E.Leclerc Center of Quimper

Last modified by the author on 08/06/2017 - 16:31


  • Building Type : Supermarket - Hypermarket
  • Construction Year : 1988
  • Delivery year : 2015
  • Address 1 - street : 29000 QUIMPER, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 6 097 m2
  • Construction/refurbishment cost : 120 000 €
  • Number of Visitor : 50 Visitor
  • Cost/m2 : 19.68 €/m2

Proposed by :

  • Primary energy need
    599 kWhep/m2.an
    (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 E.Leclerc Center of Quimper is a classic shopping center, built in 1988.
The E.Leclerc Center in Quimper chose the Cool Roof reflective thermal paint to paint its roof in white to limit the heat of the building.

A white roof "Cool Roof" returns the heat of the sun, limiting the heat on the roof of the building, and therefore inside the building. It is a simple and effective solution to improve the comfort of non-air-conditioned buildings. to limit air conditioning expenses for air-conditioned buildings

Case study :

E. Leclerc of Quimper; 6097m2; 120k € of paint (supplied / asked)

10 days of construction on the roof (without any hindrance for the store)

Result = 20k € saving of electricity consumption / year + prolongation lifetime of the roof.

Internal rate of return measured by 28%

Sustainable development approach of the project owner

For more than ten years, the SAS Kervilly has a permanent will to reduce its carbon footprint and implement a HQE policy with its services, its collaborators with its commercial and associative partners and to "test" in situ experiments improving our energy consumption. In three years, consumption has decreased by more than 45% over the period from 1250Kva to 750 Kva to date. It is one of the first stores to have changed its refrigerants to best fit future bonds, one of the first to change its lighting methods for a transition to full LEDs.

It is especially the only food surface of this size (6097m2) to realize a "cool roof", the biggest of Europe, which ensures a very high energy efficiency (see article http://www.construction21.org/ France / articles / en / rooftop-cost-to-save-lenergie.html).We want and need to continue in these steps and exchange to improve our approach HQE purpose of this application.

Architectural description

The building is a classic shopping center of 6097m2 built in 1988. The roof, not renovated since the construction, is sandwich panel steel tank / insulation / bilayer bitumen and suffering from microcracks. In 2015, the decision was made to try to apply a thermal reflective elastomer paint type "cool roof".

Building users opinion

The owner is delighted with the savings and media spinoffs.
Building users have a better sense of ambient air quality, especially in summer due to the non-start-up of cooling units.

If you had to do it again?

The center E.Leclerc has planned to paint an additional 1000m2.

See more details about this project



Construction Manager



    Corre SARL

    [email protected]

    Application of a white reflective thermal paint to return the heat and thus improve the thermal comfort of buildings or reduce air conditioning expenses.

Energy consumption

  • 599,00 kWhep/m2.an
  • 300,00 kWhep/m2.an
  • RT existant

  • 599,00 kWhep/m2.an

Real final energy consumption

    565,00 kWhef/m2.an

    565,00 kWhef/m2.an

    2 015

Envelope performance


    • Heat pump
    • Individual electric boiler
    • Reversible heat pump
    • Double flow heat exchanger
    • No renewable energy systems

Urban environment

    Commercial area of ​​Gourvilly Quimper


    Cool Roof France

    Cool Roof France

    [email protected]


    Second œuvre / Peinture, revêtements muraux

    Cool Roof offers an innovative ecological reflective thermal paint, which reflects the heat.
    Respectful of the environment, it is light, resistant and easily applied on all types of roofs.
    A white roof "Cool Roof" returns the heat of the sun, limiting the heat on the roof of the building, and therefore inside the building.
    The building manager can thus:
    - save up to 30% energy
    - plug the roof microcracks
    - all without having to modify the structure of its building

    Owners of large commercial, industrial or institutional buildings seek this kind of simple, affordable, direct energy efficiency solution, thus avoiding overloading the production of cold.

Construction and exploitation costs

  • 120 000

Energy bill

  • 272 000,00

Life Cycle Analysis


  • 119 000,00 kWhEP

Reasons for participating in the competition(s)

This building has the largest Cool Roof in France. The most innovative aspect of the renovation is the application of thermal reflective paint on the roof.

A white roof reflects about 85% of the sunlight that reaches it and heats up a few degrees more than the outside air temperature. On the other hand, a black roof can heat up to over 80 ° C.

It is therefore a simple and effective solution to improve comfort, limit air conditioning expenses.

The strong points of a cool roof:

  • · Reduce energy bills by reducing the need for air conditioning,
  • · Improve thermal comfort for spaces that are not air-conditioned,
  • · Improve the performance of roofing equipment (air conditioner, solar panels ...)
  • · D Decrease the temperature of the roof, which prolongs its life because it undergoes no more important changes of temperatures.

NB: The RTex, RT2012 and LEED certification include in their calculation the solar absorption of horizontal walls. Coolroofing is widely used in the USA but very little used in Europe.

Building candidate in the category

Energie & Climats Tempérés

Energie & Climats Tempérés

Coup de Cœur des Internautes

Coup de Cœur des Internautes

Prix des Etudiants

Prix des Etudiants

Green Solutions Awards 2018 - Bâtiments

Share :
Author of the page
Antoine Horellou


Other case studies



Green Solutions Awards 2018 - Bâtiments