polycarbonate from an ApijBat workshop as overglazing on the ground floor
- Removal of double glazed windows in the ground floor and re-installation of these windows in another location by ApijBat
- Creation of blackout curtains from cotton (grandmother's sheet) by Les Résilientes
- Production by Travail et Vie and Studio of external blinds from plastic packaging sheeting from the Arts Reserve and installation by Travail et Vie
- Recovery of parquet flooring from a City of Paris site and installation by ApijBat
- Restoration of the existing parquet floor by ApijBat
- Removal and restoration of granito steps from a Seine Saint Denis Habitat demolition site by Travail et Vie, installation by Duarte
- Restoration of existing granito slabs
- Creation of concrete slabs from the walls of a car park on a Parisian site by Bégo réemploi and installation of the slabs as a floor covering by ApijBat
- Creation of standing wood and plaster mosaics from the remains of doors by Atelier Rare and installation of the mosaics on the floor by ApijBat and Atelier R-Rar
- Creation of skirting boards for the ground floor and first floor from dismantled doors by Atelier R-ARE
- Careful removal of cement tiles from the ground floor of the ground floor by Travail et Vie and re-installation of wall tiles in the bathrooms by ApijBat
- Production of terracotta tiles by Stu-Dio from planter soil and soil from the Grand Paris Express and installation by ApijBat as wall tiles in the bathrooms
- Realisation of slats to ensure ventilation and hide the hoppers, from carpets recovered from event fairs by Les Résilientes.
- Recovery of radiator grids from the Les Canaux house by Travail et Vie and adaptation and installation by ApijBat
- Recovery of sockets and a switch from Parisian building sites by and installation by SME
- Removal and installation of electrical sockets, switches, electrical panels, cable trays and sound diffusers by SME
- Removal and re-installation of BAES, a fire alarm system by SME
- Recovery of LED strips from a Parisian site and installation by SME
- Removal and installation of LED strips and light diffusers by MHE
- Purchase of hanging lights made from waste by Kataba and Cornichonstudio by Grand Huit
- Removal and installation of radiators and taps by Bosio
- Recovery of cork scraps from the R+1 insulation by Travail et Vie and use in the light screed of the granito steps by Duarte
- Removal and installation of the false ceilings in greaseproof paper of Fritz Jacquet Junior by ApijBat.
|Catégories||CO2 évité (kg)||Consommation Eau évité (m3)||Déchets évités (kg)|
|Aménagements extérieurs / Serrurerie - Métallerie||0||0||0|
|Couverture / Aménagements extérieurs||0||0||0|
|Equipements de génie climatique||0||0||0|
|Revêtements de sols||2008,295321||69,1387102||1340,53722|
|Revêtements de sols ou muraux||200,145||0,4378||2535,679586|
|Sécurité du bâtiment||0||0||0|
|Serrurerie - métallerie||556,0813636||3,45763418||703,7955718|
|CO2 évité (kg)||Consommation Eau évité (m3)||Déchets évités (kg)|
|Km en petite voiture||Nb de Baignoires rectangulaires||nb d'années de déchets ménagers d'un français|
- Scop d'architecture Grand Huit;
- SWiTCH: collective of engineers for the heating, ventilation, plumbing BET;
- Bellastock: cooperative society of collective interest (SCIC) of architects, AMOE reuse.
- Work and Life: “Help through work” association. It was responsible for the "Worksite life - Logistics - Sorting - Cleaning" lots, "Dry stone masonry and revegetation", "Wood work - Signage", "Textile works - locksmithing" and "Painting".
- Apij-Bat Cooperative: SA cooperative with a board of directors (judicial liquidation on 5/04/2022). It provided the "Plasterwork, insulation, floor and wall covering", "Exterior joinery" and "Covering" lots.
- Itinerant Local School of Dry Stone: training association in the technique of dry stone;
- Les Résilientes: association which is part of the Emmaüs Alternatives network and which produced the tapestries and slats in front of the hoppers from reused carpets, the blackout curtains and the hangings of the removable partitions from reused textiles;
- A Travers Fil: association of carpenters who made the trellis for the terrace from the components of the doors;
- Atelier R-ARE: member association of Construire Solidaire which ensured the dismantling of the doors, the construction of the decking of the terrace, the plinths and the mosaic in wood/plaster;
- Réavie: association that manages physical reuse platforms.
Indoor Air quality
- in winter, it recovers approximately 50% of the heat extracted;
- in summer, thanks to the inertia of the building, the association with the possibility of opening the windows, the large room reaches a level of hours of discomfort (resulting temperature higher than 28°C) of 14 hours per year for a continuous occupancy of 45 people.
Reasons for participating in the competition(s)
Le secteur du Bâtiment représente à Paris, 80% des consommations d’énergie et plus de 20% de l’empreinte carbone et produit environ 1 ,9 millions de tonnes de déchets par an dont un tiers environ part en enfouissement, principalement des matériaux et produits du 2nd œuvre.
Soucieuse de ces chiffres alarmants, la Ville de Paris s’est fixé des objectifs ambitieux dans son plan Climat 2050 pour rendre plus vertueuses nos constructions, qu’elle a traduit en 10 engagements concrets dans le Pacte de la Construction publié en 2021: restructurer plutôt que démolir, réemployer plutôt que jeter, recourir aux matériaux biosourcés, viser le zéro déchet enfoui, la sobriété énergétique, le bas carbone…
Pour cela, la Ville de Paris se doit d’être motrice sur son territoire pour développer et accompagner ces bonnes pratiques, souvent portées par des structures de l’Économie Sociale et Solidaire et encourager la structuration des filières de construction circulaire avec la mise en place de plateformes du réemploi, mais aussi proposer des lieux de découverte et de formation.
Ce sont les objectifs de cette réhabilitation, faire un projet exemplaire en la matière, prouvant qu’il est possible de rénover un bâtiment ancien avec des matériaux issus du réemploi, et d’en faire un équipement de grande qualité, fonctionnel et confortable.
Ce projet doit aussi sensibiliser les maitrises d’ouvrage et les Parisien.ne.s aux apports de l’économie circulaire dans la construction. C’est pour cette raison qu’un volet significatif est donné à la communication avec le site internet, et l'organisation de visites et à la formation, avec des chantiers participatifs et des temps de rencontres avec les équipes proposés tout au long du projet et l'expérimentation d'un dispositif de sensibilisation à destination de l'ensemble de la chaîne d'acteurs, Les Chemins du Bâtiment Circulaire.