• very good thermal insulation

• Breathability without condensation for a pleasant indoor climate
  

• Low weight

• significant sound insulation (sound insulation index 37 to 45 dB)

• Durability (dadeCANCRETE is built to last 100+ years
  )

• Reduction of atmospheric carbon as
  important contribution of the construction industry to climate neutrality

• #biogen:
  Hempcrete benefits from the rapid carbon sequestration of the plant Cannabis sativa ssp. sativa. Through their photosynthesis, carbon from the air is stored in a stable form in the fibers. The hemp chips in our dade CANCRETE are 49% carbon.

• non-biogenic:
  The lime binder, which encloses the hemp chips in a hardened matrix, also binds atmospheric CO₂ by carbonation.

• Growing time: 110 days (cultivation possible 2x per year)

• Yield per ha: 15 t hemp, divided into 11.25 t
  stem/stalk, 3 t fiber and 0.75 t dust. The high quality shives (length 1-3 cm) used for Hempcrete make up about 60% of the stem (= approx. 6.75 t/ha)

• CO₂- intake per ha net: 26 t

• CO₂- uptake per ha gross: 27.6 t

• CO₂- emissions from cultivation processes per ha: 1.6 t, primarily from fossil-fuel-powered agricultural machinery (plowing, harrowing, fertilization before sowing, sowing, germination, cutting and threshing, winching, baling and loading).

  Conclusion:

• Per hectare, 6.75 t of hemp hurds are produced, which bind a net 11.7 t of CO₂.

• With 6.75 t of hemp hurds, approx. 70 m³ of Hempcrete can be produced.

simplified per m³ (base: 350 kg/m³):

emissions per m3:

• Hemp: 10

• Lime mixture: 160

• Transportation: 3

Capturing:

• Hemp -184

• Carbonation lime: -94

Total balance approx. -105kg/m3

• dade CANCRETE consists only of natural ingredients that are sourced regionally

• Scientific publications show in life cycle analyses that Hempcrete always has a negative greenhouse gas footprint. (See Ip & Miller, 2012; Pretot et al., 2014; Boutin et al., 2006; Jami et al., 2016; etc.).

• Cradle-to-Cradle: hempcrete is recyclable, resp. can be chopped up and recast into hemp bricks / hemp blocks.

• minimal static properties (processing
  in combination with concrete skeleton or timber construction
  makes sense)

• not suitable as apartment partition wall

• Restrictions in interior construction, comparable
  with gas concrete blocks. e.g. not possible to fix high boxes of a kitchen with dowels

• CO₂ calculation according to KBOB 2022, life cycle assessment data in the construction sector according to ISO 14067 & EN 15804

• Ip & Miller (2012). 'Life cycle greenhouse gas emissions of hemp-limewall constructions in the UK.' Resources, Conservation and Recycling 69: 1-9.

• Jami et al. (2016). 'Hemp concrete: carbon negative construction', Emg.Mater. Res. 5 (2) 240-247.

• Werner (2017) 'Work report for the independent verification of the calculation of the indicator values of hemp-lime bricks made of hemp and lime of the Schönthaler Betonsteinwerk' for the KBOB list, project report according to EN 15804+A2.

• Zampari et al. (2012). 'Life Cycle Assessment of Hemp Cultivation and Use of Hemp-Based Thermal Insulator Materials in Buildings', Environ. Sci. Technol.