I want to build a pompeii style oven (I currently have an AS style that I built a few years ago). This will be a pizza only oven. I want it to heat quick and cook extremely well. Is it necessary for the hearth thickness to match the dome thickness? I want to use the FB pompeii plans. However, will 2" FB Board with a 2.5" thick firebrick hearth work well with a 4.5" thick dome covered in 2 or 3" of FB blanket? Or do I need to stand the bricks on edge to give a 4.5" hearth?
Re: Dome/Hearth ratio
Last edited by KINGRIUS; 10-07-2009 at 05:05 PM.
Re: Dome/Hearth ratio
I agree on the floor; lay the bricks flat. The 2 inches of insulation board is more than adequate. One area of deviation is the thickness of the dome. If just for pizza's then a 2.5 inch thick dome would work fine too. Note the geodesic design for example. The thinner design will heat up faster (significant?) but hold less heat for extended baking. I went with the 4.5 for more mass and dome stability. Note my opinion is to be taken without any expertise behind it. I built an oven. But, that is where it ends.
I ordered 2 boxes of insulation blanket and doubled up on my 36 inch dome. I liked that route as opposed to all the bags of vermiculite it would have required. I think the 2 boxes gave me about 5-6 inches over most of the dome. I ran it up the sides of the arch and chinmey also. Enclosing the oven versus an igloo finish will play a role though. I did the enclosure and wasn't too precise with fitting the blanket. The first layer is snug and the rest flopped on.
The 16 inch dome cooks pizza's very nicely. But, I would have to experiment with a taller dome to compare the behavior differences. So many variables come in to play when making what I consider the perfect pizza. That is the art aspect.
Enjoy your build.
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