I’m starting to build my Mattone Barile oven and I’m running into an issue figuring out how big the cooking surface should be. Looking at the size of the hearth (56" x 47"), if I use 8" bricks on the sides, the void of the cooking surface would come out to be 40" x 31".
However, looking at the instructions for casting the hearth, they call for making one foam board at 27" x 18.5" and two at 27" x 8.5". This would result in a void of 27" x 35.5".
Which size is correct for the cooking surface? I want to make sure I have everything correct before moving forward.