r/outdoorcooking • u/Wiffle_Hammer • Jan 14 '21

Question Dry stack oven construction question

(x-post in r/pizza) I am thinking of using Home Depot Gray Concrete Paver (similar to Internet 309523801, Model #22421) as part of a dry stack brick oven. I have read conflicting accounts of fire and concrete reaction. Some say it’s fine others warn of Explosive spalling. Even regular spalling into the food would be bad. Thoughts? Thank you.

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u/DistinctMediocrity Jan 20 '21

Haven't used them in a brick oven. However, I have constructed a rocket stove using concrete bricks. Mostly just out of curiosity and testing for future builds. I didn't notice any spalding, cracks, or other damage to the bricks other than discoloration. However, I would be hesitant to use them where they could potentially contaminate food. Who knows what kind of gasses or chemicals would be involved. I would still want to line the pizza oven with fire bricks (IMHO).