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Smart waterproofing membrane for flat roof that reflect Solar Radiation to reduce air conditionning & heat urban island

November 2018
June 2023
Gallery SopraStar 1
Gallery SopraStar 1


A waterproofing membrane for flat roofs that mitigates heat urban island effect and reduces summer discomfort thanks to advanced surface radiative properties. In opposition to Cool Roof coatings, SOPRASTAR is a durable waterproofing membrane (above 30 years of lifespan) are able to be applied either on new building & renovation. It fits with the higher standard of roof fire resistance.

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Label Date June 2, 2023
From France
Maturity stage Medium and large scale commercialization
Looking For Network, Visibility

The environmental benefits

  • SopraStar limits the absorption of solar energy on roofs and reduces urban heat islands effect in buildings
  • Fits to new or retrofitting buildings
  • Energy savings on Air Conditioning: 3 kWh/y/m2 of cool roof. (AKBARI 2012) converted to 1.9 to 7.5 kg of CO2 mitigated / m2 of roof
  • Reduce building contribution to ICU: -50% compared to a traditional roof membrane: Savings of 350 kWh/m2/y (KABORE 2018)
  • Reduce indoor temperature for -1 to -2°C in summer

The Financial benefits

  • Long-term economic benefit due to CO2 mitigation & energy saving are estimated by AKBARI at 0.5 to 1 $/m2/y
  • Up to 20% of energy savings for air conditionning

Activity Region

  • /
  • Headquarters
  • Activity

Company Profile

Soprema Group

A market leading provider of waterproofing, roofing and insulation systems with a committed focus on sustainable develop

View company profile Solution website
Headquarters 67100 Strasbourg, France
Contact the Solution Provider Add to Favorites

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Soprema Group has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.