hi mr stonecutter sorry i dont have ur name, i have one more question in case i want to make a precasted dome with 48 inch diameter can i use the same calculation of H = D/3.4 for the internal height , i got this calculation from the forum for low dome / or aggressive dome but that was for brick oven and can u give some insight on mould i got this pic from the internet and am thinking of replication it , is there a any other option and could you commet on the pictures also
is the mould made with thermocol
I don't see why you couldn't use that formula ( H=D/3.4) if that is what you want. As far as how it is applied to a specific material, it doesn't matter....brick or castable are both thermal mass, oven dimensions aren't based on what kind of material it is made from.
Other options besides brick and castable? Cob, clay earth, elephant crap....almost anything can be used to build an oven. What is used and how it is built is entirely up to the individuals ability, available material, budget,time......a multitude of reasons. There is no one size fits all answer to the question of what is the right or best oven, because everybody has different circumstances and goals.
Just select something that is manageable to build, material that is affordable and easy to find. You can always build another....in fact most people do.