I see all these exercise ball dome builds using a perlite/vermiculite layer
Wouldn't it be better to have a non insulating inner layer?
And how about regular used red ceramic brick with no fire brick?
Is spalling ever an issue.?
Thank everyone. I'm all excited about this. I used to work at Pizza Hut and never got tired of pizza. Now I'm working outside Chicago and am getting some Lou Malnati's Deep Dish.
It will never get hot enough with a non insulating layer.