Bois Debout

Last modified by the author on 16/04/2021 - 17:49
  • Building Type : Collective housing < 50m
  • Construction Year : 2015
  • Delivery year : 2016
  • Address 1 - street : 34 rue Girard 93100 MONTREUIL, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 1 323 m2
  • Construction/refurbishment cost : 1 990 000 €
  • Number of Dwelling : 17 Dwelling
  • Cost/m2 : 1504.16 €/m2

Certifications :

  • Primary energy need
    49 kWhep/
    (Calculation method : RT 2012 )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

17 social housing + business premises in Montreuil sous bois (93). 940m² of living space. Wood-frame building on 6 levels full dry system (screeds and elevator shaft in CLT). Certification passiv haus level and Paris Climate Plan level without ENR. Owner: Grand Paris Habitat for Osica SNI. Architects: Stéphane Cochet + Bruno Garnier.

Sustainable development approach of the project owner

First goal: building a certified passiv haus building in addition to the H&E Cerqual certification. Proposal project management of all wood framing on 6 levels. Desire to control the loads of energy consumption and maintenance maintenance (P1 costs / P2 / P3)

Architectural description

Building installation on two former plots in dense urban center. architectural composition within the old parcel tracing around a two-part composition. typical architectural Writing suburb of architecture. aligned front, penthouse, pass box, cage lit staircase naturally. through housing off T1, North / South orientation. Work on summer comfort, the fight against heat islands (cool roof roof). No ENR, no radiator. reduced technical equipment (boiler of 24kW for all dwellings, a comfort ventilation to recovery centralized heat, static heat recovery units on waste water in each unit). Work at the plot level on biodiversity, shared garden and edible garden.

Building users opinion

energy and sociological monitoring of the building and its uses for 3 years as part of the agreement with ADEME IDF

If you had to do it again?

We show through this project it is possible to build an all wooden building on 6 levels certified passive to an equivalent price than building a concrete level RT2012 construction. Cost control P1 / P2 / P3 with very little equipment: a 24kW condensing boiler for the EC and the SAT 17 housing and a comfort ventilation to recovery centralized heat.

See more details about this project


Contracting method

Macro packages

Type of market

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Energy consumption

  • 49,00 kWhep/
  • 75,00 kWhep/
  • RT 2012

    12% Heating / Hot Water 23% / 6% Lighting / 17% following RT Auxiliary

Real final energy consumption

    63,00 kWhef/

Envelope performance

  • 0,28 W.m-2.K-1
  • Bbio gain of 22 70%

  • 0,57
  • n50

  • 0,30
  • No home automation installed apart in the building energy monitoring in place (instrumentation) as part of the ADEME convention for the measurement campaign and monitoring of 3 years on building on 5 RT positions.

More information

103kWh.ep / m².yr following PHPP


    • Condensing gas boiler
    • Condensing gas boiler
    • No cooling system
    • Double flow heat exchanger
    • No renewable energy systems
  • centralized 24kW boiler for EC production and Hot water of 17 apartments and a comfort ventilation to centralized heat recovery. One loop of hot water. individualized cylinder on hydraulic exchanger.

    récupération de chaleur statique sur eau usée, prises commandées, arrivée ECS sur machine à laver

Urban environment

  • 350,00 m2
  • 74,00 %
  • 60,00
  • urban city center, inner suburbs of Paris, site forced narrow street joint, demolition of two existing buildings including town house R + 1 and hangar. Built biodiversity vegetated northern facade with climbing (hydrangea) valley planted with fruit shrubs (cassisiers, currants, strawberries), fruit trees (pear), vegetable patch. Retrieving EP for watering and maintenance. Fight against the islets of heat roofing membrane with high solar reflectance of power (albedo 0.8) + evapotranspiration of vegetated northern facade.




    [email protected]

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    _ cool roofing roof waterproofing membrane

    under technical opinion

Construction and exploitation costs

  • 242 325
  • 3 160 276
  • 250 804

Energy bill

  • 6 800,00

Indoor Air quality



    20% glass area on SHAB m², through housing / A + VOC materials / triple glazing no cold wall / no cold air coming into carpentry (VMC double flow) / manual occultations openwork for summer comfort

    20°C winter comfort, overheat >25°C < 3,4°C according to PHPP

    Cerqual Qualitel H&E label

GHG emissions

  • 895,00 KgCO2/m2/an
  • like carbon balance sheets from the FDES materials

  • 12,00 KgCO2 /m2
  • 50,00 année(s)
  • 906,00 KgCO2 /m2
  • 315kg eqCO2/yr

Life Cycle Analysis


    350m3 of wood used, building organically sourced label

Reasons for participating in the competition(s)

 Wood-frame building on 6 levels full dry system (screeds and elevator shaft in CLT), Passiv Haus certification, bâtiment label bio-sourcé niveau 3, lauréat appel à projet ADEME IDF Bepos/Bepas 2013, lauréat du OffDD2015. Travail sur biodiversité batie et résilience urbaine. Construction "Low Tech" sans ENR. Approche en coût global P1/P2/P3 maîtrise des consommations énergétiques et des charges en entretien maintenance sur DVT de 30ans.

level 3 bio-based labelled building, chosen by ADEME for a call for proposals (BEPOS/BEPAS 2013 project), OffDD2015 award winner . Work on biodiversity and urban resilience. Low Tech construction without renewables. Global cost approach P1 / P2 / P3, controlled energy consumption and maintenance costs over 30 years.

Building candidate in the category

Energie & Climats Tempérés

Energie & Climats Tempérés

Coup de Cœur des Internautes

Coup de Cœur des Internautes

Green Solutions Awards 2017 - Bâtiments

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Author of the page

Stéphane Cochet

architecte indépendant

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