Hi there, we are about to start a sustainable project in the Gulf islands of British Columbia and I am wondering what is the best natural building approach for here. It does not seem to freeze much here but the average temperatures for December/Jan are around 3 degrees c. We wanted to build with earthbags as we have some experience with them, but now I am concerned if there will be enough insulation. I know of someone who built with Cob not so far from here, at the south end of Vancouver island and he recommends insulating the north, west & east walls. The thing is straw bales are hard to get here and expensive, same deal with Pumice, so I was thinking of woodchip clay or buying cellulose, both of which I would need to create forms for around the earthbags.
I would appreciate any ideas and or feedback from people living in this area.