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The Extent to Which Hemp Insulation Materials Can Be Used in Canadian Residential Buildings

Author

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  • Chun Hua Julia Liu

    (REBEL (Resource Efficient Built Environment Lab), Edinburgh EH11 4BN, UK
    School of Engineering and Built Environment, Edinburgh Napier University, Edinburgh EH11 4BN, UK)

  • Francesco Pomponi

    (Institute for Sustainability Leadership (CISL), University of Cambridge, Cambridge CB2 1GG, UK)

  • Bernardino D’Amico

    (REBEL (Resource Efficient Built Environment Lab), Edinburgh EH11 4BN, UK
    School of Engineering and Built Environment, Edinburgh Napier University, Edinburgh EH11 4BN, UK)

Abstract

The embodied carbon of building materials is a significant contributor to greenhouse gas (GHG) emissions. Hemp is widely acknowledged as the most used vegetal insulation in building and construction due to its comparable thermal properties and better environmental performance than that of mainstream insulation materials (MIMs). However, the application of hemp insulation materials (HIMs) in Canada is still in its infancy. Canada is currently the largest hemp oil and seed producer in the world. Most recent research on hemp in Canada has focused on the impact of legalising marijuana and the popularisation of hemp health products and cannabidiol (CBD). There is a lack of studies addressing the holistic impact of hemp in reducing emissions in Canadian residential buildings. This paper exams the feasibility of large-scale hemp cultivation in Canada and the suitability of HIMs for Canadian private dwellings. Material flow analysis (MFA) and life cycle assessment (LCA) were applied to evaluate different levels of carbon mitigation over time produced by HIM substitution. The results show that Canada has sufficient farmland and perfect geographic location and weather to implement large-scale hemp cultivation. HIM substitution can be accomplished for 81% of Canadian residential buildings. Full HIM substitution fulfilled through 5% hemp fibre insulation (HF) and 95% hempcrete (HC) will mitigate 101% of the GHG emissions caused by existing MIMs and contribute up to a 7.38% reduction in emissions to achieve the net zero emissions target by 2050.

Suggested Citation

  • Chun Hua Julia Liu & Francesco Pomponi & Bernardino D’Amico, 2023. "The Extent to Which Hemp Insulation Materials Can Be Used in Canadian Residential Buildings," Sustainability, MDPI, vol. 15(19), pages 1-31, October.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:19:p:14471-:d:1253444
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    References listed on IDEAS

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