Xanadu nobody has been able to tell why a foam home cannot be built like this one of 40 years ago but nobody has the credentials to seal a set of plans do YOU? My thought of using foam instead of concrete over the steel rebar would be easy to have a change of material NOT SO? Seems nobody knows enough about foam to declare it with a ballistic coating as a roof?
Remember an arch is three times stronger than a square
Strength of a structure comes from the shape and design
Encapsulating the exterior of metal quonset huts with dense closed cell roofing waterproofing insulation reduces energy use by 70% plus creates a monolithic membrane gluing all the panels to the foundation.