I ve seen various ideas re insulating the dome and then protecting it from the elements. I was not planning a roof structure. 4-6 inches of vermiculite concrete over the dome as per the hearth How do you keep this from slumping to the bottom? Someone had suggested tinfoil in there somewhere. Then wire mesh and waterproof stucco. Rock on top of this to blend into the Canadian shield. Does this sound acceptable. Worried about collecting excessive moisture in the dome but i presume the stucco is the answer. thanks. fudugazi on Lake of the Woods How to post pics?