Contractor

Name : SERL

Contact : LAVISSE Pierre - p.lavisse[a]serl.fr

 https://groupe-serl.fr/

Construction Manager

Name : Meîosis architecte mandataire

Contact : Fabienne Boyer - fabienne.boyer[a]meiosis.archi

Stakeholders

Function : Construction Manager

STUDIO SHIBUMI

Matthieu Cambuzat - matthieu[a]studio-shibumi.fr

 https://studio-shibumi.fr/


Site supervision

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Function : Thermal consultancy agency

EPCO ENERGIES

Romain Fevre - romain.fevre[a]epco-energies.fr - 04 78 47 25 44

 https://epco-energies.fr/


design and site monitoring of fluids/thermal/qeb cp dismantling

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Function : Structures calculist

DPI STRUCTURE

Simon PIERRON DPI - s.pierron[a]dpistructure.com> - 04 78 53 00 84

 https://www.dpistructure.com/


design and construction site wooden structure / 2D modules cp dismantling

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Function : Others

BOBI REEMPLOI

Anaïs Lecerf - anais.lecerf[a]bobi-reemploi.fr

 https://www.bobi-reemploi.fr/


supply and inventory of reused materials

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Function : Other consultancy agency

DENIZOU

NARDY Stephane - stephane.nardy[a]denizou.fr - 04 78 84 44 71

 https://www.denizou.fr/


construction economist / establishment of markets with specificities related to reuse

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Function : Company

VAGANAY

Patrice VAGANAY - contact.vaganay[a]gmail.com - 04 78 46 04 99

 https://vaganaysas.fr/


Holder of the Clos-Couvert macro lot / wood frame work (interior-exterior) and reuse cladding

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Function : Company

JF2E

Fabien ROGGIA - fabien.roggia[a]jf2e.fr - 04 69 00 16 09

 https://www.jf2e.fr/


Holder of the electricity / work package taking into account dismantling

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Function : Company

EGS

contact[a]egsclim.fr

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Function : Others

ALPES CONTROLES

Aurélien BOUCHEROT

 https://www.alpes-controles.fr/


Process support related to reuse / validation of products resulting from reuse

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Function : Others

MADE IN PAST

Maxime CORNUT - contactmadeinpast[a]gmail.com

 https://www.madeinpast.fr/


stripping and transport-storage of reuse blinds and shutters

Contracting method

Other methods

Type of market

Other

Other type of market

PUBLIC CONTRACT LAW MOP / BASIC MISSION WITHOUT EXE

Allocation of works contracts

Macro packages

Energy consumption

• Primary energy need : 87,00 kWhep/m².an

Calculation method : RT 2012

Breakdown for energy consumption :

• Heating: 54
• DHW: 4.4
• Lighting: 22
• Auxiliaries: 10

Real final energy consumption

Final Energy : 33,75 kWhef/m².an

Envelope performance

• Envelope U-Value : 0,30 W.m^-2.K^-1
More information :

Walls, floor, and roof in boxes insulated with wood wool.

• Building Compactness Coefficient : 0,50

Indicator : I4

• Air Tightness Value : 0,48

More information

• The calculations are carried out without PV.
• We will follow the usage. A user guide is in progress.

Systems

Heating system :
• Electric radiator
Hot water system :
• Other hot water system
Cooling system :
• No cooling system
Ventilation system :
• Free-cooling
• Double flow heat exchanger
Renewable systems :
• Solar photovoltaic
• Renewable energy production : 15,00 %

Biodiversity approach

Mitigation actions on soil and biodiversity :

The building was designed to be completely removable and then reusable. The foundations were therefore designed to fit into the existing ground and are aerial: they receive the 2D elements built off-site and placed using a crane. The single-storey wooden structure building is light, and its impact will ultimately be zero when it is no longer used and dismantled. Materials are identified for future reuse.

Risks

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

Risks measures put in place :

• Biosourced overinsulation with thermal phase shift;
• Natural ventilation hatch;
• Fans;
• Adjustable sun breakers;
• Light tints for albedo limitation;
• Rainwater recovery;
• Raising the building by 30 cm;
• User manual for getting started with resilient functions.

Urban environment

The building is strategically positioned on the territory, wanting to be the first link between the strengthened city and the historic district of La Saulaie (working-class district).

It is therefore located on the modal exchange hub, facing the wasteland which constitutes the land of the future joint development zone.

On the 650 m² plot, the weeds have been preserved and enhanced by a through opening in the building. The latter encourages connections between indoor and outdoor activities.

