- Remove the kiln sections.
- Take the old bottom off the stand.
- Put the new bottom on the stand.
- Relevel the kiln.
- Replace the kiln sections.
- Make sure the stand is in good structural shape and is not corroded before reassembling the kiln.
NOTE: You may want to experiment with using the old bottom as a secondary back-up bottom if it is not too badly damaged. Some find that having this extra insulation thickness helps firing times and bottom uniformity.