Contractor

Name : AU BERCAIL pico-promotion immobilière

Contact : Sarah COHEN et Claire LUCAS - contact[a]au-bercail.eu

 https://au-bercail.eu

Construction Manager

Name : KAYAK architecture

Contact : Blandine et Xavier PATRIARCHE - contact[a]kayakarchitecture.fr - 04.79.71.43.12

Stakeholders

Function : Company

ZANON charpente

Jean Baptiste MAUFRAIS - jean-baptiste.maufrais[a]zanon-charpente.fr

 http://zanon-charpente.fr/


Batch frame, roofing, reuse of wood

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Function : Other consultancy agency

Laure Bal

Laure Bal - laure[a]bal-economiste.fr - 04.79.84.22.68

 http://www.bal-economiste.fr


Economist

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Function : Others

Energies Libres

Thomas Perrissin-Fabert

Realization and operation of the collective wood pellet boiler room (OKOFEN) for the sale of heat

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Function : Company

Greg Constructions

Pierre BETEND - pierre[a]gregconstructions.com

Batch GO, reuse of stones for building the surrounding wall

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Function : Company

MILLET PAYSAGE

Adrien Quay Thevenon - adrien[a]millet-paysage.com

 https://millet-paysage.com/


VRD lot, reuse on materials for exterior fittings

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Function : Company

SERRURERIE TAILLEZ

Jimmy TAILLEZ - serrurerie.taillez[a]gmail.com

LOCKSLOT lot, reuse of railings for street fence

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Function : Others

SOCOTEC

Olivier SOULAN - olivier.soulan[a]socotec.com

 https://www.socotec.fr/


Technical controller

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Function : Other consultancy agency

ANNECY STRUCTURES

Anthony DIETRICH - anthony.d[a]annecystructures.com - 04.50.05.06.25

 https://www.annecystructures.com/


BE structures, contribution to technical solutions for the reuse of wood in structural elements

Contracting method

Off-plan

Type of market

Not applicable

Allocation of works contracts

Separate batches

Energy consumption

• Primary energy need : 74,00 kWhep/m².an

Calculation method : RT existant

Breakdown for energy consumption :

• Heating: 33.2
• DHW: 31.6
• Lighting: 4.4
• VMC auxiliary: 4
• To. cast: 0.5

Envelope performance

Indicator : n50

• Air Tightness Value : 1,68

Systems

Heating system :
• Water radiator
• Wood boiler
Hot water system :
• Wood boiler
Cooling system :
• No cooling system
Ventilation system :
• Humidity sensitive Air Handling Unit (Hygro B
Renewable systems :
• Wood boiler
• Renewable energy production : 83,00 %

ÖkoFEN automatic wood pellet boiler, 18kW power, and 4-ton compact Flexilo.

Biodiversity approach

Conservation of the two main tall trees present on this small urban wasteland and taken into account in the composition of the project and the location of the building (morello cherry and paulownia).

Planting:

• More than 40 shrubs to create a diversified and rustic hedge favoring species with small fruits for birds and flowers for pollinating insects;
• Climbers on the surrounding walls: Virginia creepers, honeysuckle, knotweed, vines;
• Willows and irises in the rain garden (integrated stormwater management).

Mitigation actions on soil and biodiversity :

Conservation and protection of the site's topsoil for restoration at the end of the work.

Risks

Hazards to which the building is exposed :
• Flooding/Runoff
• Urban heat island

Risks measures put in place :

In addition to the thermal performance of the building, the project has no waterproofed surface apart from the roof, the tall trees present on the site have been preserved, and numerous plantations have been planted to promote shade and an island of urban cool.

On the street a climber has been planted and in agreement with the city, the immediate approach to the building has been planted as part of the "living sidewalks" approach.

To respond to the risk of flooding by runoff, the standard of living is 0.80 cm above the TN and the garden modeled to create a rain garden to manage rainwater.

Urban environment

The project was designed to limit the social and environmental impacts in the neighborhood. Constructability has not been maximized to find a level of reasoned densification in accordance with the existing built environment, preserving the two most beautiful trees on the land, allowing the development of a real city garden for future inhabitants.

• Land plot area : 767,00 m²
• Built-up area : 268,00 %
• Green space : 499,00

Construction and exploitation costs

• Total cost of the building : 755 000 €

Circular economy strategy

Phase in which reuse has been integrated : Preliminary design studies

Type of circular economy strategy implemented :
• Targeting a few diversified products for testing
Type of circular economy strategy implemented :

A resource diagnosis was carried out upstream before selective deconstruction, making it possible to identify materials reused or reused in the project. Approach supplemented by solutions for exterior fittings during construction.

Quantified targets for reuse? :

Objective to exit without added value compared to a "new" solution

Integration of reuse into the written contract documents : Integration of the approach in the general clauses

Validation protocol for reused materials : Yes

Validation protocol for reused materials :

Mentions of reuse and/or recovery have been entered in the CCTPs. The companies were made aware of the reuse approach at the start of the construction site.

