Construction
A “traditional” earthship tin can wall is made by horizontally stacking tin cans in a concrete matrix. The cans are laid side by side and in alternating rows, similar to bricks. This is done simply and efficiently, using batches of concrete between the cans. The consistency of the concrete must be relatively thick, so as to hold its form and the tin cans in place. A surprisingly large number of cans are required.
The method for stacking the cans involves creating a row of cans separated by hand-formed “lumps” of concrete. The layout of a row is can, concrete, can, etc. This is then repeated, except that the alternating pattern is reversed, so that every can is laid on top of a concrete “lump” below it. This continues until completed, or the weight of the wall and the hardness of the cement seem questionable in terms of solidity. At that point it would be wise to wait for the wall to harden, but the laying time for cans and concrete is such that by the time a builder makes it back to an area that was recently laid it has had time to set. It is a judgment call as to whether or not the builder should continue, but by the next day or even later in the same day building can resume.
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