• Building Type : Other building
  • Construction Year : 2021
  • Delivery year : 2022
  • Address 1 - street : Avenue Félix Éboué x Route des Brasseries BP 737 DAKAR, Other countries
  • Climate zone : [BSh] Subtropical Dry Semiarid (Steppe)

  • Net Floor Area : 9 m2
  • Construction/refurbishment cost : 5 574 €
  • Number of none : 1 none
  • Cost/m2 : 619.33 €/m2
  • Primary energy need
    (Calculation method : )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

This project won a  mention for the Hot Climates Prize at the national level of  the Green Solutions Awards 2022-2023.

We have renovated a guard house located at the entrance of Eiffage Sénégal headquarters.

The project aimed at :  

  • Providing thermal comfort for users (guardians) 
  • Demonstrate that locally produced baked clay can impact the thermal confort of buildings built in concrete. Especially since the construction market is booming in Senegal, but buildings are essentially made of concrete. Yet, we know that concrete buildings face overheating therefore leading to extra use of air conditioning, meaning extra greenhouse gas emissions.
  • Displaying our first pilot of thermal renovation. That is why we decided to locate the project by the entrance of our headquarters, so that anyone could see it with their own eyes, especially our commercial stakeholders (clients, backers, suppliers...) and decision-makers passing by our headquarters for regular meetings.
  • Promoting clay as a "modern" product, while it is commonly perceived in Senegal as a material for the "poor". As we know that it carries a lot of potential in a climate context we need to promote its modernity to lead to its acceptance by users. Therefore it was strategic to set the project by our headquarters.

Technically the project consisted of 3 phases : 

We decided to use baked clay because of its ability to slow down the penetration of heat inside a building. Working as a protective layer.

  1. We first made a thermal study of the guard house made of concrete and sheet metal, before renovations. It has helped us identify how we should renovate the guard house to enhance thermal comfort
  2. We then made architectural plans of the renovation, following the recommandations made by the thermal study
  3. After we decided on the architectural designs based on the layouts, we started the renovation works, focusing mainly on adding a baked clay layer outside and inside the existing walls, plus adding a baked clay canopy on the roof

Photo credit

Ibrahim Niang


Construction Manager

    EIC (Entreprise d'Ingénierie et de Construction)

    Moussa Dia - CEO - Dakar - [email protected]


    Thermal consultancy agency


    Ibrahim Niang - Consultant - [email protected]

    Study of thermal efficiency of the building before renovation, providing thermal recommendations to guide renovation works


    Architect - CAWD

    Adji Woury - Architect & CEO - [email protected]


    Made architecture plan of the renovations, according to thermal recommandations made by EMASOL's thermal study

Contracting method

Other methods

Type of market

Design and implementation

Other type of market


Allocation of works contracts

Separate batches

If you had to do it again?

For the stakeholder in charge of the rehabilitation works, one of the first issues he had to solve was that there was no concrete armoring existing in the original building, and they've discovered it once the rehabilitation works had already started, the moment the previous aluminium roof was taken

while it was necessary so that the baked clay canopy could sit on it. 

Besides, the collar surrounding the arch was an issue. Cutter angles had to be set while the canopy is not a perfect circular arc. 

Building users opinion

From discussions with 2 guards who have worked within the guard house before and after renovations, they have confirmed that it is cooler inside, and that they are using less ventilation.

Energy consumption

    Before renovation, the energy consumption was made of a fan and a light build used at night

    After renovations, the energy consumption was also made of a fan and a light bulb at night. However, the fan was much less used thanks to the thermal renovations, and likely dropped. 

    Due to the small surface area of the building, it is hard to isolate the sole consumption of the house guard, and therefore know the exact consumption. However, we carried out a study of the temperature outside and inside the building before and after renovations.

    What came out was that the renovations with baked clay have helped us enhance the room temperature of 2 degrees, and through different discussions with guards they've confirmed that they feel cooler inside the room, and use less fan.

