Chicken Wire

The type of construction used here is called ferro-cementing. It is a combination of applying a special mix of concrete over a web-work of steel, to a thickness of 2" to 3," to create a very strong shell. Believe it or not, there is a tradition of constructing ship-hulls using ferro-cement, as it is very durable and the hulls stand-up to wave-action and oceanic stresses.

At this stage, you will take patches of hardware cloth (Heavy-duty chicken wire is fine for this) to wind and wrap around and over your re-bar dome-frame, wiring the material firmly to the frame at all locations. (Use steel wire; not copper for all of this. Where possible, use galvanized material.) It would be advisable to wire-in the hardware cloth from both the outside and the inside of the dome-frame. When you are finished, you will have density of meshing that will take and hold your ferro-cement plaster mix.