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Sign upNovember 30, 2021
Pullman Dakar Teranga Hotel
Dakar
In Dakar’s business district, the Pullman Dakar Teranga hotel faced persistent overheating across its 1,500 m. of terraces, contributing to excessive energy use for cooling. To address this challenge, the hotel implemented the CoolRoof solution, completing the installation in just 15 days at the end of 2021.
The results were striking: in 2022, energy consumption fell by 13% compared to 2019 when accounting for Unified Degree Days (UDD)1 and by 10% without it. Adjusting for the hotel’s occupancy rate, electricity use decreased by 36% during the same period. This reflective roofing technology not only lowered cooling demands but also demonstrated the potential of such solutions to mitigate urban heat in regions increasingly affected by rising temperatures and heat waves.
Dakar, with a population exceeding 1 million, experiences average temperatures ranging from 25 to 32°C year-round.2 These persistently high temperatures contribute to health issues such as hypertension, diabetes, and dehydration. Globally, access to air conditioning remains limited in developing regions, where affordability and unreliable electricity infrastructure create barriers.
Urban areas, such as Dakar, face the additional challenge of the urban heat island effect, where cities are significantly warmer than surrounding rural regions. This occurs because urban surfaces, such as roofs and pavements, absorb and retain large amounts of sunlight. These surfaces cover about 60% of urban spaces and absorb over 80% of the sunlight they receive, further intensifying the heat.3 Installing cool roofs with solar reflectance can reduce heat absorption and keep homes cooler. Conventional roofs can reach temperatures of 65°C or more on a sunny summer afternoon, while reflective roofs can stay over 28°C cooler under the same conditions.4
A white thermo-reflective coating that reflects 90% of the sun's heat, creating a complete thermal shield. It can be applied to various substrates, such as bituminous bilayer, steel, roof tiles, and asbestos. Additionally, it helps reduce the urban heat island effect from black roofs in summer, benefiting surrounding neighbourhoods.
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