Why is hemp not more widely adopted in the construction industry? Is it its drying time? The material’s inherent challenges, such as mix inconsistency? Or the lack of expertise?

    Prefabrication provides a clear solution to many of the problems identified in our research. Precast hemp bricks ensure standardized material quality while significantly reducing the construction time. Nonetheless, this approach invites us to also reconsider the way we use the materials and raises the question: Are we using hempcrete correctly? Should biodegradable materials be used in a way that is adaptable, ensuring disassembly during construction so that the building can be altered without generating waste?

    This is why reversible design, together with making hemp construction more prevalent and democratizing access through 3D printing and open-source joinery, is one of the central principles of our design methodology through Hemp Joint. To achieve this, we developed compact, simple, and reversible joints for five common building elements: insulation for load-bearing walls, interior walls, roofing, finishing panels and electrical openings.

    Hemp Joint is designed as an online platform that allows users to download the files needed to print the required joints by simply inputting the desired material and wall dimensions. Users will then be able to visualize the assembly process, generated from their data through a Python script. Hemp Joint thus provides constructive solutions and the associated models, offering the possibility of producing as many parts as needed for a given project.

    By facilitating access to these tools, Hemp Joint seeks to broaden the adoption of sustainable construction practices and to allow hemp to move beyond its current status as a niche material.

   This project was exposed in the European Forum on Hempcrete Architecture 2026.