The Hemp Block USA (HBU) building block system is the culmination of years of experience, knowledge, testing and development. It’s a revolutionary product designed to meet the demands of the contemporary American consumer.

Get an estimate for your project


geosip interlocking hempcrete blocks

HempBLOCK LB 300

Load Bearing System

Interlocking, no mortar required

Length – 1’11 5/8″
Width – 11 13/16″
Height – 1′ 1/8″

Block Types:

  • Standard Block
  • Post Block
  • Bond Beam Block

Where to use HempBLOCK (LB):

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


Masonry Method

Joined with mortar

Length – 1 ’15/16″
Height – 12 2/16″

With a range of thicknesses:
3 15/16″

5 14/16″
7 14/16″
11 13/16″

Where to use HempBLOCKS:

  • Internal insulation
  • External insulation
  • Partitions
  • Renovations

To find out more about the HempBLOCK or to request a quote, call TOLL FREE (855) 795-0012 today (GMT+10).


Superior Properties of the HempBLOCK – a hemp/lime composite

About the HempBLOCK

Hemp and Lime Composite

The HempBLOCK LB300 and its construction system are incredibly quick and simple to install, reducing costs and increasing efficiencies across construction sites.

Each interlocking block:
(L) 1’11 5/8″ x (W) 11 13/16″ x (H) 1′ 1/8″
WEIGHT: 39.68 lbs.
The blocks are 84% hemp and don’t require mortar joints.

Construction time is only 1 minute per square foot. This is half the construction time of building materials with comparable insulation value. The walls can be clad, rendered or plastered. There’s no need for additional wall battens or insulation.

HempBLOCK 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 and significantly reduces heating and cooling costs, and carbon emissions.

The HempBLOCK LB building system is fully engineered and compliant with Internationally recognised European standards and building codes.


Robust and versatile, industrial hemp is the main ingredient in our building blocks.

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 natural Alpine rock.

The mineralogical composition is unique leading to exceptional performance in the following ways:

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

The combination of lime (low fired limestone) and hemp particles creates a flexible hygroscopic (breathable) matrix that 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.

(855) 795-0012 (GMT+10)
Sunshine Coast, Queensland AUSTRALIA
Local office hours: 9am - 5pm

A Public Benefit Corporation

A Public Benefit Corporation


CALL TOLL FREE (855) 795-0012 (GMT+10)
Sunshine Coast, Queensland AUSTRALIA
Local office hours: 9am - 5pm