Here’s the 14 sided cobin I built on Maui 3 years ago. It’s doing great, which is no surprise, as they all are 👍 it has a lime plaster and lime wash on the outside and an earthen plaster on the inside. This is 200 sq ft 16 ft across which is the legal limit you can build here in Hawaii without a permit. Hope this helps to inspire you to build your own Palletable Cobin! I’m here to help! 😎