A sound barrier that keeps working for the environment.
Greenwall is designed to do more than reduce noise.
Greenwall Classic’s hempcrete (hemp-lime) core and living planted surface create the potential for the barrier to store biogenic carbon, continue absorbing CO₂, help intercept airborne pollution and contribute to Biodiversity Net Gain.
Necessary infrastructure can become measurable environmental infrastructure.
Greenwall Classic is our lead product for biogenic carbon storage. Its hempcrete core combines hemp and a lime-based binder.
Hemp absorbs CO₂ from the atmosphere as it grows. When hemp is incorporated into the Greenwall Classic hemp-lime core, part of that biogenic carbon can remain stored within the barrier for the life of the product.
The lime binder also continues to mature after installation. Through carbonation, the lime reacts with atmospheric CO₂ and forms calcium carbonate, taking CO₂ back into a solid mineral form over time.
The hemp stores carbon. The lime continues to mineralise CO₂ as the wall matures.
The precise carbon performance depends on material formulation, manufacturing, transport, installation, exposure and end-of-life assumptions and should be quantified through an appropriate lifecycle methodology.
Different cores. Different carbon pathways. Classic’s hempcrete core supports the stored-biogenic-carbon story. Construct’s mineral or recovered-aggregate fill has a separate material and lifecycle assessment, with potential benefits from suitable material recovery and avoided haulage. Any claim of net carbon removal requires verification across the relevant lifecycle.
02 / Living carbon
Living planting continues to absorb CO₂
Greenwall can support living vegetation such as ivy and other selected species.
As the planting grows, it continues to take CO₂ from the atmosphere through photosynthesis and stores carbon within its biomass.
This creates two different carbon mechanisms within one infrastructure asset:
Inside the wall
Stored in the core
Biogenic carbon stored within the hemp-lime core and additional lime carbonation.
Hemp growth Biogenic storage Lime carbonation
On the wall
Growing on the surface
Ongoing biological growth and CO₂ uptake from the living planting.
Living planting Photosynthesis Biomass
The environmental story
Hemp
Hemp-lime core
Stored carbon
Living planting
BNG + air quality
CarbonSync record
For qualifying hemp-lime installations. Environmental outcomes are assessed separately; a record captures the evidence rather than guaranteeing carbon or BNG performance.
03 / Air quality
Living foliage can help intercept airborne pollution
Vegetation can help capture airborne particulate matter on leaf surfaces.
For roadside, rail, logistics, industrial and urban locations, this creates an additional potential environmental benefit because the living barrier is positioned close to the pollution source.
Living foliage can help intercept airborne particulate pollution while also supporting carbon uptake and biodiversity.
The effect depends on planting, exposure, maintenance and local airflow. This is a potential benefit, not a claim that Greenwall removes all air pollution.
04 / Biodiversity Net Gain
Turn necessary infrastructure into part of the biodiversity solution
Many developments already require acoustic fencing, boundary infrastructure, road mitigation or visual screening.
Greenwall creates the opportunity for that required infrastructure to also support planting, habitat creation and ecological connectivity.
Subject to ecological assessment and the statutory biodiversity metric, appropriately designed Greenwall planting may contribute towards a development’s Biodiversity Net Gain strategy.
Instead of installing an inert barrier and then addressing biodiversity somewhere else, make the infrastructure itself part of the ecological response.
BNG value must be assessed independently by the project ecologist and should not be assumed simply because the barrier is planted.
05 / Development value
More value from the same infrastructure footprint
Noise mitigation
Engineered acoustic performance for roads, railways, developments and industrial locations.
Carbon storage
Biogenic carbon stored within the hemp-lime core, with additional carbonation potential from the lime binder.
Living environmental performance
CO₂ uptake, planted surfaces and potential air-quality benefits.
Biodiversity
Planting and habitat design that may contribute towards the development’s BNG strategy.
One physical asset. Multiple measurable environmental outcomes.
Greenwall is working with CarbonSync to create a digital environmental record for qualifying installations.
Each registered Greenwall asset can be linked to its physical location, material specification, planting, maintenance history and environmental performance.
CarbonSync can record information including:
Location and project reference
Wall length, area and dimensions
Quantity of hemp-lime material
Hemp and binder specification
Estimated biogenic carbon stored
Carbonation methodology where applicable
Planting specification
Plant establishment and survival
Maintenance history
Biodiversity assessment
Photographic and monitoring evidence
Corporate funding or environmental attribution
Move from “this is a sustainable wall” to “this is an identifiable environmental asset with measurable performance.”
07 / Corporate participation
Fund the infrastructure creating the environmental benefit
Greenwall can create a new route for corporate environmental participation.
Corporate emitters and ESG participants could fund defined sections of qualifying Greenwall infrastructure, while the wall itself remains professionally installed and maintained by the contractor.
CarbonSync can then record the participant’s attributable environmental interest against the physical asset and track verified outcomes over time.
01
Developer needs acoustic infrastructure
02
Greenwall provides the living hemp-lime barrier
03
Contractor installs it safely
04
CarbonSync registers the asset
05
Corporate participant funds or is attributed a defined share
06
Environmental performance is measured over time
Don’t just purchase an environmental claim. Help finance the infrastructure creating the environmental value.
08 / Separate environmental ledgers
One asset. Separate environmental ledgers.
A Greenwall installation may create several environmental benefits from the same physical infrastructure, but they must be measured and reported separately.
Carbon
Stored biogenic carbon, lime carbonation and ongoing biological sequestration where appropriately measured.
Biodiversity
Habitat creation and enhancement assessed through the relevant ecological and Biodiversity Net Gain methodology.
Infrastructure
The underlying acoustic and physical performance of the barrier.
Biodiversity units are not carbon credits, and carbon tonnes are not biodiversity units.
This separation is important for credible environmental accounting. A digital asset record does not by itself verify an outcome or issue a carbon credit. Any attribution requires clear boundaries, evidence and safeguards against double counting.
