Thimble

Dann757 · Post by **Dann757** » Tue. Nov. 25, 2008 6:16 pm

Well I found an 8" thimble and worked it in. This is a nominal 12" long thimble, it cut down to 7" easily on my small tile wet saw. I buttered the flue with refractory cement, buttered the thimble and pushed it in place. The thimble is packed in with mortar. I didn't want to pack the heck out of the inner flue, I think the air space around it is good insulation against heat transfer to the block. Brace will stay in place for a day or two. This chimney is 60 yrs old, but wasn't used much at all until I came around. This set up is the max diameter I can use for sure, it matches the outlet of the stove so I think I'm in good shape.

Dallas · Post by **Dallas** » Tue. Nov. 25, 2008 7:14 pm

Air space is good, as the thimble will want to expand and would like somewhere to do it, so it doesn't have to crack.

coalkirk · Post by **coalkirk** » Tue. Nov. 25, 2008 7:16 pm

Nice job.

lincolnmania · Post by **lincolnmania** » Mon. Dec. 01, 2008 4:59 am

it looks good!
i just put one thru my wall for 6" pipe......beats going thru a piece of tin in an old window lol.......next yr I will put a block chimney to the thimble hopefully........we have 4 stoves, so 4 block chimneys is just not something I can afford to jump in to lol......tin pipe is cheap

Thimble

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