• info@justbiofiber.com
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Sustainable Building System with Carbon Capture


What are the JBF blocks made of?

Our Blocks are made of:

  1. Hemp Hurd/Shiv – The wooden core of the Hemp Plant
  2. Lime – Proprietary mix
  3. Sand – Factory Coating
  4. Internal Structural Composite Frame – Anything BUT plastic!

The hemp does not contain any THC or CBD – it is a textile grade of the hemp plant.

What are the block’s Dimensions & Weight?


All Blocks: 21.332 x 10.666 x 8.000″ (541.83 x 270.92 x 203.20mm)


Residential Block: 30.0Lbs (13.6kg)
Commercial Block: 32.5Lbs (14.7kg)

Do the JBF Blocks Burn?

No, they don’t!

We have achieved a certified 2-hour Fire Rating.

As well we have a rating of Zero Smoke Development & Zero Flame Spread!

Are the blocks mould and insect resistant?


Lime is naturally mould and insect resistant.

That is why lime-wash is used on barns and chicken coops.

  • Lime has a high pH (alkaline) which acts as a fungicide.
  • Lime is naturally antimicrobial and repels bugs and other undesirable insects.
How you do find studs in the wall?

Our structural frame (buried inside each block) has 5.333″ O.C. (On-centre) struts.

Every 3 struts there is a 16″ O.C. stud, which matches typical residential construction.

Does Hemp contain any THC?

No, Hemp contains less than 0.3% THC and is not psychoactive.

Please visit https://ministryofhemp.com/hemp/not-marijuana/ for a very concise overview.

How are the walls assembled?
  1. The Bottom Strip (composite) is laid down and tied into the foundation
  2. Flax-Lime Mortar is applied to the bottom strip to reduce thermal transfer
  3. Glue is applied to the Bottom Strip to lock onto the blocks
  4. Blocks are placed onto the Bottom Strip
  5. Flax-Lime Mortar and Glue are applied to each block
  6. Blocks are placed onto each other in an interlocking pattern
  7. When all courses (rows) of the wall are assembled, the top interlocking caps are cut off
  8. The Top Strip is laid over the block wall and tied into the wall using bolts
Can you use the JBF Blocks below-grade (underground)?

The JBF Hemp-Lime blocks cannot be used for below-grade (underground construction)
This is due to the natural hemp-lime mix decomposing in soil.

The hemp-lime can be broken away from the structural frame of any unused blocks or cut blocks and composted to provide rich nutrients for the soil.


We do have an alternative product for below-grade applications.
Please contact us at info@justbiofiber.com for more information

Can the blocks be cut?

Yes, blocks can be cut with standard power or hand saws.

A Band saw is highly recommended for large numbers of cuts.


The blocks can be cut to form any other angle, but will not interlock.

This requires lath (mesh) over the male connections to lock them in place.

Is it faster to build with JBF blocks?

Actually yes!

Many people think that brick construction is slower, but we have achieved significant speed advances over the span of our current projects.

What finishing can you put on the blocks?

We ship Hemp-Lime Blocks with a Lime-Sand ‘Factory Scratch Coat’

When the walls are constructed, a final layer of ‘On-Site Scratch Coat’ is applied.

We currently recommend two layers of lime-sand render (plaster) for interiors, and multiple layers of lime-sand stucco for exteriors.

What is the availability of ordering blocks?

For more info please contact sales@justbiofiber.com for updated timelines.

How do you ship the JBF Blocks?

We ship on 53′ trailers which can hold 19 pallets.

Each pallet contains 80 blocks, which allows 1,520 blocks per trailer.


A typical residential home is around 3200 blocks.

If you are interested in partnering with us we would love to hear from you.