...The adobe house is built by layering the mud one layer at a time...
This works to greatest effect on a free-standing wall surrounding a yard or a city because termites have little incentive to tunnel through this structure. But when used to build a house one needs a roof, and that's where it gets complicate. Whether the roof is straw or adobe the wooden support structure is a termite attraction.
So about treating the wood against termites; we have an abundance of used motor oil in this country. Do you know of any long-term results from treating lumber with recycled motor oil?
I do like the idea of a vaulted adobe ceiling. Perhaps on a wall of compressed earth block. I have yet to find out if termites can get through compressed earth. Thanks for your thoughts!