What is meant by "cob"? Charlotte Logan October 10, 2019 15:38 Follow We don't mean the corn kind! 🌽 Cob is a building material that comprises subsoil, straw, water and occasionally lime. Related articles Can I claim for items not in my vault? What is the minimum age required to purchase your insurance? How do I amend my address? What is the maximum value of any single item that I can insure? When will I receive my £40 Amazon gift voucher? Comments 0 comments Article is closed for comments.