hemp stone

Natural insulation, healthy construction.

Our hemp wall block combines insulation and wall construction in a single building material. Thanks to its excellent thermal properties, no additional insulation is required—Styrofoam and similar materials are completely eliminated.

At the same time, hempstone regulates humidity and purifies the air, similar to clay. The result: a demonstrably healthy indoor climate.

Request product

Technical data & product features

General product features
    
      Composition
      Hemp, lime, low proportion of cement
    
      Thermal conductivity (λ)
      0.07 W/m·K
    
      Bulk density (dry weight)
      350 kg/m³
    
      compressive strength
      0.4 MPa
    
      Specific heat capacity
      1,870 J/kg·K
    
      sound absorption coefficient
      0,8
    
      Water vapor diffusion resistance μ (wet)
      3,8
    
      Water vapor diffusion resistance μ (dry)
      4,3
    
      Water vapor absorption coefficient
      19 g/m²·√h
    
      Fire behavior (EN ISO 9239-1)
      B, s1, d0
    
      Fire protection, 12 cm, without plaster
      EI 45
    
      Fire protection 30 cm with plaster
      EI 240
    
      Sound insulation indexRw (38 cm with plaster)
      ~48 dB
    
      Sound insulation ratingRw (12 cm with plaster)
      ~41 dB
    
      carbon footprint
      Approx. –100 kg CO₂ per m³ (climate positive)
    
      statics
      Non-load-bearing – combination with supporting structure (timber construction recommended)
    
Available formats
    
        wall thickness
        Dimensions (cm)
        Piece/m²
        Piece/m³
        phase shift
      
        8 cm
        8 × 50 × 20
        9,5
        111
        3 hours 9 minutes
      
        12 cm
        12 × 55 × 20
        8,6
        71
        5 hours 53 minutes
      
        15 cm
        15 × 50 × 20
        9,5
        67
        8:02 a.m.
      
        20 cm
        20 × 55 × 20
        8,6
        45
        12 hours 6 minutes
      
        9.5 inches
        24 × 48 × 20
        9,9
        41
        2:48 p.m.
      
        30 cm
        30 × 55 × 20
        8,6
        30
        6:13 p.m.
      
        38 cm
        38 × 55 × 20
        8,6
        24
        24 hours 30 minutes
      
        Solid brick
        6 × 22 × 11
        42
        500
        –
      
U-values (without plaster)
    
      44 cm
      0.15 W/m²K
    
      30 cm
      0.22 W/m²K