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?

YouTube video North Port lots

Gernamy Ave design build bunker home

Germany Ave and Basket Street location 

Remember an arch is three times stronger than a square

Metal arched buildings encapsulated with dense closed cell foam waterproofing insualtion will create a home as strong as a monolithic concrete home without using cement and steel pollutants in an attempt to reach zero carbon emmission.