Millfield.
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Hempcrete and wooden frame house building (ongoing project).
This is an environmentally friendly method of building, using Hemp a tall annual plant grown for its fibre (nothing to do with drugs) and a lime based binder; all produced in the United Kingdom.
The dry hemp stalks (shiv) are cut into suitable lengths and cleaned ready for use. On site the hemp is mixed with a lime based cement before packing into shuttering against the timber frame. When the hempcrete is partially cured the external shuttering is removed.
- Advantages -
- Only a fraction of the energy is used compared to conventional building methods.
- The hempcrete is highly insulating, a 300ml. wall will give a U value of app. 0.2, therefore no more insulation is necessary.
- A hempcrete wall is airtight, achieving below 2.0 cubic meters per square meter per hour @ 50 Pascal of pressure.
- Hempcrete locks away CO2 within its construction. Approx. 40kg. of CO2 per meter square of wall.
- The hempcrete wall can be rendered immediately onto its surface using lime render or have a timber, brick or stone exterior cladding built against it.
- Hempcrete gives a good sound barrier for internal walls.
- Hempcrete is not able to take heavy loads so it fits well into a timber frame construction.
- Hempcrete is resistant to rodents, mould and fungus, it withstands fire, easily conforming to current building regulations.
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