Can I use hempcrete instead of concrete?

In comparison with concrete, hempcrete: 

  • is much less dense than concrete (at around 300 kg/m3 compared to over 2,000 kg/m3)  
  • is not a load-bearing material 
  • has a plant aggregate rather than stone 
  • has high vapour permeability, as opposed to very low vapour permeability 
  • is an insulation and mass material, rather than a mass material.