Cracked chimney pot

23 Mar 2006
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United Kingdom
I have a multi fuel stove with boiler fitted in my living room. The chimney stack has no liner and is of a straight vertical construction. My problem is that my terracotta chimney pots keep cracking, the last one ended up coming through the roof in high winds, I have since had a new pot fitted which I have just noticed is cracked again. Any ideas what may be causing this guys?
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Only guessing, but the pot doesn't like getting wet and then getting very hot.....maybe a glazed one is for you?
John :)

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