Hemp Biopanels and the Women Growing the Green Construction Revolution
In a field somewhere in southern Europe, a woman tends a crop of industrial hemp. The stalks are tall, dense, and fast-growing — one of the most productive natural fibre crops on earth. She has grown it for years, knows its rhythms and its demands. What she may not know is that those same fibres, harvested, processed, and compressed with a plant-based tannin adhesive, are being transformed into something quite remarkable: an insulation panel destined for the wall of a low-energy building, carrying a thermal conductivity better than many conventional alternatives and a carbon footprint that fossil-based materials cannot match.
The biopanel that ends up on that building facade began in her hands. But the value chain between field and facade — processing, manufacturing, logistics, installation, quality assurance — is one in which women’s participation drops sharply at almost every step. The farmer may be a woman. The installer almost certainly is not.
This post is about that gap, what causes it, and why closing it matters — both for the women who should have access to those opportunities, and for a green building sector that cannot afford to leave talent on the table.
What SNUG’s biopanels are — and why they matter
The SNUG project has developed an insulation panel made entirely from hemp fibres and natural tannin-based adhesives, finished with a protective render of blended cement and geopolymers. The result is a product with no VOC emissions, strong mechanical performance across shear, compression, tensile and bending tests, good fire resistance, and a thermal conductivity below 0.055 W/m·K — comfortably exceeding the Spanish Technical Building Code’s minimum threshold for energy efficiency.
Compared to the petroleum-derived materials it is designed to replace, the hemp biopanel is expected to deliver a 70% reduction in embodied energy and a 50% reduction in CO2 equivalent emissions. Some formulations act as a net carbon sink — meaning the building materials themselves are actively removing carbon from the atmosphere over their lifecycle. For a sector that accounts for roughly 11% of global energy-related CO2 emissions through materials production alone, this is not incremental progress. It is a fundamentally different approach.
Beyond hemp, SNUG’s bio-based panel programme also draws on other agricultural waste streams — rice husk, oceanic Posidonia seagrass, and other local biomass — creating supply chains that are deliberately regional and circular. These are not exotic laboratory materials; they are outputs of the agricultural landscape, processed and engineered into high-performance building components.
70% expected reduction in embodied energy compared to petroleum-based insulation alternatives
50% expected reduction in CO2 equivalent emissions — with some formulations acting as a net carbon sink
The value chain and where women sit within it
The journey of a hemp biopanel from raw material to installed building component passes through several distinct stages: agricultural production, fibre harvesting and retting, processing and manufacturing, quality testing, distribution, installation, and ultimately end-of-life disassembly and recycling. Each stage has its own workforce, its own skills requirements, and its own inclusion dynamics.
At the agricultural end, women’s participation varies considerably by region and crop type, but in many European and Mediterranean farming contexts, women perform a substantial share of agricultural labour — including in hemp cultivation — while remaining significantly underrepresented in land ownership, decision-making, and the economic returns from the crop. The pattern is familiar from agriculture broadly: women do the work, men hold the assets.
Moving along the value chain, the picture shifts. Fibre processing and manufacturing environments — factories, mills, composite panel production facilities — tend to have somewhat higher female participation than outdoor construction, but women remain concentrated in lower-skilled, lower-paid roles, with management, quality control, and technical positions skewed male.
By the time we reach installation — the point at which biopanels are cut, fitted, fixed, and rendered onto building envelopes — we are firmly back in construction’s demographic reality: a workforce that is overwhelmingly male, where women doing hands-on installation work remain exceptional rather than normal.
This pattern — women present but economically marginalised at the production end, largely absent at the installation end — means that the green premium generated by bio-based materials flows disproportionately to men. The women who helped create the raw material receive less of the economic value than the workers who install the finished product. Addressing workforce inclusion in biopanels means addressing this entire chain, not just the visible end of it.
The women who helped create the raw material receive less of the economic value than the workers who install the finished product.
New materials, new skills — and a window of opportunity
Hemp biopanels are not yet a mainstream construction product. They are at the transition point between laboratory validation and industrial-scale production — exactly where SNUG’s current work is focused. The installation techniques they require are not yet codified into established trade practice. The training programmes do not yet exist in their final form. The cohort of experienced installers who could gatekeep entry into the trade has not yet formed.
