Holy crap. I knew taking cob apart was not easy, but to actually try to destroy cob makes it really clear just how strong this stuff is! This is a brief video of me (attempting to) demolish the cob bench outside of my house. This bench no longer fits into the design since I plan to add a small mud room/airlock to the house, and the bench would be in the way.
I tried a sledgehammer, but it wasn’t as effective as a pick axe. Actually, it was easiest when the bench was soaked with water and then struck with the pick axe. Hitting it wet with the sledgehammer resulted in cob flying everywhere.
Cob is stupidly strong. You can see the minimal impact a full pick axe blow has on the bench. What made it somewhat reasonable was prying the urbanite out from underneath the bench, and then really wailing on the cob to break it up.
This cob bench demolition experience is making me sweat when I think about taking the whole cob bed and bench apart inside the house! Good lord… it’s gonna be backbreaking…