The bales are enclosed in fireproof stucco. In addition to the stucco, the bales are tightly packed, making them difficult to ignite.
A freind of mine got a great deal on one. It is a wonderful house. Her entire electric bill for a year, in Yuma Arizona, is less than $500. That includes air conditioning and heating.
Super insulated, very secure house. Walls are about 3 feet thick.
Interesting.
That’s pretty neat.