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Practical Information


Hemp Agronomy
1 Hectare = 2.5 Acres

1 Hectare will produce up to 10T of hemp (UK average is 8T)

60% of the processed hemp crop is shiv

1T of shiv is approx. 50 bales

1 bale of Tradical HF (hemp shiv) contains 200 litres when uncompressed

1 Hectare will produce 5 to 6T of shiv (250 to 300 bales)

1 Hectare will produce enough shiv to build a small house

There are about 540,000 Ha of set aside in the UK

Carbon Dioxide
1 Hectare of hemp will absorb up to 18T of CO2

as it grows (total crop - shiv, fi bre and dust)

The shiv from 1 hectare contains about 10 to 11T CO2

Tradical Hemcrete wall mix contains 108kg CO2/m3 (Spray applied at a density of 330kg/m3)

Tradical Hemcrete wall mix contains around 150kg CO2/m3

(Shuttered and tamped at a density of 460kg/m3)

Tradical Hemcrete roof mix contains 155kg CO2/m3 Tradical Hemcrete wall mix contains 85kg CO2/m3

Walls of Houses
A small semi detached house of 48 m2 GFA with 300 mm thick walls, contains 33 m3 of Tradical Hemcrete

This is 165 bales of Tradical HF and 7.25T of Tradical HB.

This will lock up 3.6T of CO2 in the walls

A small detached house of 52 m2 GFA with 300mm thick walls, contains 49 m3 of Tradical Hemcrete

This is 245 bales of Tradical HF and 10.8T of Tradical HB.

This will lock up 5.4T of CO2 in the walls

A larger detached house of 100 m2 GFA with 500 mm thick walls, contains 120 m3 of Tradical Hemcrete

This is 600 bales of Tradical HF and 26.4T of Tradical HB.

This will lock up 13.2T of CO2 in the walls

Thermal Performance - U-Values
See Thermal Datasheet

300 mm wall gives 0.30 W/m2.K

400 mm wall gives 0.22 W/m2.K

500 mm wall gives 0.18 W/m2.K

Acoustic Performance
See 3c: "Acoustic" in the Technical and Practical section.


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