Why we should all know how to build with cob?

6 things that will blow your mind about Cob Cob /käb/ (n.)  A natural building material made typically from onsite subsoil, water, fibrous and organic material (typically straw), and sometimes lime. The contents of subsoil naturally vary, and if mixture does not contain the right ratios it can be modified with sand or clay. The oldest cob house still standing […]