Precast hempcrete blocks make building with hemp more accessable to building companies that do not want to mix and cast in hemp or spray hempcrete. This makes the hempcrete easy to work with for companies already used to working with brick and mortar as the concept is very much the same.
There are companies that have made it easier to have electrics to go through the blocks by having premade holes in the blocks or they can be later added by drilling into the hempcrete blocks.