Referring to the front bricks from step E in the “Closing off the Front” part of the guide. I have regular red brick for this purpose. The guide just says mortar, but I assumed from the proximity to the heat it would be better to mix more of the high heat. That also means opening another bag of silica sand though.
The rest of the oven will be covered in tile. Haven’t decided if I’ll cover these new bricks as well.
Almost done! Trying to figure out the bottom as well.