Envelope performance

  • 0,10 W.m-2.K-1
  • We don't have the information

  •  0

Real final energy consumption

    0,10 kWhfe/m2.year


    • No heating system
    • No domestic hot water system
    • No cooling system
    • Natural ventilation
    • Free-cooling
    • No renewable energy systems

Urban environment

    The building is located near a small yawn, and nearby a street where bus stops for passengers, and next to a small parking

  • 9,68 m2
  • 98,00 %


Construction and exploitation costs

  • 3 648
  • 5 574

Circular economy strategy


    • Targeting a few diversified products for testing
    • Targeting of areas
    • Maximization of the mass of waste avoided

    From the programming phase, the aim was to renovate the guard house while preserving a maximum of the material already in place. That's why the foundations, and the four walls made of concrete have not been altered by the renovation

    About 80% of the original house remained after construction

    Integration of the approach in the general clauses



Reuse : same function or different function

    • Structural works
    • Structural framework
    • Facades
    • Electricity

    Facades, structural works, Electricity and the structural framework of the house have remained, or been "reused" after the renovation phase. Thanks to the thermal study conducted during the first stages of the project, we managed not to modify most of the initial guard house

    About 80% of the original building material has remained after renovations




    • On an external platform, without specific reconditioning operations
    • On site, on a dedicated area not covered






Environmental assessment

    We have not made an calculation of the impacts avoided. 

    To be completely honest, we don't believe that the project in itself managed to prevent CO2 emissions because the building did not use air-conditioner, and therefore, before renovations, the amount of electricity used for ventilation was rather smal and it still is. However it was not the primary focus of the project, even if it is part of our low carbon strategy.

    Indeed, we still believe that it is an interesting project from a low carbon perspective. Why ? Because we managed to prove that using baked clay reduced the room temperature of a building made of concrete.

    Therefore we validated the assumption that it is of high potential to renovate with baked clay the existing senegalese housing stock made of concrete and using air-conditioner.  Especially in a context of climate change linked with a pressing need to reduce greenhouse gas emissions.

    As we know that buildings built with concrete lead to high consumption of air-conditioner, and that air conditioner consume lots of greenhouse gas emissions, our project aimed at impacting the minds of programmers, and all in all aimed at paving the way for low carbon solutions adapted to senegalese economic and housing stock context.

    Everyone suffer from heat inside concrete buildings, and air conditioner is very expensive. So we are hoping to open up new ways of thinking. 

    Senegal has taken commitments regarding climate change to reduce its greenhous gas emissions (GHG) by 7 to 30% before 2030, according to the paris agreement. 

    However, oil & gas is about to start being operated. Therefore we need to find other potential gist of GHG reductions within the country. Air-conditioner-related GHG could be one of them, by carrying out well-thought renovations. 

Economic assessment

  • N.C.

    • Others

    The reuse process happened on site as we didn't alterate the existing walls of the original building.

  • From an economic point of view, we need to lead potential future clients to think long term, and see the extra cost of renovation as an investment for future air-conditionner-related savings. And savings from a climate-related point of view. 




    We have written the project into our first notebook on "low carbone innovation by Eiffage Senegal". 

    Besides, we have interviewed the CEO of the company which conducted the renovation works, and will add it into our next video about climate change, displayed on our social networks. 

    Also, we wrote a note about our low carbon strategy and the variety of low carbon projects implemented by Eiffage Senegal. This note is added in our call to tenders so that clients and lenders can now about our climate strategy.


Circular design

    The core of the project takes responsible consumption at heart. That is why we have decided to focused on baked clay, locally produced in Senegal by a SME. 

    Besides, we have decided from the beginning to keep as much material as possible. That is why we decided to focus on renovation rather that demolition/construction. 

    Also, our main goal is to impact the Senegalese building market by proving that it is possible to renovate building to enhance their energy efficiency in order to prevent greenhouse gas emissions linked with air conditioning consumption

    The baked clay used is a geo-material, locally produced.

    The recycling aspect lies at the heart of the project, as we kept as much material as posssible from the original building block. 

Additional information (PDF documents)


    The project enabled to reduce the temperature level by 2 degrees (see the study)

    Baked clay help to enhance humidy control

    Clay material is known for enhancing the well-being of users 

Quality of life and services

The project also aimed at enhancing the quality of life of guards, as the point is to get a cooler room temperature so that they could handle better the high temperature that can be experienced in Senegal. 

Reasons for participating in the competition(s)

Our building have a lot of assets regarding our contest category, from its conception to its realisation.

Indeed, it is a renovation project focused on promoting green renovation by experimenting first on a small building. 

It is green renovation in its scope by aiming at reducing air conditionner-related greenhouse gas emissions. But it is also green renovation because of the materials used : baked clay, which is a geomaterial.


Building candidate in the category

Users’ Choice

Users’ Choice

Green Solutions Awards 2022-2023
 adaptation bioclimatism building adaptability building products and materials eco-renovation ecological transition ecomaterials energy efficiency integration into the site low energy building renovation resilient city sobriety Green Solutions Awards Green Solutions Awards 2022 2023

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Author of the page

Taman Mhoumadi

Low carbon Innovation Manager

Other case studies



Green Solutions Awards 2022-2023