The Fire Brick D130 Instruction Booklet page 24

24
2. Laying the Floor Tiles
2E: GRIND HIGH EDGES
If there are any raised edges at joints between the tiles, these can be ground back using an angle grinder with
a masonry grinding disc or sanding disc. Do this before you build the dome, while you have easy access. Don't
grind the tiles unless you absolutely have to! Only grind the high spots that you might catch your oven tools
on. Refer to the video instructions for more detail.