You Won't Get High But You Will Get A Healthy Home

Can you smoke it? 

Believe it not, this is the first question we are asked when people pick up a sample of the Thermo-Hemp. Industrial hemp is the non-intoxicating relative of its more famous cousin, marijuana so NO you can’t cut off chunks and smoke it. But if you live in a house and use Thermo-Hemp Insulation, you will certainly cut your energy bills and have a safer healthier home.

What’s So Great About Thermo-Hemp Insulation?

It is non-toxic and resistant to mould, pests, and fire, making it a good choice for both new build construction and an excellent choice for refurbishments. Plus, it doesn’t cast off any VOCs. It's semi-rigid and never slumps. It is excellent for sound protection and it also has a high thermal mass. It doesn’t release any fibres that can get into your lungs and affect breathing.
Compared to the total energy input (i.e energy required to produce the insulation), Thermo-Hemp reduces the amount of CO2 in the atmosphere by approximately 14.4 kg per cubic meter (Rehberger, 2011).

Example: A typical single-family house with approximately 100m² floor space and an attic insulation need of approx. 35m³. If the attic where to be insulated with Thermo-Hemp they will already have a CO2 reduction of approx. 500 kg prior to installation. 

Below is a comparison showing Thermo-Hemp compared to 2 alternative common insulations, the comparison shows the amount of CO2 which has already been emitted in order to produce the material. The assessment is based on the following parameters:

CO2 balance of a passive house with reference to the attic insulation type used and the energy for its production
(based on achieving a target u-value of approximately 0.10W/m2K)

  1. Treated Floor area: 200m2
  2. Attic Insulation amount: 80m3 (based on 400mm depth (mineral wool Or Thermohemp with a conductivity of 0.039W/mK)
    50m3 (in the case of 250mm of PUR foam with a conductivity of 0.024W/mK)

  3. CO2 emission for the production of one KWh: 0.645 kg/kWh (“Climate Change Report 08/2008”)

Thermo-Hemp Co2 emissions comparison

What do these figures mean? Thermo Hemp Processing Cycle

House A (Mineral Wool) 

  • Equivalent of an average car driven for 41.7 days non-stop
  • A 747 could fly non-stop for 1 hour
  • Taking 5 cars off the road for one year

House B (Polyurethane Foam)

  • Equivalent of an average car driven for 167 days non-stop
  • A 747 could fly 3.3 hours non-stop
  • Taking 20 cars off the road for one year

House C (Thermo-Hemp)

  • Drive an average car for 2 days non-stop and still be carbon neutral

With a polyurethane foam insulation, the CO2 emission to produce 1m3 of insulation is the equivalent of taking 25 cars off the road for one year.  

Where can Thermo-Hemp be used?

  • As an internal wall insulation to existing solid walls
  • Suspended floors
  • Between Rafters & Ceiling Joists
  • In Timber Frame Construction 

Thermo-Hemp Green Product Award

Green Product Award Winner

The Green credentials of Thermo-Hemp were highlighted at The Energy Show 2017 when Thermo-Hemp won The Green Product Award.  



Climate Change Report 08/2008
Bernd Rehberger 2011 “Hemp – Building Material for the Future”




 By Darren O'Gorman, Technical Support, Msc Cpm. HDip Bld Serv.

 Ecological Building Systems

+353 (0) 87 6336516 Mobile 

 046 94 32104 Ireland Office
 01228 711511 UK Office 


Posted on Monday, 17 July 2017
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