No, it's not critical. You can make an oven entirely out of mud / cob if you wanted without using any firebricks. The primary reason bricks are ideal for the base is because they are clean and will give a nice crisp cook to the bottom of the pizza. Firebricks are preferred over regular bricks because they can handle higher heats and wont crack. Similarly with the inside of the dome it's preferable to use fire bricks as they'll last longer with the high temperatures. For the outside of the oven you can use regular bricks or cob because it wont be exposed to the high heats inside the oven.
Hi, newbee "mason" here. I have castable high temp mortar that I tried to use to butter between the ...
The thicker the walls of a wood fired pizza oven the greater the thermal mass the oven wil...
What is the best type of bristle brush to clean the brick hearth in my Wood Fired Oven?
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Round pizza oven hearthIn a wood fired pizza oven the hearth is the section upon which the...
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