Newbie making a pizza oven.

[JRPizza]

Nice concept, I like the look of the paver arch. I think you will be best off building a standard pompeii oven (insulating board, firebrick, insulation) then building an enclosure using your block. For all the work you are going to be putting into an oven you might as well have one that is functional and durable.

[Bauffman]

I am trying to create a pizza oven out of retaining wall blocks so that it matches the retaining wall it is built into. I was wondering what I could use to line the patio block with instead of firebrick.