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A bio-based insulation batt made from grass, for positive impact and high energy efficiency in buildings

September 2019
August 2022
  • /

Gramitherm by Gramitherm Europe SA implemented by City of Charleroi in Couillet (France) in 2021

Contributes to reduce by 55% the annual energy consumption of gas and by 23% of electricity for this school, and trapped 15 tons of co2eq


A bio-based insulation batt made from grass, for positive impact and high energy efficiency in buildings

  • World Alliance Member
  • Featured Solution
  • Labelled Solution
Label Date August 5, 2022
From Belgium
Maturity stage TRL 9 / CRI 5-6 - Market competition driving widespread deployment &/"Bankable" grade asset class

Gramitherm is a bio-based insulation batt, with a negative carbon footprint ( capturing 1.5kg of CO2eq per kg of product), made from an abundant raw material: grass. Energy efficiency of buildings is one of the main targets to make the world carbon neutral as soon as possible. We aim at delivering a solution to this problem by providing an insulating material at least as good as any other solution on the market for its insulating properties, but whose environmental impact is unrivalled. Indeed our primary component is grass, an element naturally abundant all over the world, with a short reconstitution cycle time. Furthermore, our product has an estimated lifetime of at least 50 years, and it is easily and fully recyclable afterward.( it’s mainly grass after all ! - the product has over 90% of natural fibres right now, and we expect to be 100% natural by the end of 2024).

The Environmental Benefits

  • 1kg of Gramitherm® absorbs 1,5 kg of CO2 equivalent
  • Solution: - 1.5 kg C02eq/kg vs Glass wool 1 kg C02eq/kg

The Financial Benefits

  • Longer lifetime efficiency (50y vs 35y), which gives a TCO more than halved for the solution
  • Solution allows collecting cut off panels from work place and buying them to end customer (up to 4eur/m³), instead of paying for disposal of waste on works place (up to 30 eur/m³)

Target client profile

Activity Region

  • Headquarters
  • Activity

Company Profile

Gramitherm Europe SA

Gramitherm is an insulation panel made from natural grass with a negative carbon footprint.

Headquarters 5060 Sambreville, Belgium
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Networking Partner


As an expert for the innovation scene in energy and environmental technologies, CleantechAlps (Sion, Switzerland) is a hub for the cleantech ecosystem, connecting its stakeholders with relevant partners.

Solutions Associated 65
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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 Gramitherm Europe SA 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.