CoGreen develops the NoHiRiNoise solution: a hempcrete-based noise barrier for highway and railway infrastructure, made from hemp shives, lime-based binder, and water. The composite has a density of approximately 300 kg/m³ and delivers noise reduction of 45-50 dB, with substantially lower embodied energy and longer service life than conventional noise barriers made of concrete, steel, aluminium, or wood. The hempcrete formulation contributes carbon sequestration through the hemp biomass, with quantification subject to ongoing life-cycle assessment work. CoGreen is at CRL 5, TRL 4, BRL 6: market interest is established (BRL high), the certification process is in progress with expected completion end 2026, and technical maturity is mid-stage.
Product Value Chain by step of production
| Step | Provide quantity and activity |
|---|
| Production and installation |
Hempcrete noise-barrier panels produced and installed at highway and railway sites |
Key Partnerships
International collaboration with hemp-based construction researchers across Central Europe (Slovenia, Slovakia, Austria); architects as channel partners for adoption; infrastructure procurement bodies as customers.
Full business model including pricing verified on customers
Component validation in laboratory environment
Identification of the systemic capabilities
Submitter name
Rebuilt project
Lower-carbon noise barrier with comparable acoustic performance to conventional concrete, steel, or aluminium barriers, plus the breathability, lower embodied energy and longer service life of a bio-based composite.
Principles Circular Product Design
Design products that exist out of materials that can easily be recycled
Alternatives, Competitors
Product
Distribution - Reverse Logistics
Reverse Logistics
Relationships - Market/ or product proposition
New product proposition. Required positioning against established noise-barrier materials, technical validation through certification process, and demonstration against EU CE-marking durability standards.
Revenue Streams - Product
Pay per product
Key Resources - Resources used for the production
Hemp shives (agricultural by-product); lime-based binder; production facility for hempcrete; certification expertise.
Cost structure
Production cost driven by binder content and hemp-shive sourcing; certification investment in progress for end-2026 completion.
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