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Cool Roof France

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'Time points' are awarded according to the adequacy of the solution with the type of innovations sought by Time for the Planet®. They correspond to the analysis of several factors :

  • impact potential: impact average score > 4 => 0,5 point / if > 4,15 => 1 point.
  • global consistency: all average score of the 6 selection criteria > 2,5 => 1 point.
  • the favourite: % of assessments judge the innovation as a top one to act on a global scale against greenhouse gases > 20% => 1 point
  • the targeting: validation of Time for the Planet<span class="brand">®</span> scope of action higher than 90% => 0,5 point + innovation level of maturity is enough => 0,5 point
  • social acceptability: semantic analysis score of comments > 0 => 0,5 point/ if > 3500 => 1 point
78 assessments

Pre-industrial or industrial stage

A passive and low-tech solution for the protection of buildings and cities against high temperatures due to climate change.

Lever of action
Sufficiency
Sector
Buildings
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Funding realized on
July 13, 2022
Company created on
July 17, 2015
Amount invested
€500,000

In a nutshell

By limiting the warming of buildings, Cool Roof is an alternative to air-conditioning systems, which are energy-consuming and polluting because of the use of HFC gases whose global warming potential (GWP at 100 years) is 2,800 times higher than that of CO2. Applied in France, the Cool Roof solution allows an average reduction of 25 kg CO2 per m2 over 20 years, i.e. 1.3 kg CO2/m2/year. The potential impact will be even greater if the innovation is deployed internationally. Indeed, the French electricity consumption mix is one of the lowest in CO2 in the world. Each square meter equipped with Cool Roof can thus avoid even more GHG emissions elsewhere: 120 kg CO2e (6.0 kg/year) in Europe, 150 (7.5 kg/year) in the United States, 320 (16 kg/year) in China, or 460 (23 kg/year) in India.

Understand in picture

The projet in details

What is the issue addressed?

Adaptation of existing large buildings to overheating (without air conditioning)

How is the problem solved?

Action on the albedo of the envelope thanks to a reflective paint

What is the customer target?

Owners & users of large buildings

How is this solution different?

Technological alliance with leading industrial players, brand awareness, IoT monitoring, solidarity cluster

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The team

Roland Soun

Julien Martin-Cocher

Shareholder via an organization

Frederic Lachevre

2022 Firefly Ant Bee

Ronan Caradec

Scientific Committee opinion

The exchanges were very rich and instructive, allowing them to understand the differences with the numerous other existing solutions. The chemical composition, the method of application, the thickness of the layers, and the durability... are some of the subjects that were discussed during this exchange. We can thus note that the integration of oyster shells in the formulation makes it possible to reduce the need for titanium dioxide (which brings the whiteness necessary for a high reflectivity), which makes it possible to improve the life cycle analysis of the product. For durability, the choice was made to use an acrylic formulation rather than polyurethanes, which are synonymous with high VOCs (Volatile Organic Compounds) that can represent a health risk. This exchange clearly shows a positive analysis, both on the relevance of the Cool Roof innovation (performance and composition) and on its potential on an international scale (differentiation, ease of implementation...).

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