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Thread: Weird Flue Build Up
06-07-2010, 02:53 PM #1
Weird Flue Build Up
The flue was covered with what looks like hard roofing tar. There were also little balls of it on the rain cap. Is this evidence of a chimney fire, or something else? It was a Lopi wood burning insert into a masonry fireplace and chimney.
Similar Threads:Jim Robinson
New Mexico, USA
06-07-2010, 03:21 PM #2
Re: Weird Flue Build Up
I'm no chimney expert, but it looks like a nice build-up of creosote to me, and rather than evidence of a fire, is more likely going to lead to a chimney fire unless cleaned.
"There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
06-07-2010, 06:08 PM #3
Third degree glaze creosote. There may be some pyrolyzed creosote from a chimney fire down in there but I can't see it from here.
Should have been installed with a listed stainless steel insulated liner. You can try several methods to get some of this stuff out but they each have risks and are not 100%. Better to bust out these flue times and reline.
This is probably a "slammer" insert. If it has a direct connection to the first flue tile, it might have been acceptable prior to 2003 but now this flue would be oversized if the stove has a 6" collar.
Level II inspection and reline.
Keep the fire in the fireplace.