There's another article that discusses a material-efficient way of making domes arches and vaulted ceilings: https://solar.lowtechmagazine.com/2008/11/tiles-vau

There's another article that discusses a material-efficient way of making domes arches and vaulted ceilings: https://solar.lowtechmagazine.com/2008/11/tiles-vaults.html https://solar.lowtechmagazine.com/2008/11/tiles-vaults.html I've been watching videos of the technique. It's almost as relaxing as watching a professional butcher dismantle a cow.