This is a genuine window of opportunity, and it will not remain open indefinitely.
When a new material enters the market without deliberate attention to who gets trained to work with it, the default is that existing networks and existing demographics fill the space. Apprenticeship programmes recruit from their existing pipelines. Employers hire from their existing contacts. The new skill becomes the property of the existing workforce, and the demographic makeup of that workforce is reproduced rather than challenged.
But when deliberate choices are made — when training programmes are designed with women’s participation as an explicit goal, when outreach targets female vocational students, when pilot projects actively place women in installation roles — different outcomes are possible. The evidence from other sectors that have undergone skills transitions is consistent on this point: the moment of change is when inclusion interventions have the greatest impact, because the incumbency advantage of existing workers is at its lowest.
For biopanels specifically, some of the relevant skills are ones where there is no historical male monopoly to overcome. Working with render formulations, understanding thermal performance, handling lightweight panel systems — these are not disciplines with deep gendered traditions. They are practical, learnable skills that reward careful training and attention to detail. Framing them that way, in how training is designed and marketed, matters.
What the biopanel supply chain reveals about the broader challenge
The hemp biopanel is in some ways an unusually clear illustration of a challenge that runs through the entire sustainable construction sector: the green transition creates economic value, but the distribution of that value is not automatic. It follows the contours of existing power, ownership, and access — unless those contours are deliberately redrawn.
Procurement is one of the most powerful levers available. Public sector clients commissioning green retrofits using bio-based materials can attach workforce conditions to contracts — requiring that a proportion of the installation workforce be drawn from underrepresented groups, or that contractors demonstrate active recruitment from women’s vocational training programmes. This is not novel; social value clauses in procurement are already established practice in several EU member states. Extending them to cover gender inclusion in green construction is a logical and achievable step.
Supply chain transparency is another. The circular economy principles that underpin SNUG’s materials development — tracing the origin of fibres, the processing of waste streams, the end-of-life pathways of components — create a natural framework for extending that transparency to the human dimension of the supply chain. Who grew these fibres? Who processed them? Were those workers paid fairly? Were they given access to the training needed to move into higher-value roles? These are questions that a genuinely sustainable supply chain should be able to answer.
Vocational training systems are perhaps the most fundamental intervention. The pathways through which people enter construction-related trades — apprenticeships, vocational colleges, adult retraining programmes — are where gender composition is most directly shaped. In many EU countries, these pathways have historically channelled women away from construction-related disciplines through a combination of active discouragement, lack of visible role models, and physical and social environments that signal non-belonging. Changing these pathways requires investment, visibility, and persistence — but the examples of success in countries and organisations that have tried existing and are instructive.
The green transition creates economic value — but the distribution of that value is not automatic. It follows the contours of existing power unless those contours are deliberately redrawn.
From farm to facade: a vision worth building towards
Let us return to the woman tending her hemp field. In the world we are trying to build, her relationship to the value created by those fibres does not end at the farm gate. She has access to training in fibre processing. Her daughter, if she chooses, can follow a vocational pathway into sustainable construction — learning to install, inspect, and certify the bio-based panels that those same fibres become. The economic returns from the green building transition flow back into her community, not just to the urban construction firms that currently dominate the installation market.
This is not a utopian scenario. It is a description of what is possible when supply chain design, training policy, and procurement practice are aligned around an explicit inclusion goal. SNUG’s materials development work has created the technical foundation. The institutional and social infrastructure needed to make that vision real is the work that needs to happen in parallel — and it needs to start now, while the market for these materials is still being shaped.
The hemp biopanel does not care who installs it. Its thermal conductivity is indifferent to the gender of the hands that cut it to size. But the industry that produces and installs it is not a neutral object. It is a human institution, shaped by choices — and in a moment of genuine transition, those choices are up for grabs.
SNUG is making some of the most important choices about what sustainable building materials look like. The sector now needs to make equally serious choices about who gets to build with them.
Next in this series: Aerogel Insulation — Closing the Skills Gap with Women at the Front
SNUG is a Horizon Europe project developing circular economy-based sustainable insulation materials and prefab solutions for building envelopes. This blog series explores the intersection of materials innovation and workforce inclusion.
By courtesy of CRES – Centre for Renewable Energy Sources and Saving
