Earthship construction is a technique of building developed by Amercian architect, Mike Reynolds. He’s famous for using ‘rubbish’ and earth as building materials. We love his work. We chose to build an earthship wall as we had a small budget and a lot of excess sub soil left over from our initial earth works. We also knew we could get car tyres for free from the local car yard who have to pay to get rid of them.
We hadn’t built one of these before hand, so spent some time on youtube to learn how (there are lots of clips to watch).
While it’s pretty easy, it’s also a lot of hard work. It would have been whole lot easier if we had heaps of people to help, one of these cool whakker packer tools and *dry* gravely soil instead of the wet, sticky/clay sub soil from our place. This last tip is a really big one, the guy on the youtube video we watched made it look like a walk in the park with his dry, sandy soil in New Mexico. He just kind of poured it into the tyre and patted it down, in contrast we shoveled, packed, whacked, shoveled more, had a cup break to chill out a bit and then came back and whacked more. It was a bit of a mission. But it’s a bloody strong wall and used up a lot of our excess sub soil for which we are stoked.
Starting out, we cleared the space, tacked on some white geo-fabric to the bank (see above) to keep it from dropping crumbs and made a level pad to start laying tyres. As we were almost on bedrock, we didn’t have to lay any sand/concrete for foundations, we just leveled it off.
As soon as you start building up from your first tyre, you have to find a way to plug the holes so the earth doesn’t just fall through. We had a whole pile of carpet tiles the previous owner had left under our house which fitted perfectly, so we used them.
We also back-filled the area directly behind the tyres with 20mm blue metal and ag pipe (not pictured) to guide excess water out of this area to a safe spot.