@vicfroh
Nothing structural can be hempcrete. For new builds, it it mostly timber framed (the structure), hempcrete insulated.
You can do hempcrete floors and ceilings (still need timber trusses). The mix is different for walls vs ceilings vs floors. Hempcrete roofs are heavy, so need more timber as structure. Better to use help batts, or other less heavy insulations.
There is a US company making hempwood (non structural), but that's a niche product ATM.