My brother told me about these folks and I have been enjoying watching them build all sorts of earth bag homes. They seem to use a lot of paints and chemicals, so not really all in for permies, but their building techniques are pretty neat.
I love their stuff too we are getting ready to start our earthbag adventure having some issues figuring out soil type we are about 50/50 clay to sand. Not sure exactly what I need to add depending on where it's going haven't seen a lot of research on it or even got any good opinions LOL