Hempcrete is a biocomposite material that consists of the woody inner particle of hemp stem called hurds, lime based binder and water. Binders might include different additives.
Different formulations produce various density hempcrete insulation with different thermal properties. The lighter the mix the more energy efficient it is.
All ingredients are placed inside a mixer in a specifiс order and within a few minutes a porridge like material is produced and ready to be applied. Hempcrete cures by absorbing carbon dioxide from the atmosphere and eventually turns into porous stone.
Curing times depend on weather conditions, thickness, water content and areas of application.
New or Existing Walls
Roof and Attics
|Hempcrete||Concrete Blocks||Poroton Blocks (Clay)||Thermal Insulation||XPS, EPS (Polysterene Insulation)|
|Most ecological insulation materials have a relatively low bulk density. So they store heat poorly. They cannot be used as either infill or masonry.||XPS and EPS are very light in weight and therefore do not store any heat / cold. Also, due to their low weight, they cannot be used for either infill or masonry.|
|Does not reflect Heat||Does not reflect Heat||Does not reflect Heat||Does not reflect Heat|
|Insulation is limited, usually an ETICS must also be installed||Insulation is limited, usually an ETICS must also be installed|
|Limited. Many thermal insulation boards tend to mold when there is too much moisture and only poorly insulate when damp.||XPS and EPS are not open permeable.|
|No influence on air humidity||No influence on air humidity||No influence on air humidity||No influence on air humidity|
|CO² positive||Massive CO² emissions in production||CO² positive||CO² positive, massive CO² emissions in production and disposal|
|Waste after use||Waste after use||Waste after use||After use hazardous waste|
|As a monolithic construction also durable for a relatively long time, not with ETICS. Not reusable||In the case of a monolithic construction, it also has a relatively long shelf life, but not with ETICS. Not reusable||Not very long lasting||Sehr kurze Lebenszeit|
|Also time saving with monolithic construction, not with ETICS||Also time saving with monolithic construction, not with ETICS||Intricately work||The material costs little, but the working hours are many.|
- Thermal Conductivity: 0.06(W/mK)
- R Value: 2.5 per inch
- Density: ρ = 260 kg/m3
- Compressive strength: 1MPa
- Mean Acoustic absorption Coef: 069 NRC
- Fire test: 15 cm (6 inch) - El 60 min
- Specific heat capacity: (с= 1700 J/(kg·K)
- Water vapour permeability: ∂ = 0.131 mg/ m · h · Pa
- Water vapour diffusion resistance factor: µ = 5.50
Hemp insulation board is a product that has been developed by Hempire. It consists of hemp hurds and natural binding glues.