Hempcrete FAQ’s



How long does Hempcrete last?2022-12-15T16:16:48+08:00

Hempcrete has been used around world for many years.

It is a durable building product that can last a long time. Like any building, a hempcrete home should be treated like any other home.

Where does Hempcrete come from or how is it made?2023-06-12T13:30:50+08:00

Hempcrete is hemp hurd mixed with lime and water. Our mixture is as follows:

  1. Hemp hurds (also known as shives)
    We use Tradical Chanvribat Hemp from Ozhemp
  2. Lime as the binding agent
    We use Tradical Thermo Formulated Lime Binder from Ozhemp and,
  3. Water
How is it used in buildings?2022-12-15T16:16:39+08:00

Hempcrete is used as a covering within timber framework walls or or ceilings in place of insulation, and then covered by special breathable renders.

What Is Hempcrete?2022-12-15T16:16:35+08:00

Hempcrete is an bio-composite, environmentally friendly building material used in place of traditional construction materials for insulation and rendering.

Is Hempcrete more expensive than other building materials?2022-12-15T16:16:30+08:00

Yes, roughly 20% more and this is mostly due to the manufacturing process and distribution costs. The intense labour factors drive the prices, but with modern technology such as mechanical spray application, we can achieve costs within the same price category of conventional double brick construction.
Hempcrete is quickly becoming a popular industry within Australia and manufacturing facilities are slowly opening with the aim to reduce costs and make hempcrete affordable.

Is Hempcrete as strong as concrete?2022-12-15T16:16:26+08:00

Hempcrete has some compressive strength, however not enough to support structural loads, therefore the use of timber framing encapsulated in the wall is the method of choice.

Can I use Hempcrete for my house slab?2023-04-17T15:54:24+08:00

Yes. hempcrete can be applied to solid natural ground and intermediate floors. However, there is a process in doing so and is dependent on the desired floor finish and budget.

Does Hempcrete have good insulation properties?2022-12-15T16:16:09+08:00

Yes. Hempcrete provides excellent thermal qualities. A hempcrete wall thickness of 300mm will achieve an R value of 3.5. Bricks have an R value of 0.5. Due to its permeability the hempcrete walls will maintain a constant ideal temperate inside the home, reducing the need for heating & cooling.

Does Hempcrete insulate against noise?2022-12-15T16:15:54+08:00

Yes, hempcrete has good acoustic absorption thanks to its permeability and its thickness to absorb sound waves.

Is Hempcrete pest and termite resistant?2022-12-15T16:15:46+08:00

Yes and is one of the many unique qualities of hempcrete. Tests performed have confirmed termites will resist eating hempcrete due to the ph level of the lime.

Is Hempcrete fire retardant?2022-12-15T16:15:41+08:00

Yes. When exposed to an open flame, such as a blow torch, hempcrete doesn’t smoulder or ignite. Ozhemp Tradical Hempcrete is CodeMark certified BAL-FZ suitable for use in all bushfire prone areas (low to flame zone).

Can you get as good a finish as say a gyprock/plaster wall?2022-12-15T16:15:21+08:00

Yes, there are many options for rendering over hempcrete walls. It can also be applied in wet areas. We just add a water repellent agent in the render mix. Refer to our images of renders.

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