Finishing Pizzaoven (DIY)

Dear all,

Currently I am working on a pizzaoven in my backyard and until now everything is going perfectly smooth:

  1. I built my pizzaoven table including insulation
  2. Got my pizzaoven floor in the shape of the dome
  3. Got the dome build with 5:1 ratio vermiculite Portland cement

I need your help with/opinion on step 4 and 5

I am planning to insulate my dome with glasswool insulation and keep it all together with chickenwire. Subsequently I want to finish the oven by adding a smooth last layer of concrete OR vermiculite and Portland cement OR plaster.

Do you have any advices on this last layer over the chicken wire and insulation?

As I live in the Netherlands (have rains) I want to make it waterproof as well.

I hope you guys can give me perfect advice.

Regards Jeap