• Land plot area : 667,00 m²
• Built-up area : 38,00 %
• Green space : 152,00

Construction and exploitation costs

• Renewable energy systems cost : 12 675,00 €
• Cost of studies : 109 740 €
• Total cost of the building : 789 879 €
Additional information on costs :

Reuse facades:
The amount of the Bobbi Réemploi contract is €28,240 excluding tax, including: research, storage, reconditioning and delivery.
There is installation by the company at €92.4/m2 excluding VAT, i.e. +€21,991 for: support for young work sites, adaptation and repairs, installation.
There is then €1,886 linked to the intervention of the journeymen builders for the young building sites.

Building reuse:
The additional building cost is estimated at 20/25% of the works price. This estimate does not include the overall cost study on dismantling/reassembly which in fact makes the operation profitable over time.
Specific elements not related to dismantling or reuse are added: land preparation including pollution €18,505 excluding tax / furniture and exposure €19,536 excluding tax / raft for poor soil 35 10

Circular economy strategy

Phase in which reuse has been integrated : Programming

Type of circular economy strategy implemented :
• Maximization of quantities on targeted products
• Targeting of areas
• Maximization of the carbon gain
• Maximization of the mass of waste avoided
Type of circular economy strategy implemented :

On the building itself (removable-remountable) / on the facade (100% of the cladding)

Quantified targets for reuse? :

The objective was to provide 220 m² of wooden blinds and shutters to cover the facade.
The second objective is to be able to reuse the building on other sites.

Integration of reuse into the written contract documents : Creation of a specific circular economy batch

Validation protocol for reused materials : Yes

Validation protocol for reused materials :

The material supplier (Bobi Réemploi) produced material tracking sheets, including information on the origin of the deposits, their age and photos. These sheets were then validated by the control office (Alpes Contrôle). At the same time, the architect had undertaken to reuse the deposits regardless of their size.

Deposit validation form : Yes

Reuse : same function or different function

Batches concerned by reuse :
• Structural framework
• Roofing
• Facades
• Outdoor joineries
• Floorings
• Isulation
• Suspended ceilings
• Raised floors
• Electricity
• Heating ventilation air conditioning
• others...

For each batch : Reused Materials / Products / Equipments :

Facade :

• Wooden shutters: Supply, stripping and storage: 173.5 m²
• Solid wooden shutters: Supply, stripping and storage: 40.9 m²
• That is 269 units


These materials come from five different deposits, located in the Auvergne-Rhône-Alpes region:

1. 61 units - collective housing - Lyon (69)
2. 107 units - individual housing - Saint-Etienne and outskirts (42)
3. 36 units - individual housing - Saint-Etienne and outskirts (42)
4. 18 units - individual housing - Morestel (38)
5. 37 units - Chambéry Museum - Chambéry (73)

 

For the closed-covered, fluids, and finishes:

• 100% of the structure which is made of 2D modules for future reuse, including floor and roof, with insulation and interior linings including acoustics, 100% joinery and solar protection, 100% electricity, 100% HVAC, 100% floor

Reused materials rate :

Preamble

The facade reuse project includes several different inputs that had to be coordinated, beyond the classic-current elements (markets, control office, etc.):

1. The architectural concept, with the architect's desire to propose a symbolic and visible element for this Project House which also brings together the Inclusive Policy Department of the City of Oullins (PIVO), and which had to make the link between the historical working-class district, and the reinforced city => choice of an element of ordinary architecture Shutter and Persienne which would be laid out on all the facades.
2. The choice to leave the sourcing free with regard to the dimensions of the elements, the architect agreeing to adapt the final layout according to the dimensions found.
3. The unknown as to the quantities possibly sourced, in a short time since young construction sites were planned for July 2022 and sourcing began in March => a fixed base in the markets + in BPU, as well as a very strong coordination master of work architect Bobi control office to monitor financial elements and commitment to advancement.
4. The management of the temporality of the project (both for the dismantling aspect and the reuse of facades). The study and construction deadline objectives were very, very tight.


Reuse facades

The market was organized as follows: a batch of reusable supplies was created especially for facade materials and the installation was integrated into the carpenter's batch.

Regarding the specific lot, it was carried out independently of the global call for tenders, according to the legal thresholds in force.

The carpenter's lot had two positions in BPU (Unit Price Coupons) and not DPGF: adaptation and installation of reused products supplied elsewhere / installation and supply of solid panels. These two positions were necessary to manage the quantities according to the temporalities of the sourcing which was carried out partly after the start of the construction site.

