Hempcrete is a composite material made from hemp hurd (the woody core of the hemp plant), lime binder, and water. Sometimes sand is added to reduce lime use. Also known as hemp masonry or hemp-lime composite, it is valued for its ecological and economic benefits.
Suitable Climates: Performance varies depending on climate and wall design.
Temperate/Mild: Provides insulation and thermal mass for energy efficiency and comfort.
Humid: Breathable and moisture-resistant, reducing mold and condensation.
Cold: Effective with thicker walls or added insulation.
Hot: Regulates heat and humidity, lowering cooling needs.
Key Points: Hempcrete has low structural strength and requires a long curing time (about 3 months). Its applications are still emerging with limited widespread knowledge.
Benefits: Durable, moisture-resistant, fire and pest resistant, non-toxic, and breathable. It offers good thermal mass, acoustic damping, and environmental benefits including low chemical input, carbon sequestration, and suitability as a dryland crop.
Drawbacks: Low strength limits structural use, and curing time is long. Limited familiarity restricts adoption.
Applications: Used primarily as insulating and non-load-bearing walls in sustainable construction.

Photo from - https://inhabitat.com/the-tiny-hemp-home-of-our-greenest-dreams-is-here/