I've been finding some good links: http://www.earthbagstructures.com/articles/kayespwa.htm And info on quincha and earthquakes: http://www.practicalaction.org.uk/disaster-reduction/earthquake_housing This is a video on pau-a-pique (Portuguese version of quincha. It is short and excellent. http://www.youtube.com/watch?v=TK74LFiBQFk I suspect that anchored metal roofing would be safer in a hurricane, than flying clay roofing tiles. Lots to think about.