For locksmithing: validation of the technical feasibility with the craftsman

For the structural timber of the carport: validation of feasibility with the company, BE structure and technical controller

Deposit validation form : No

Reuse : same function or different function

Batches concerned by reuse :
• Structural works
• Structural framework
• Locksmithing-Metalwork
• Outdoor joineries
• Landscaping

For each batch : Reused Materials / Products / Equipments :

FRAMEWORK Batch

Structural timber stored in the demolished building:

• 12 beams, 100x200 by 5 m
• Reused for the framework of the carport with 5 parking spaces


Cast iron dolphins from a demolition site of the OPAC Savoie:

• 3 pieces, 3ml
• Reused for EP descent


Louvered wooden shutters of the demolished building:

• 4 rooms
• Reused at the level of the slatted façade at the street limit

 

LOCKSLOT lot

• Railing of the demolished building with barraudage
• 8ml
• Reused as a street fence



VRD batch

Concrete curbs from a demolition site of the OPAC Savoie:

• 14 units, i.e. 0.4m3
• Reused to delimit the courtyard from the vegetable garden

 

Single twist wire mesh disassembled on site:

• 45ml
• Reused on new separating boundary


Cast iron grids for rainwater at the level of the old demolished gate:

• 5 pieces, 2.5ml
• Reused at the start of each vegetable strip


Large stones under base portion of demolished enclosure wall:

• 6 units
• Reused on site in garden seating and stepping stones



EDP tank from Valorist shipyards:

• 1, or 1.2 m3

 

Composter from Grand Chambéry

• 1, or 1 m3
• Model slightly damaged at the level of the lid that cannot be distributed

 

Batch GO

• Stones from the portion of the perimeter wall demolished for new pedestrian and car access
• about 4 m3
• Reused on site to reconstruct the surrounding wall at the site of the old gate.

Reused materials rate :

FRAMEWORK Batch

• Structural timber stored in the demolished building.
• 12 beams, 100x200 by 5 m
• Reused for carport frame 5 parking spaces.


The wood was made available to the carpenter on the ground before the demolition of the building to facilitate its removal. The company stored this wood. The plan of the carport was established taking into account this material to be reused with a dialogue between architect / structural engineer / carpenter / technical control engineer. The carpenter was proactive and involved himself very positively in this process. Long-term storage, edging and the size of the wooden elements allowed us to maintain the price established with purchased wood.

https://www.dropbox.com/s/ao0fu0pczljpgkw/r%C3%A9emploi%232.jpg?dl=0

https://www.dropbox.com/s/8dpo7fn9k920mj6/IMG_4849%202.jpg?dl=0

https://www.dropbox.com/s/fee0t1reju774gr/IMG_1893.jpeg?dl=0

 

LOCKSLOT lot

• Railing of the demolished building with barraudage
• 8ml
• Reused as a street fence


The guardrail was made available to the locksmith on the ground before the demolition of the building to facilitate its removal. The company stored this element before carrying out the necessary repairs to transform it into a fence (change of angle, installation of fixing plates on the sideboard wall, treatment and painting). The reuse of this element was possible thanks to the downgrading of the field of use from guardrail to fence. The long-term storage, cleaning and necessary recoveries allowed us to align ourselves with the price of a new fence meeting the requirements of the Architecte des Bâtiments de France. The craftsman was enthusiastic about doing this rework.

https://www.dropbox.com/s/85unbnmhxobnek9/r%C3%A9emploi%233.jpg?dl=0

Batch GO

• Stones from the portion of the perimeter wall demolished for new pedestrian and car access
• about 4 m3
• Reused on site to reconstruct the surrounding wall at the site of the old gate.


The stones remained stored on the site for the duration of the work. The mason was satisfied to have this work of reconstruction of a stone wall, to integrate the mailbox block of the condominium. The stone copings were also put back in place. Only the labor was invoiced, aligning itself with what a concrete block wall to coat on both sides would have cost.

https://www.dropbox.com/s/p4oem8kiffv4b5x/r%C3%A9emploi%231.jpg?dl=0

https://www.dropbox.com/s/bk9c33fi8tsanx0/R%C3%A9emploi%234.jpg?dl=0

Logistics

Rehabilitation and reconditioning operations (if project concerned by a cleaning/demolition stage) : Yes

Storage of materials for reuse in situ (if project concerned by a cleaning/demolition stage) :
• On site, on a dedicated area not covered
• On an external platform, in combination with reconditioning operations
Storage of materials from external supply :
• No problem of storage, supply correlated to the progress of the works

Insurance

Consultation of the technical controller : Yes

Specific mission given to the technical controller :

There was no particular mission. but very constructive informal exchanges with a technical controller who is sensitive and interested in this subject.

