Hemp may have a low recognition factor as a building material, but some savvy early adopters are using this ancient plant for qualities such as minimal environmental impact, good acoustics and fire resistance.
Many builders have had a concrete and formwork failure that they would rather forget. It’s an area of construction where listening to the wisdom of experienced tradespeople is vital, but the following pointers may also help.
Concrete on its own is not a waterproof material in the sense required for a habitable space. To achieve such functionality, two procedures need to be followed, as outlined here.