Chapter Six
TROUBLESHOOTING
Experienced potters should be familiar with what causes cracks and how to prevent them. Trial and error will
help you to understand the causes of cracking and how to remedy the situation. Remember, every clay is
different, and weather conditions vary. Only through experience will you be able to achieve maximum
efficiency from the kiln.
Below are some of the most common problems and possible solutions.
PROBLEM
POSSIBLE CAUSES
POSSIBLE SOLUTION
The kiln is
difficult to light
Wind in opposite direction
of the flames
Light the fire from the direction of the wind
Wood is not dry enough
All fireboxes were lit at
the same time
Use dry wood
Light the two fireboxes later
Flames come out
of the firebox door
Too little ventilation
Wind in opposite direction
of the flame
Make more holes in the dome
Light the fire in the direction of the wind
Too much smoke
in the fireboxes
Underfiring
Wet wood
Use dry wood
Too little ventilation
Too little fuelwood
Too little draught especially
to the dome top and at the
wall or dome joints
Make more holes in the dome to draw out the smoke
Use more fuelwood
Make more holes in the dome
Wet wood
Use dry wood
Stoves overfired Firing at too high temperature Reduce amount of fuel used
Stoves crack
During firing
Damp liners
Damp kiln
Dry liners before firing
Ensure that the kiln floor is above ground level and
is provided with a damp-proof layer
Shelter the kiln
Clay is not properly
Prepared
Allow clay to mature for several weeks before use
Clay is too pure
Add sand to the clay
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