This past weekend I was up in the attic getting ready to lay down some
insulation when I noticed that there was a pretty big gap between the
chimney and the adjoining wall running pretty much the whole lenght of
the chimney. I wasn't able to get close enough to measure it, but I'd
say it's close to an inch pretty much the whole way.
Is this something I can seal with a can of the spray foam sealant or do
I need something else?
That's supposed to be there. It keeps the chimney away things that
burn, so that your chimney fire doesn't cook off the rest of the
house. I don't think you should seal it at all, but if you do,
use something that's both non-flamable, and which doesn't conduct
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