A comprehensive review of hempcrete as a sustainable building material
Innov. Infrastruct. Solut. 10, 97 (2025).
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“Disadvantages and limitations of hempcrete
The application of hempcrete in construction, while demonstrating several promising attributes, is concurrently associated with drawbacks and limitations, as outlined in multiple sources.
Primarily, hempcrete demonstrates poor mechanical performance, rendering it inappropriate for load-bearing construction purposes. Hempcrete’s pronounced porosity contributes to weak adhesion to the lime-based binder, causing it to exhibit an elastic-like behaviour [28].
While this attribute may serve a purpose in circumstances demanding flexibility, such as seismic events where crack resistance is imperative, it also results in considerable deformation when subjected to stress [28].
Moreover, the substantial water absorption capacity of hempcrete poses durability concerns. Prolonged exposure to moisture, without adequate ventilation, gives rise to complications such as bio-decay, salt crystal formation, freezing and thawing, therefore adversely affecting durability [25].
Moreover, challenges lie in the expertise required by designers and contractors to comprehend the specific nature of the product [27]. The necessity for on-site drying before the application of finishes demands time and shelter, further confining its applicability to areas above the damp-proof course [27].
Further challenges encompass the restricted availability of hempcrete in comparison to conventional construction materials. The restricted availability primarily stems from regulatory restrictions pertaining to hemp cultivation in certain countries, consequently limiting its widespread availability. Additionally, working with hempcrete demands labour familiar with both hempcrete and frame structures, which has the potential to further impede the widespread usage of hempcrete in construction [25].
Regulatory challenges
The regulation of hemp cultivation and hemp-based products, such as hempcrete, is marked by significant intricacy and inconsistency, hindering broader application. Varying regulatory frameworks across jurisdictions associated with the cultivation and manufacturing of hemp complicate processes and impose substantial challenges for farmers and organisations [29].
As a result, there is significant uncertainty amongst farmers and organisations, hindering long-term commitments to hemp cultivation [29] and consequently restricting the availability of raw materials for hempcrete production.”
Read more at: https://link.springer.com/article/10.1007/s41062-025-01906-1