When he first looked at the silo, he had to use a boat as it was flooded with three
feet of water, but now the Pedens’ home is very comfortable. It is always the same temperature inside because the 18-inch thick concrete roof is covered by 4 feet of earth, and no sound from outside can be heard. There are no windows and
only one skylight. The insulation is excellent, and they could survive a nuclear
explosion capable of destroying a city. The Pedens plan to build an ordinary house
above the underground building.