Dun Agro prefabricated timber-framed hempcrete wall panel, serving as a monolithic, carbon-negative building envelope.

Crane installation of a Dun Agro prefabricated timber-framed hempcrete wall panel, serving as a monolithic, carbon-negative building envelope.

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Dun Agro – Prefabricated Hempcrete Wall Panels

Name: Dun Agro – Prefabricated Hempcrete Wall Panels
Address: Oude Pekela, The Netherlands

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1. The Material: The Dun Agro prefab hempcrete system is a monolithic, vapor-permeable bio-composite envelope solution. The panels are constructed using a structural solid timber frame, completely filled and cast with a mixture of raw hemp shiv (lignocellulosic core) and a highly specialized lime binder. Unlike cast-in-situ hempcrete which requires months of drying time on the construction site, these panels are cured and dried in a controlled factory environment. The material provides a thermal conductivity (lambda) ranging from 0.07 to 0.09 W/mK. Operating without vapor barriers, the high porosity of the hemp-lime matrix mu ~ 3 – 5 actively regulates indoor relative humidity and eliminates the dew-point condensation risks typical of petrochemical insulation systems.

2. The Company & The Story: Based in Oude Pekela, the Netherlands, Dun Agro Hemp Group is a vertically integrated powerhouse in agricultural hemp processing. They manage the entire supply chain—from cultivating thousands of hectares of industrial hemp across Europe to primary fiber decortication and final architectural fabrication. By controlling the raw material source, they operate with a highly optimized, localized Scope 3 emission profile. Dun Agro was the first company in the world to successfully construct a 100% prefabricated hempcrete house, proving that bio-based masonry can be scaled for rapid, industrial residential construction.

3. Technical & Commercial Summary: Commercially supplied as full-scale, crane-liftable prefabricated wall, roof, and floor cassettes, the Dun Agro system replaces traditional brick, synthetic insulation, and drywall layers with a single, breathable monolithic block. This industrial prefabrication drastically reduces on-site labor costs and construction timelines. Due to the rapid carbon absorption of the hemp plant during its growth cycle, combined with the carbonation of the lime binder, each panel acts as a permanent biogenic carbon sink, yielding a deeply net-negative embodied carbon footprint for the primary building envelope.

4. Features

Thermal Conductivity: Thermal conductivity: 0.07 – 0.09 W/mK, providing massive thermal inertia and phase-shift performance.
Vapor Permeability: mu ~ 3 – 5, ensuring a highly breathable, vapor-open envelope matrix.
Zero Petrochemicals: Eliminates the need for EPS, XPS, PUR foams, or synthetic vapor-barrier membranes.
Structural Integration: Hempcrete serves as insulation and thermal mass, while the embedded solid timber studs handle primary structural loading.
Carbon Negativity: Actively sequesters more CO2(biogenic storage + lime carbonation) than is emitted during cultivation and factory production.
Pricing Details: While the initial cost per square meter of a Dun Agro prefab panel may exceed standard stick-frame construction loaded with cheap fiberglass and drywall, the holistic economic value is superior. The prefabrication drastically cuts down on-site labor and assembly time. Furthermore, the combination of structure, high-end thermal insulation, and acoustic dampening into one monolithic delivery lowers the overall lifecycle cost (LCCA). Its massive carbon sequestration provides developers with leverage for achieving LEED Platinum, BREEAM Outstanding, and strict European NZEB (Net Zero Energy Building) compliance.

Verified Sustainability

Certifications & Accolades: Backed by comprehensive LCA data confirming net-negative embodied carbon. Meets strict Dutch and European building codes for structural integrity and fire safety without toxic retardants.

Environmental & Bio-Technical Analysis: [Biolisty Auditor Note]: The Dun Agro system resolves the two biggest bottlenecks of hempcrete: the reliance on wet on-site casting (which takes months to dry) and the structural limitations of hemp-lime. By utilizing pre-dried, solid-timber framed panels, they deliver an industrial-scale bio-composite. The material bypasses Portland Cement completely, relying purely on natural hydraulic lime and organic hemp hurd. It perfectly aligns with the Biolisty mandate for passive circularity and toxics-free construction.

Biolisty Status: Verified by Biolisty. 🟢

End-of-Life

On-Site Mulchable

Scratch Resistance

Low / Scratches Easily

Hygiene & Antimicrobial

High / Actively Kills Bacteria

Surface Texture

Textured / Grainy

International Shipping & Export

Universally Approved / Easy Export

Supplied Format

Solid Panels / Blocks