Max
Good morning. Plans look great. Thank you. Some questions.
-what type/brand of mortar do you recommend?
-any plans/directions for the arch/opening. This seems to be the most daunting part.
-Is there a key for the abbreviations on the geometry calculator?
-I’m not sure i understand options A and B on the dome ring diagram
-any plans for the throat/chimney
-any plans for the outer arch
-any plans for the harness
Thanks!
Mike
In general, I use commercially made refractory mortars for this technical kind of dome. It gives good grip, is not too gritty, and is really strong after it sets. Sairset by Harbison Walker is good. I have also used its equivalent made by High Temp Portland. Most any refractory supplier, including Alsey out East will have its house brand of refractory mortar. It is important to know that these refractory mortars have sodium silicate in them and therefore are prone to efflorescing if left wet for too long. This can happen during installation or later.
So, if you are not detailing your oven enclosure to keep the oven dry, you may want to use HeatStop which is calcium aluminate based. I find it harder to work with, more like a cement than a clay, but I believe it holds up better for wet places including outdoor fireplaces.
Allowing an oven to get wet is a bad idea though because the amount of energy (wood) it takes to fully dry it out before it starts heating up is very signficant.
Ok, first question done! 
More soon!
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