A warm hello and happy holidays form the winter wonder land of Colorado. Thank you Alex Sparrow for a very informative presentation. I have a question. Is it possible to earth-berm a hempcrete building. Rather, is there a natural/none toxic product to water-proof the outside of a hempcrete building, before berming it. I don't want to use synthetics. Or is there another building technique that is more suited for earth berming? I want to build an "Earthship" like building, but don't want to use plastics to seal it. Thank you very much.
