Energy renovation in Sèvres Residence

6481 Last modified by the author on 11/05/2020 - 12:09

Heritage renovation

  • Building Type : Collective housing > 50m
  • Construction Year : 1962
  • Delivery year : 2019
  • Address 1 - street : 21-23 avenue de l'europe 92 310 SEVRES, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 2 806 m2
  • Construction/refurbishment cost : 850 000 €
  • Number of Dwelling : 103 Dwelling
  • Cost/m2 : 302.92 €/m2

Certifications :

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

The project concerns the rehabilitation of 2 buildings, of 102 dwellings in total, located Avenue de l'Europe in Sèvres.

It is an energy renovation project in the heart of the city of ceramics, which houses the workshops of the prestigious Manufacture Nationale de Sèvres and the National Museum of Ceramics, an area that is today the subject an ambitious development project.

An ambitious project that conflicts with the conventional architecture of social housing in the "Glorious Thirty" (1946-1975) sad and austere, demonstrating that it is possible to reconcile thermal performance, solution to asbestos problem, improvement of the living environment and innovation.

The goal of this renovation is to reduce the consumption of heating, domestic hot water, ventilation and auxiliaries to pass from the label F to C.

But that's not all, it is imperative to encapsulate asbestos present in the facade following a procedure consistent with the legislation in force on busy site (waste management, protection of companions etc ...).

The guiding ideas : Improve the energy performance of the residence while bringing color and relief. The construction site is still in the architectural environment of the city of Sèvres.

Technical constraints: Installation of 3 different types of cladding + classic thermal insulation on each facade. Regulatory constraint: presence of asbestos on lighters

The two buildings composing this co-ownership having different energetic performances, we will present here the data concerning the building 21, which is the most exemplary.

Sustainable development approach of the project owner

Decrease the heating consumption, hot water, ventilation and auxiliaries to pass the label of energy consumption from F to C. This renovation allowed in particular:

  • Exterior insulation made of expanded polystyrene graphite
  • Metal louvers in thermo-lacquered aluminum + cladding and framing of zinc berries
  • The replacement of the boiler room

Architectural description

The buildings are constructed of reinforced concrete, with slab system, posts / beams and concrete sails. Access to the buildings is via ramps and stairs from the street to the ground level. This level corresponds to the high level of the base (roof terraces) which forms the massive base of the two buildings. This base is about 2,40 m above the lowest point of the street. The height is variable depending on the position of the building. The entrances are located on the respective forecourt of the buildings. The base of the forecourt of building No. 21 contains businesses.

Building users opinion

Very satisfied with the improvements made

If you had to do it again?

We would do the same procedure again.

See more details about this project


Construction Manager




    Eric BALECH

    Building company specializing in refurbishment, ITE, Bardages.

    Thermal consultancy agency

    Wor Ingénierie

    contact (a)

    Thermal study


    FLORET-SCHEIDE Architectes

Contracting method

Other methods

Energy consumption

  • 95,40 kWhep/
  • 128,00 kWhep/
  • RT existant

    Bat 21 (there are two buildings, but we decided to focus more on building 21, more iconic)
    CH: 50.7 VS 255.8
    ECS: 31.8 Vs 39
    Wind: 4.3 VS 0
    Light: 6.3 VS 6.3
    Aux. : 1.7 VS 16.2

    Bat 23 =
    CH: 56.7 VS 232.5
    ECS: 31.8 VS 38.9
    Wind: 4.3 VS 0
    Ecl: 6.3 VS 6.3
    Aux. : 1.8 VS 15.1

Envelope performance

  • 0,97 W.m-2.K-1
  • U-bat of the envelope
    Bat 21 = 0.972 W.m-2.K-1
    Bat 23 = 1.149 W.m-2.K-1

    U-bat before work:
    Bat 21 = 3.202 W.m-2.K-1
    Bat 23 = 3.326 W.m-2.K-1

  • 1,00

More information

Consumption of primary energy
Bat 21 = 95.4
Bat 23 = 101.6

Conso of standard primary energy:
Bat 21 = 128
Bat 23 = 128.4

CEP before works:
Bat 21 = 255.8 kWEP m2 / year
Bat 23 = 232.5 kWEP m2 / year


    • Condensing gas boiler
    • Condensing gas boiler
    • Heat pump
    • No cooling system
    • humidity sensitive Air Handling Unit (hygro A
    • Heat pump

    Heating production is provided by two gas condensing boilers, with fixed hours programming and room control. The work allowed the insulation of the heating pipe.

Urban environment

  • 3 451,00 m2
  • The operation concerns the 2 buildings of the parcel located in dense urban environment along the avenue of Europe, main road crossing the commune of Sèvres. This co-ownership is part of a set of 4 buildings with similar architecture. They are located in height comparing with the avenue and on the southern flank of the valley which goes up towards the forest of Meudon. The area between Avenue de l'Europe, rue Pierre Midrin and rue Leon Cladel is characterized by the presence of large complexes, bars and constructions similar to those of the operation. Going up the hillside, the buildings become mainly pavillions, scattered between the trees and the dense green vegetation. The site of the operation is between Avenue de l'Europe, rue Pierre Midrin in the North and rue Léon Cladel in the South. The terrain of the operation has a significant difference in level between the northern limit and the southern limit. The difference in height is about 19 m. The buildings were built on a slab above street level at about 2.40 m high.


    Cladding TERREAL



    Finishing work / Partitions, insulation

    Product cladding terra cotta finish

    The difficulty lies mainly in the setting up of the various frames




    Finishing work / Partitions, insulation

    Product allowing us to cover the asbestos spoilers

    The difficulty lies mainly in the setting up of the various frames

Construction and exploitation costs

  • 850 000

GHG emissions

  • 19,00 KgCO2/m2/an
  • 69,00 KgCO2 /m2
  • GHG in years of use: 3.63 years

Reasons for participating in the competition(s)

?L'idée directrice de cette opération était d'améliorer la performance énergétique de la résidence tout en apportant relief et couleur dans l'environnement architectural de la ville de Sèvres.
Pour ce faire, SPEBI a du effectuer ce chantier de rénovation énergétique avec des équipes spécialistes de l' ITE d'une part et du bardage d’autre part.

Building candidate in the category

Energy & Temperate Climates

Energy & Temperate Climates

Users' Choice

Users' Choice

Green Solutions Awards 2019 - Buildings

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Author of the page
Eric Balech

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Green Solutions Awards 2019 - Buildings