The supply package included the sourcing of materials, their restoration and the consequent logistics. For the wooden shutters, Bobi Réemploi organized the sourcing and delivery until reconditioning; its subcontractor Made in Past ensured recovery after stripping and deliveries to the site of the young site and the final site. The shutters were therefore delivered stripped and without locksmithing on site. A specific numbering was created in order to identify each shutter at each stage of the reconditioning: the architect had to carry out a patient layout of the facade from the deposits, spiced up by variations in hue.

Sourcing began in March 2022, the general construction site began in May, and the shutters were recovered until July 2022. The layout of the facade was carried out in parallel with the research. A young worksite to integrate the inhabitants of the district was organized in the summer of 2022 in order to paint part of the shutters. They were then delivered to be placed on the assembled wooden modules.

Building reuse

The market includes a dismantling - reassembling component. The desire is to minimize the impact of this house of the project, destined to be moved at least once within the framework of the ZAC. Also, the intention is to reuse the building off-site once the urban project is completed.

The 2d structural modules present simple connections between panels. The false ceiling and the wall linings are all in OSB in order to participate in the dismantling. The technical lots follow with ageneralized octopus system and junction boxes between each panel for disconnection of the modules, at the HVAC level, flexible sleeves in line with each panel also for easy dismantling.

In this context, the companies were also in charge of the execution studies and must provide a dismantling-reassembly notice.

Feedback

The process went well on the whole despite several difficulties:

1. Difficulties related to temporality.
2. Difficulties linked to the concerns of identifying the shutters: the latter had a code specific to them, but the reconditioning stages (change of storage locations, stripping involving an alternation between wet and dry phases) caused the dimensions of the deposits to vary the order of 1 to 2 cm over a width of 50 cm. They also involved losing the identifications between 2 steps. These variations were inevitable but complicated the identification of the shutters in order to replace them in the layout of the facade: they were measured at least 3 times each over the entire process. Despite good organization of the deposits on the site, the final installation of the shutters took turns of a puzzle for the carpenter (who had fun with it!).

Logistics

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

Storage of materials from external supply :
• No storage on site, but financial contribution for storage by the material supplier on his site

Insurance

Consultation of the technical controller : Yes

Specific mission given to the technical controller :

No, the mission was entrusted to the material supplier.

Insurance broker on the project : No

Insurer : SMABTP

Consultation insurer : Yes

Discussion with the insurer :

Insurance during the works phase was obtained through a consultation. SMABTP was selected (DO and TRC) for the site without specific measures on the issue of reuse.
RC insurance has been taken out for the building and another for the model inside. These insurances are concluded with our usual insurance market

Additional premium :

Non

Environmental assessment

Impacts avoided : water, waste, CO2 :

Result of the calculation of impacts avoided with the Booster tool:

	CO2 avoided (kg)	Water consumption avoided (m3)	Waste avoided (kg)
TOTAL	2123,262112	608.6888483	1869,131764

The reuse operation saved the equivalent of 16,986 kilometers traveled by a small car, i.e. 19 Paris-Nice journeys 4058 rectangular bathtubs filled with water 4 years of household waste from a Frenchman

More details on the avoided impacts :

Results of the impact calculation carried out by Bobi Réemploi

Cladding:

• Waste avoided: 3.75 tonnes
• Global warming impact: 9052.2 kg.eq.CO2
• Use of fresh water avoided: 164 m3
• Biogenic carbon content of the product (stockC): 1200 kgC

 

BUILDING NOT YET CALCULATED / in progress

Beyond the common impacts avoided linked to wood construction with wood from the Alps, the dismantling/reassembly corresponds to estimating a future "new" construction for which the interior partitions and the adaptation to the ground will be the two main impacts.

If we estimate (in short) from the financial amounts, the dismantling/reassembly cost should be around 25% of the base price of the building, ie 75% less impact.

Economic assessment

• Total cost of reuse : 28 420 €

Reuse quantified in the companies' offers? : Yes

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

The contracting authority bought the materials from Bobi Réemploi with an order form.
The materials for the dismantling system come from conventional channels.

• Fees of the contracting authority support : 800 €

More details on the economic balance :

Reuse facades

The amount of the Bobbi Réemploi contract is €28,240 excluding tax, including: research, storage, reconditioning and delivery.

There is installation by the company at €92.4/m2 excluding VAT, i.e. +€21,991 for: support for young work sites, adaptation and repairs, installation.

There is then €1,886 linked to the intervention of the fellow builders for the young building sites.

Building reuse

The additional building cost is estimated at 20/25% of the works price. This estimate does not include the overall cost study on dismantling/reassembly which in fact makes the operation profitable over time.

