Glossy black creosote

Crabbypatty · Feb 8, 2009

is this normal? i checked on the chimney while i was shoveling some snow off my roof and the last 6 or 8 feet seem to have a gloosy black ceosote formed, it looks like someone sprayed a can of rustoleum high gloss paint inside the flue! its not thick at all, just a glaze, it is the cold part of the chimney, attic and above the roof.

begreen · Feb 8, 2009

That sounds like a description of stage 3 creosote. It is the kind you don't want to see in a flue.

https://www.hearth.com/econtent/index.php/articles/creosote_from_wood_burning_causes_and_solutions
http://www.chimneysweeponline.com/hoglaze.htm

Backwoods Savage · Feb 8, 2009

Nasty stuff.

mainstation · Feb 8, 2009

So it sounds like height of chimney also is a contributing factor. My insert when installed will have a stainless flex liner the entire length, but my chimney is over 30 feet high. Should I be concerned.
My last wood insert chimney, same flex was only like 16-18' up.

Q- Can height concerns be handled with the same wood burning/good dry wood/ advice.?

good links.

begreen · Feb 8, 2009

Dry wood in a modern EPA stove, interior chimney is usually the best prevention for creosote buildup. Depending on the stove, you might want to consider downsizing the liner slightly to 5.5"? What is the make/model?

mainstation · Feb 8, 2009

The stove is to be a Regency R14, manufactured 1991/2 or so. The chimney to be lined is a ceramic rectangular flue , stone chimney, in an area where a West wind is prevailing.
Is a Selkirk SS flew liner adequate or....?

rfalk · Feb 9, 2009

mainstation said:
So it sounds like height of chimney also is a contributing factor. My insert when installed will have a stainless flex liner the entire length, but my chimney is over 30 feet high. Should I be concerned.
My last wood insert chimney, same flex was only like 16-18' up.

Q- Can height concerns be handled with the same wood burning/good dry wood/ advice.?

good links.

I also have a tall chimney (35') and I notice a shiny black coating on the top of my clay chimney pots (this is my first year and i haven't inspected yet (too high!)). Have burned about 2-3 cords (mc ~15-20%) of hardwood.....I suspect I have the nasty hard to remove creosote......my chimney is insulated for 33 of the 35' feet. So, what do we do?

Crabbypatty · Feb 9, 2009

i am gonna try a nice hot fire to see if it has any effect on the glaze. i threw a couple of small rounds on last nite to get rid of them, and they were pretty green, i don't know if that contributed to the glaze....

begreen · Feb 9, 2009

mainstation said:
The stove is to be a Regency R14, manufactured 1991/2 or so. The chimney to be lined is a ceramic rectangular flue , stone chimney, in an area where a West wind is prevailing.
Is a Selkirk SS flew liner adequate or....?

Can you start a new thread so that your question gets full attention from a larger audience. It's likely to get lost in the creosote thread. I'm not a liner expert but Selkirk and Simpson are major brands. There are some others as well. Is this an interior or exterior flue? What is the interior dimension of the tiles?

begreen · Feb 9, 2009

Crabbypatty said:
i am gonna try a nice hot fire to see if it has any effect on the glaze. i threw a couple of small rounds on last nite to get rid of them, and they were pretty green, i don't know if that contributed to the glaze....

Putting unseasoned wood in the fire is a contribution to the chimney-fire burn bank. Not a good plan of action.

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Glossy black creosote

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