for Hempcrete Workshops schedule go here
Non-toxic, breathable, carbon-negative
Hempcrete is a natural, renewable, alkaline, energy efficient insulation
THC price for healthy, breathing walls in your new home or retrofit: ~$24.20/cubic foot
(supply and install)
Bag dimensions: 31" x 14" x 10" (78 x 36 x 25cm)
For bag/pallet or LCL please use our order form
Freight Estimates (US$):
Eastern USA - $5-6,000
Mid USA - $6-7,000
West Coast USA - $7-8,000
Australia/New Zealand ~$7-8,000
Note:E.I.N. or Federal Tax ID on the invoice is required for all orders into USA.
Weights and Measures
1 x 15 kg bag of Hemp mixed with our 25 kg bag natural cement will make ~4.5 to 5 cubic feet of ”Hempcrete”
Q. How many bags of Hemp for 12" thick wall ?
A. Length of wall x Height of wall = total square footage. Divide by 4.5 = number of 15 kg (33 lbs) bags of hemp you'll need for 12" thickness.
Q. How many people do I need to Hemp Bust my new house or retrofit ?
A. 5-6 with enthusiasm !!!
Q. So - how much will it cost me to cast my Hemp/Lime house?
A. 1 person mixing, 1-2 people forming, 2-3 people placing = 5-6 workers at their local hourly rate per person (and depending on size of mixer) to cast an average of ~100 square feet per day (~2.4 m3).
Example: 1000 square foot house with 9 foot ceilings will require (for walls only) 144 bags of hemp + 144 bags of iBinder + ~8 days to install.
Allow US$28/cubic foot for our hemp-busting team to supply all materials and labor to form/box/shutter, mix and cast Hemp/Lime into your project - everything included :-)
If interested we invite you to complete our building survey form here and one of our Hemp Team will make contact to discuss your project.
If you figure on doing most of the install yourselves then we suggest you still hire one of our trained team for a week to help get you set-up and organised - for this we charge a flat rate of $4200. contact us here for more info.
A ton of Hempcrete is estimated to absorb and sequester an additional net ~249 kg of CO2 over 100 years.
CO2 sequestration - Hempcrete is a carbon sink with a low carbon footprint. With 80-90% of Hempcrete composition as hemp shiv, the majority of CO2 sequestered by Hempcrete is in the hemp growth with the remainder absorbed in the process of “carbonation”. This is the process where the lime-based binder absorbs carbon from the air continuously over time, petrifying the hemp shiv.
Generally, Hempcrete is estimated to sequester 110 kg per cubic metre (depending on transportation) which means large-scaled projects have the capabilities of drawing tonnes of CO2 out of the atmosphere.
1 cubic meter (m3) = 35 cubic feet (f3)
1 cubic yard (y3) = 27 cubic feet (f3)
1 Kilogram = 2.2 pounds
1 Metic Ton = 1000 Kilos or 2200 pounds
Typical Insulation Values
R-value (US) = RSI × 5.678263337
RSI (SI) = R-value × 0.1761101838
Construction costs may be reduced by:
- Shallower foundations
- 30-40% less lumber, labor in framing
- Lower transport costs of materials to site
- Lower finish costs
- Discounted Insurance costs
- Reduced mechanical (HVAC) requirements
- NO termite fumigation needed after build
Typical Hemp Hurd (Shiv) Composition
Cellulose: 44 - 55%
Hemicellulose: 16 - 18%
Lignin: 4 - 28%
Extractive Substances: 4 - 18%
Other Substances: 6 - 7%
Optimized Energy Model Specifications (56kb)
Hempcrete Tri-Fold (2.9mb)
Information Paper from Bath University (373kb)
Hurd Specifications (57kb)
Thermal Mass (41kb)
for USA/Canada customers order here
Hemp Technologies assumes no liability from those who decide to mix and use DIY “Hempcrete” binders. Customers should consult local building permitting offices and/or use a licensed general contractor, architect, and/or engineer for all construction projects."