Hempcrete

Hempcrete is a bio-composite material made of the inner woody core or “shiv” of the hemp plant, mixed with a lime-based binder. The hemp hurd has characteristics that adapts extremely well with the lime, making it unique to this practice.
The result is a lightweight insulating material weighing about one seventh the weight of concrete. Fully cured hempcrete remains permeable and has excellent performance in thermal gain and insulation.
Supported by a lightweight timber structure, hempcrete is finished externally with geothermal render and can be left exposed internally or replicate the external.
Hempcrete requires no chemicals and is pest and rodent resistant including white ants.
it does not rot or mould and has carbon capture of 200kg/m2*
Hempcrete is fire retardant rated for BAL FZ (60-60-60) making it one of the best products in the world.

*Based on wall thickness of 250mm

How is Hempcrete applied?

Casting In Situ

Casting in situ has been the conventional method of hempcrete installation for decades. It requires a temporary formwork system attached to the subframe and is poured and tampered in. The mixing method requires a pan mixer and can produce Hempcrete at approximately 0.7m3 / Hour (based on a national average)
Casting in situ requires much labour to apply the formwork in layers as you work your way vertically. The formwork must be convenient to the installers of the hempcrete in order to maintain good consolidation and consistency.
The labour required is abundant yet gives an excellent finish of the natural product for the visual outcome.
Hempcrete has a very organic, relaxing and earthy appeal when it is left exposed and is a fantastic feature for any home which will please the eye to those who appreciate organic matter in its existence.

Mechanical Spray Application

Mechanical Spray application

The mechanical spray application of hempcrete is relatively new to the hempcrete industry yet carries much more benefits.
To describe simply, the hemp and the binder are transferred from various machines through pipes and meet at a distribution point known as a lance. The application does not require premixing as the ingredients chemically bond in the air as it is applied. This method allows excellent consolidation and consistency of the product.

The distribution of hempcrete through this method is calculated at an average of 2m3/Hour.
Spray applying hempcrete requires only one side of the wall to be formed, to which saves on waste, material and labour.
Typically, this method is not for visual effect or to be left exposed, however is up for discretion. (see cast in situ application)
Rendering (with lime render) is highly recommended due to the future performance of this application. Using the BCA approved method we can achieve great thermal, sound and fire resistant properties.
The performance of the product is enhanced with spray application, it is a perfect solution to using hempcrete for its properties in a more convenient and faster method that makes hempcrete projects more affordable.

Are there warranties and guarantees?

he Hempcrete co uses the best materials sourced from OzHemp Tradical® and is the only BCA certified method in Australia.
It carries a 5-year warranty when installed by a certified contractor.

Is Hempcrete Safe?

Hempcrete is perfectly safe as a building material for people and pets.
There are no Volatile organic compounds (VOC’S)
No chemicals are added, and it does not release any gasses or toxins.

It is hypo allergenic therefore does not trigger any allergies or respiratory illnesses.

It is highly fire resistant, protecting you and your family by allowing you much escape time in the event of a bushfire and it will not spread in a contained environment.

Hempcrete is one of the safest building materials in the world!

How much does it cost?

Every hempcrete project is unique, Homes by Nature strive to achieve the most cost effective methods of application of Hempcrete to the home builder.
Many considerations are taken into account including, wall thickness, finishes, access and logistics.

Hempcrete is highly energy efficient and has the capability to reduce the running costs of your home. When incorporated with solar passive design and double glazing,  Hempcrete is one of the best insulating materials on the Australian market. Imagine not having to turn on your air conditioner! Reduce your power bills, Saving you money in the future for generations.

What are the Finishes?

Internal
PF70 Scratch Coat
PF80 Batir Secondary Coat
PF80 + Mutifinish topcoat
2 coats permeable paint (optional)

Internal and External
PF 70 Scratch coat and mesh
PF80 Secondary Coat
PF80 + Yellow Sand topcoat
(sandstone oxide)

External/internal
PF70 Scratch Coat
PF80 Batir Secondary Coat
Tradical De’cor finish
oxides can be applied

External
PF70 Scratchcoat
PF80 Secondary coat & mesh
PF80 + Yellow sand topcoat
(2 coats porters limewash)

External/internal
PF70 Scratch Coat
PF80 Secondary Coat & mesh
PF80 + Yellow sand topcoat

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