Q: You recommend 9" x 4.5" x 2.5" firebrick, but I can only get 9" x 4.5" x 2.25"… Will that still work?
A: Yes. If you can’t get your hands on the 2.5" firebrick, 2.25" firebrick will be just fine… but your mortar joints will be slightly larger. If you would like to see two awesome ovens that used the 2.25" firebrick, jump back to the Photo Gallery and check out the LEWIS OVEN and NATALE OVEN.
If your firebrick are any other size, it will most likely work -
The firebrick WIDTH should be 2.25 - 2.5".
The firebrick HEIGHT should be 3.75" - 4.5".
The firebrick LENGTH should be 7.5" - 9". Make sure you layout the firebricks along the foam form before cutting. This will allow you to visually see how you should cut the edge firebrick to size.