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FAQ/Answer

The firebricks in my kiln have gouges, or small holes, on the surface. The depth of the holes is 4 – 8 mm (1/3 inch). Is there anything wrong with the kiln?

Do not worry about the holes. A surface gouge with a 4-8 mm depth is minor for a firebrick. Firebricks can withstand tremendous stresses during firing. They expand and contract; they get red hot. Few other materials are put to such a severe test. Consequently they get surface scars and holes that are unavoidable.



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