My first post! How exciting. Now on to the topic.
I am a 3rd year Civil Engineering student, fascinated by permaculture and alternative building, and in particular WOFATI/PSP style eco-homes. I've read through the forums, read the $50 and Up Underground House Book, listened to the podcasts, and I've certainly learned a lot, but there's something i still want to know.
I understand that this style of building is illegal in most of the country (except where there isn't a building code of course), but I am struggling to find out why exactly that is. Is it the lack of a concrete foundation? "Inadequate ventilation"? Inconsistency in the strength of the materials used? What? Can anyone help me understanding this?