'A roof over our people's heads': the Indigenous US tribe building hempcrete homes

[bucolic_frolic]

5. A strong, renewable, insulative material with low processing costs

Whoa. The Holy Grail. Best thing since Adobe straw blocks and this can probably take all climates. Wonder what the % of Concrete is, or are they binding it with something else?

https://en.wikipedia.org/wiki/Hempcrete

Hempcrete or hemplime is biocomposite material, a mixture of hemp hurds (shives) and lime,[1] sand, or pozzolans, which is used as a material for construction and insulation.[2] It is marketed under names like Hempcrete, Canobiote, Canosmose, Isochanvre and IsoHemp.[3] Hempcrete is easier to work with than traditional lime mixes and acts as an insulator and moisture regulator. It lacks the brittleness of concrete and consequently does not need expansion joints.[3]

Typically, hempcrete has good thermal and acoustic insulation capabilities, but low mechanical performance, specifically compressive strength.[4] Hempcrete's mechanical properties, when used in prefabricated blocks specifically, act as a carbon sink throughout its lifetime.[5][6] The result is a lightweight insulating material, finishing plaster, or a non-load bearing wall, ideal for most climates as it combines insulation and thermal mass while providing a positive impact on the environment.