In my continuing search for energy efficient housing, I learned about this company in Memphis Tennessee named Best Domes Instant Structures,built like a giant ice cooler, the double fiberglass shell sandwiches a core of urethane foam and a Thermal Barrier Foil insulation for a very high energy efficient dome R-28. 
It is constructed of molded fiberglass with permanent colors, the dome never needs painting and requires little or no outside maintenance, with the exception of an occasional washing. 

Dome Houses have been subjected to hurricanes in Florida and tornadoes in Mississippi with no structural damage.
A Dome house on Navarre Beach, Florida took a direct hit from Hurricane Opal in 1995. The Dome house withstood 144 MPH winds and 18 foot tidal waves - with no damage.