Stilts for home needed

[Maggie]

Assuming there's lava just a few inches under the soil yes?

Jackhammer some nice 2' deep holes into the rock, and fill with concrete and non-rusting rebar (Gatorbar, Honsador Lumber carries it). Then use Sonotube and more gatorbar to do 8-10" columns to whatever height you want. That will support anything you want to put on top of it, and will be termite, fire, rot, and rustproof.

Now that is what I needed to know!!! Thank you for the simple explanation with enough detail as well as where to get the gatorbar. Can you tell me if I can use bags of concrete that I mix on the spot or does it need to be done with a cement truck so that there is no weak areas? Mahalo : )