Precast building elements with lower embodied carbon
Through material-efficient structural design and bio-based, carbon-storing hempcrete infill.
HempCon 3D building elements
HempCon 3D is a precast building element system for walls, roofs and floor slabs. Each element combines load-bearing reinforced-concrete ribs with bio-based hempcrete infill. The elements are manufactured off-site using Ekotekt’s patented robotic 3D-printing process, then delivered and installed like conventional precast elements.
Build lighter
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Build with lower embodied carbon
Use up to 70% less concrete and replace non-structural mass with bio-based hempcrete that stores biogenic carbon.
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Reduce transport and lifting demands
Around 40% lighter elements can reduce transport weight and required lifting capacity, while making on-site handling and positioning easier.
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Reduce loads on supporting structures
Lower-weight elements reduce permanent loads and may reduce the material required in supporting structures and foundations
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Support moisture resilience and indoor comfort
Use hempcrete’s thermal insulation to support indoor comfort, while its vapour permeability and moisture-buffering capacity help manage moisture and moderate indoor humidity.
HempCon 3D installed in Denmark
A full-scale external load-bearing wall element was transported, lifted and installed at a residential project using established precast construction practices.
Aarhus, Denmark · Residential demonstration · External load-bearing wall · Installed 2026
Implement easily
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Keep the design flexibility of precast concrete
Choose element dimensions, openings, interfaces and facade finishes to suit your project’s architectural and structural requirements.
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Meet code without a new approval route
Use established Eurocode methods to design and verify the reinforced-concrete load-bearing structure within the standard BR18 permitting process. No separate approval route is required for the construction system.
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Target costs comparable with conventional precast
Cut material and logistical costs by reducing concrete and rebar consumption, transport, and heavy-lifting needs.
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Use established precast workflows
Work with conventional concrete, reinforcement and established precast connection principles. Elements are manufactured off site, then transported, lifted and installed using standard precast equipment and site practices.
How we work
A familiar precast project process, from first discussion to delivery and installation.
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Tell us about the building, project stage, intended application, location and programme.
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We assess where HempCon 3D could fit and outline the proposed scope, responsibilities, programme and pricing.
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Your project team completes the design and engineering with Ekotekt’s support. The elements are then produced by Ekotekt.
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Qualified local contractors transport, lift and install the elements.
Selected Awards
Ecosystem & Support
Updates
Frequently Asked Questions
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Our current pricing is comparable with conventional prefabricated building elements.
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Ekotekt develops the element design with the project’s structural engineer, who verifies and signs off the structure for each project.
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No. The load-bearing structure uses conventional reinforced concrete. Hempcrete is used only as non-load-bearing insulating infill.
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Using familiar precast concrete connection methods. No proprietary jointing system is required.
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HempCon 3D elements are produced in Aarhus, Denmark, with a capacity of 40 m² per day.
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Ekotekt plans delivery and installation with the project contractor and local service providers. Local specialists carry out transport, crane work and installation.