The GeoSIP Block

The GeoSIP building block system is the culmination of years of experience, knowledge, testing and development, and is a revolutionary product to meet the demands of the contemporary Australian consumer.


Hemp and Lime Composite

The GEOSIP block and construction system is incredibly simple and quick to install. Each GeoSIP interlocking block is 600 x 308 x 300 mm. They don’t require mortar joints, weigh 18kgs and are 84% hemp.

Construction time is only 10 minutes per square metre!

This is half the construction time of building materials with comparable insulation value. The walls can be clad, rendered or plastered. There is no need for additional wall battens or insulation.

GeoSIP block walls are hygroscopic. They allow moisture transfer through the walls thereby controlling humidity and temperature. This results in constant comfortable room temperatures all year round. This significantly reduces heating or cooling costs.

The GeoSIP building system is fully engineered and compliant with Australian standards and building codes.


Robust and versatile, INDUSTRIAL HEMP is the main ingredient in the GeoSIP building block.

The fibres are stripped from the plant to make fabrics, and the seed is harvested for food. The remaining woody part (shiv) is mixed with a binding agent to manufacture our building blocks.

The INTERLOCKING BLOCKS and INSTALLATION SYSTEM are designed to expedite the building process, reducing overall costs whilst ensuring a faster construction timeframe than traditional building methods.


PROMPT NATURAL CEMENT has been produced for 150 years in the French Chartreuse massif from a natural Alpine rock.

Its performance is exceptional and the mineralogical composition is unique:

  • It is mined rather than extracted from open-air quarries
  • It is fired at a low temperature, which means low CO2 emissions.
  • It develops high strength immediately
  • It creates minimal shrinkage.

The lime (low fired limestone) in combination with hemp particles creates a matrix that is hygroscopic (breathable), flexible and eliminates mould build up in the building.

Alkaline materials such as this Prompt naturally repel insects such as termites. It has a negative effect on their ‘skin’ which deters them from eating or nesting in it!


Superior Properties of the GeoSIP block – a hemp/lime composite


geosip interlocking hempcrete blocks


Load-bearing System

Interlocking, no mortar required

Size: 600 x 308 x 300mm

Block Types:

  • Standard Block
  • Post Block
  • Bond Beam Block

Where to use GeoSIP BLOCKS:

  • Load-bearing walls
  • In-fill walls
  • Residential and Commercial
GeoSIP HempBLOCK Range


Masonry Method

Joined with mortar



Where to use HempBLOCKS:

  • Internal insulation
  • External insulation
  • Partitions
  • Renovations

Installation Guide coming soon

MOBILE +61 416 331 008
Sunshine Coast, QLD Australia

MOBILE +61 416 331 008
Sunshine Coast, QLD Australia