Insurance broker on the project : Yes

Insurance broker : AGB courtage, sandrine Orlandini, s.orlandini[a]agb-assurances.fr

Consultation of the broker : No

Insurer : Albingia

Consultation insurer : No

Environmental assessment

Impacts avoided : water, waste, CO2 :

https://www.dropbox.com/scl/fi/90gmla6f6qtbx08762s4o/2022_Troph-esB-timentsCirculaires_Outil-calcul-d-impacts-diffus-version-1.xlsm?dl=0&rlkey=2gal3dyj38zto82ftbjemsolm

The reuse operation saved:

> more than 15 tonnes eq. CO2

> more than 263 m3 of water, i.e. 1757 bath fillings

> 23 tonnes of waste, i.e. 46 years of waste production by a household

> more than 126,000 km traveled by car, i.e. 143 Paris-Nice journeys.

Economic assessment

• Total cost of reuse : 9 000 €

Reuse quantified in the companies' offers? : No

Purchasing process for reused materials :
• Purchase by the company from a reuse platform
• Others
Purchasing process for reused materials :

Via the Materials Library ENFIN ! réemploi (Chambery): cast iron dolphins and concrete curbs

More details on the economic balance :

The reuse solutions have been negotiated with the companies so that it comes to the same price as what had been quantified as new in their offers.

New business model and financial balance :

No effect on the balance sheet of the operation.

Communication

Communication on the process : Yes

If so, please specify :

• Regular posts on LinkedIn.
• Visit of the project at the time of delivery: CAUE 73 for elected officials, technicians and architects, and a visit organized with the neighbors of the district.

https://www.caue-observatoire.fr/ouvrage/les-petits-paliers-chambery/

https://www.dropbox.com/s/cz9278dn7npx9m2/Chy%205198%20visit%20Les%20Petits%20Paliers%20pico-promotion.jpg?dl=0

• Participation with Kayak architecture in two round tables on the question of reuse: CAUE 73 and for the Cercle des Industriels et de l'Habitat de l'Arc Alpin.
   

https://www.dropbox.com/s/7f9odommgspzztk/CIH%20REEMPLOI_compressed.pdf?dl=0

Project visit : Yes

Circular design

Responsible consumption :

Housing project carried out on a small urban wasteland near the city center.

The project as a whole has tried to promote the connection between:

• On the project management side: work on the model template, taking into account the existing environment, work on the succession of thresholds: from the limit of the plot to the threshold of its accommodation, passing through the small landings, common private spaces that can be converted to the right thanks to the inhabitants.
• Porject management assistance side: proposal for sharing spaces with the common multi-use room (workspace, guest room, children's play area), the common wood boiler room, the garden and its vegetable patch, the bicycle shelter. Support for the inhabitants in the formation of the group: presence of the MO at the first meeting of the volunteer syndic, proposal for collective planting work on delivery of the building for the vegetable strips, the constitution of diversified hedges and plantations on the street.

Functionality economy :

When designing the project: one of the largest dwellings was offered as a 5-bedroom duplex or 4-bedroom apartment + an independent room to allow for a room with a shower room with independent access on the same floor for a bedroom or a work piece.

On the ground floor, the project includes an independent guest bedroom with bathroom, accessible to people with reduced mobility, belonging in equal shares to the inhabitants of the condominium, to allow family, friends to be received and for one night a week by a teacher on the move. A charter for the use of this room is appended to the co-ownership regulations.

Eco-design :

• Renewable energies: automatic boiler with wood pellets
• Water: infiltration of rainwater in rain gardens on the plot and recovery of rainwater for the vegetable garden in a tank bought second-hand.
• Materials: levels N1 and N2 in wooden frame, Austrian larch cladding on 2/3 of the facades, wooden joinery, recyclable steel deck roof in a light color to prevent overheating.

Sustainable supply :

Biosourced insulation (wood fibres) implemented on the roof.

Marmoléum in the duplex rooms.

Wood pellets from a local pelleting unit (< 40 km )

Recycling :

• Awareness of waste sorting throughout the construction site.
• Organization of a collective cleaning and waste sorting operation involving all companies mid-site.
• On-site recycling of topsoil and stones from the demolition of the existing building

Indoor Air quality

Natural ventilation in addition to VMC in all rooms.

Floor coverings (tiles, marmoleum, wooden parquet) and PVC-free exterior joinery.

All the paints and stains used are classified A+, to limit VOCs

Comfort

Temperature level :

All housing including T1 are through with three orientations.

Humidity control :

VMC hygroB

Opening frames in all bathrooms and toilets

Tilt-and-turn windows in all bedrooms and living rooms.

Acoustic comfort :

Wood / concrete structure to adjust the acoustic comfort between dwellings

Visual comfort :

Design to favor the opening of all the living rooms onto the garden, with the trees preserved in the foreground.

Installation of micro-perforated store-screen type protection on living areas.

Quality of life and services

Housing project integrating a common garden for all the inhabitants of the condominium. Only vegetable strips are allocated to each dwelling.

Les Petits Landings have a guest bedroom shared with a bathroom for the reception of relatives. Disabled access and separate entrance.

The service landings are common spaces that can be appropriated by the inhabitants.