Tires really are an excellent building block. It keeps the earth in, and all the things that would effect the earth out.
The only downside is if you do not like the bumpy mud inner wall surface, it is quite a bit more work to do anything else. But, you could always put firring strips and sheet rock just like a "normal" house and no one would ever know.
Yeah, I think if you build an earthship part of the charm are the bumps in it! ;-)
yup that is true.. including real bad pests like termites! I have tested that in a termite forest!
I opted for the bumpy finish on mine, saved a ton of work! And yes you can finish it in any way you like.. most people who visit my Earthship can't imagine there are tyres behind the mud plaster, even when I tell the they're there!