Specific elements not related to dismantling or reuse are added: land preparation including pollution €18,505 excluding tax / furniture and exhibition €19,536 excluding tax / raft for poor soil €35,104 excluding tax

New business model and financial balance :

The price per m² of reuse cladding was around €140 excl. VAT/m² for supply, for a current price for an equivalent product (blind) of approximately €480 excl. VAT.

As part of a "classic" project, there would have been no interest in implementing this type of cladding element.

Communication

Communication on the process : Yes

If so, please specify :

• Site visit with members of the Ville et Aménagement durable association on January 26, 2023 (forty registered).
• Site signs explaining the process.

Project visit : Yes

Social economy

Social economy and professional integration :

Bobi réemploi is a SSE company with 4 employees during the search for materials and the logistics of reuse.

Circular design

Responsible consumption :

The SERL has significant experience from the other operations it monitors on “project house” objects. This equipment is expensive, ephemeral, difficult to maintain and not always unifying. At the same time, the need for spaces for animation, and communication, for education on large-scale urban projects are increasingly essential to activate wastelands and spaces which, on the scale of the inhabitants, are slow to change. Temporary occupations of these wastelands are almost systematic now.

This observation prompted the SERL to bring together the different functions of a project house in an activation building of the SNCF wasteland. The integration of PIVO as a facilitator and local relay between the existing and the project has made it possible to establish a link with the territory.

The first building to come out of the wasteland, the SERL has chosen to highlight a responsible and exemplary building both in the materials that constitute it (biosourced and local), in its operation (passive), in its use (shared) and rich in sense with the reuse of materials on the facade. Finally, disassembly/reassembly is also part of this exemplary approach to respond to the short lifespan of the equipment in place.

Functionality economy :

see above, in particular with the integration of the PIVO service.

Industrial and territorial economy :

In addition to the reception of the political service of the city of oullins, it is a shared operation that is allowed by this building. The urban project is accessible via a building which houses municipal services, a sign of the municipality's involvement in the renewal of the district. 

Animations and activities with colleges, schools, the social center, are planned to integrate the urban project into educational courses.

Links with local professionals are also being studied to support the transformation of certain companies within the joint devlopment zone.

Eco-design :

The eco-design component includes:

• Bioclimatic work: solar gains, wind, distance from road noise for offices, preservation and enhancement of existing plant spaces (including high-stem trees), recovery of rainwater for educational gardens, bike racks and dedicated personal parking
• Dismantling/reassembly
• Work on summer comfort: with natural ventilation through specific openings + air blower + wood wool for phase shift + BSO
• Work on winter comfort: overinsulation + DF heat recovery
• Acoustic work

Sustainable supply :

• Use of wood from the Alps;
• Water recovery;
• Passive summer comfort.

Recycling :

• The very framework of the disassembly/reassembly approach limits waste.
• At the level of the exterior and interior layouts, the latter are optimized to limit scraps and cuts (particularly OSB). Regarding the shutters, we have installed everything.

Additional information (PDF documents)

Websites

 https://www.bobi-reemploi.fr/
 https://www.ville-amenagement-durable.org/SERL-chantiers-de-reemploi-logistique-urbaine-et-renaturation
 https://www.ville-amenagement-durable.org/Maison-du-projet-du-quartier-de-La-Saulaie

Indoor Air quality

• No measurements taken.
• Precautions are taken on the OSB category + ventilation rates above the standard (25m3/h per person) + large volumes.
• Regulation on CO2 sensor for conference area

Comfort

Temperature level :

• Work on summer and winter thermal comfort, with the possibility in terms of ventilation of switching from DF heat recovery in winter to 100% natural ventilation.
• Temperatures cf. Givoni diagram with simulations

Acoustic comfort :

• Work with perforated OSB, and work on mechanical ventilation.

Visual comfort :

• FLJ simulations + work with adjustable BSOs for level management.
• Management also of artificial lighting with level variations.

Ergonomic design :

• L+M work on reception elements both in terms of signage and furniture

Quality of life and services

• User guide in progress.
• In the meantime, an on-site explanation of the elements related to summer comfort has been carried out by EPCO.

Carbon sink

• Floor, walls, roof: wooden boxes with 100% wood wool insulation
• Walls, roof: interior finishes 100% wood panels (no placo and aluminum rail)

Initiatives promoting low-carbon mobility

• Bicycle racks for visitors;
• Bike room for staff;
• Positioning to the right of the Oullins multimodal exchange hub.