Thimble clearance in a log home...

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Exmasonite

Feeling the Heat
Hearth Supporter
Oct 3, 2010
321
Novi, MI
Hey everybody-

Saw a few recent threads on thimbles and that got this novice thinking about his own setup. Very quick backstory:

Purchased house in the fall, had an old (but still EPA) wood burning stove. Have since discovered that if there was a corner to cut, the previous owners probably cut it twice. Flue exits horizontally through wall into tile-lined masonry chimney.

So, here's a pic of my set up (from another thread... can get additional pics if people need them)

[Hearth.com] Thimble clearance in a log home...



As you can see, the thimble goes directly through the logs. There is no 12" brick clearance. Is that a problem? While wood is inherently flammable, does the "solid" nature of the wall and inability to get a good air source within the wall preclude the need for such an offset? There's a 1" air gap around the pipe as it transits the wall (metal tube within metal tube for lack of a better term).

Home inspector, appraisal, and insurance inspector didn't raise an eyebrow about it... town hall has a permit for the stove installation back in mid 90's, paperwork all checks out (but if the town inspector was the same guy back then as now, that doesn't mean much unfortunately)

Thanks. Will try to get some pics of the actual thimble... just cut/paste this one to get the thread started.
 
It may not be the most kosher installation, but I would hope that they ran class A through the logs. If so, it should have minimum 2" clearance surrounding it. Hard to say if this is so with the trim ring cover. We will need more info, pics, measurements and an outside view to tell. Is the connector single wall pipe? If so, what is its closest distance to combustibles?
 
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