Hemp is making a major comeback around the world. In the U.S., five states have legalized the recreational use of cannabis and hemp-based building materials are now gaining popularity.
To create a solid—yet breathable—wall system, hemp hurds were mixed with lime and water on-site an poured in-between the exterior supporting studs in lift.
As USA Today notes, hempcrete is actually less like concrete and more like infill straw bale, as it is non-structural. The insulating quality is r-2.5 per inch and it has the unique ability to capture airborne pollutants over time—absorbing carbon when it is grown and in place.