A hempcrete wall system is significantly more fire resistant than a typical insulated wall. The shiv within the wall is coated with lime and is finished with about 3/4” of lime stucco on the outside, and 1/2” on the inside.
This has led to increased interest in implementing this material in areas prone to wildfires. The type of detailing that ensures high thermal performance, i.e. the attention to joints at doors, windows, and places where the insulation abuts structural elements, are the same details that make the building even more resistant to fire.