I may have made a big mistake on my oven. I've been reading about insulating the bottom of ovens and have seen many people say that sand is a horrible insulator. Well, I'm almost finished with my oven and I used sand under my fire brick floor. Now I'm freaking out because I'm going to be losing a lot of heat through the floor. My oven is 36 inch diameter with a dome height of 17 inches and a 18x12 opening. My floor is fire brick with half inch of sand and a 5 inch concrete slab. Am I going to lose a lot of heat? Will the concrete help keep the heat in? I plan on using the oven for making pizzas, bread, roasts and pretty much everything else.
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Question about oven floor insulation