I was just sitting her thinking about the different materials involved in making an
RMH. Then I was thinking about the discussion about using metal for the exhaust. Is this necessary? Does it need to be metal?
Why not just use
cob?
Is there a structural reason? Safety? Is there a risk that the whole thing might collapse one day and spew fire?
How about using something like Sonotubes (
cardboard tubes for doing fencing, deck foundations, etc) to make the form. Cover the whole thing with good cob or a suitable alternative. Light it and let her burn. The paper tube would of
course burn, but would not the cob cure and harden creating a permanent exhaust?
Of course this makes me think of the saying "curiosity killed the cat". Am I the cat?
