Hemp has been used in construction for thousands of years, but it's only recently that it’s incredible environmental benefits have crept into mainstream awareness.
In today's episode, we continue exploring renewable materials. We'll investigate the design of a hempcrete extension to an existing Federation House located in the heritage listed suburb of Ashbury in inner suburban warm temperate Sydney. Architect Emily Knight, the director of Emily Knight Design shares the inside story on her AL House.
Today we'll learn about;
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MORE INFORMATION
Find everything you need on the Renovation Collaborative website.
www.renovationcollaborative.com.au
KEY POINTS SUMMARY
1. The biggest environmental change can be effected through improving existing buildings. Currently in Australia, there is no requirement to upgrade your existing home as part of your renovation. However, Emily always encourages her clients to set aside some budget for this important work to ensure long term comfort and energy efficiency.
2. Hemp is used in construction in a range of formats. Hempcrete, as covered in this episode, also hemp blocks, hemp sprayed onto a frame and hemp panels.
3. Hempcrete walls are non-structural. They're formed up around a timber stud frame.
4. Hempcrete walls can be finished in a number of ways. They can be left unfinished, coated with natural breathing lime render, or a clear, penetrating, breathable sealer coat. Externally, it usually requires extended roof overhangs to prevent weathering.
5. In Emily's experience, the cost of Hempcrete construction in Sydney by a subcontractor was approximately on par with cavity brickwork. Historically, hemp buildings have been constructed by a community of unskilled friends and family, enabling much lower labour costs.
6. Hemp offers a multitude of benefits:
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