Hello From NZ

[wemme]

Hello, Just looking for some words of wisdom from the more practiced in pizza oven building.

I want to build a 36" High Vault Oven in the garden. unfortunately fire bricks are ridiculously expensive here where castables are mostly reasonable.

I plan to using Castable for the Themal mass is 50mm (2") enough???
I only want to do a few pizzas a loaf of bread or two or a roast or so.
I don't plan on being the local baker!

for the insulation Layers I want to use a Perlite and portland cement mix.
I plan on 100mm (4") for the base and then 200mm (8") for the walls is this too much or about right???

I have seen mention not to use a concrete mixer for vimiculite cement mix but with no reason i assume this is so the vimiculite doesn't break up ??

I am looking at a 100mm concrete foundation slab with 12mm(1/2") rebarb and reinforcing mesh for reinforcing. I assume this would be adequate?

And if any Other Kiwis around here feel free to say hi and share notes.

Thanks for any answers they will be much appreciated.

Regards
Bart