This is a cob wall our class helped built. Cob is just clay soil (10-20% clay soil is best), sand, straw, and water. We harvested all of our clay soil on-site and constructed this wall (still constructing) with mostly our bare hands (and feet to mix the ingredients together) and no power tools. This wall is super structurally strong and will get lime plaster and little roof to make it look nice and protect it from the Oregon rain. The best part is that is someone wants to re-use the cob 100 years from now all they have to do is re-wet it and it's good as new.
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