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Smoke from Chimney

By Tim Carter
©1993-2008 Tim Carter
Summary: Chimney smoke in a house is a sign something is wrong. Usually it means the fireplace does not have a proper combustion air intake vent.

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Comments

Eric
04 Jan 2008, 08:26
Tim,
I have smoke entering our home through the basement fireplace within minutes of starting a fire in the fireplace on the first floor directly above. I capped off the flue to the basement fireplace at the top of the chimney but still have smoke coming in to through the basement fireplace. Smoke does improve when I open a window. However, how can the smoke enter through the basement fireplace when it is capped? The chimney is about 30 years old. Brick seems to line the smoke shelf.
Thanks
AsktheBuilder
05 Jan 2008, 07:33
Eric,
It sounds like a combustion or makeup air issue. The first-floor fireplace is STARVED for air. Test this by starting a roaring fire and have a window in the room open at least 4 inches. Tell me what happens.......
Dan
07 Jan 2008, 10:27
I am using gas for heating. Since gas is suppose to burn cleaner, why am I getting black smoke out of my chimney that frequent? Is there something wrong with my furnace?
AsktheBuilder
07 Jan 2008, 10:53
Dan,

Yes! The burner is not adjusted correctly. Call a service person ASAP.
Dan
07 Jan 2008, 11:01
Thanks. What do you mean not adjusted? and what does the servicer need to do? is it a big job? Please excuse my ignorance, but i am completely clueless when it comes to furnce and boilers. Appreciate the help very much.

thanks
AsktheBuilder
07 Jan 2008, 11:47
Dan,
I can't say how tough it is as there are many variables. *Call* a service technician *now*.
Craig
14 Jan 2008, 14:01
Hi Tim,

I have a stone and brick wood burning fireplace, built around 1963. I had a roaring fire going and had smoke coming out of the wall, which I believe is the area that the stone changes to brick, between the living room and office. No smoke in the downstairs fireplace or furnace room, just coming out of the joint where the wall meets the fireplace. I put a carbon monoxide detector in the office and it didn't like what it found. I can't see and cracks (inside or out), recently had it cleaned. I'd like to use it again. Thanks
AsktheBuilder
14 Jan 2008, 14:13
Craig,
Don't use it. Smoke leaking through a crack is the worst fireplace jujumagumbo you can imagine. You need to have the crack repaired by a qualified mason.
Craig
14 Jan 2008, 14:52
Thanks Tim, I haven't used it since and want to get someone out to look at it but that creates another problem, who to turn to? I've asked around but nobody knows anybody. I don't mind paying, but want a good job done right. Aside from interviewing out of the yellow pages, who can I turn to? You mention a good mason??
AsktheBuilder
14 Jan 2008, 15:41
Craig,
The answer was right here on the website. You need to be a little patient and browse around.....

http://www.askthebuilder.com/404_Hunting_For_A_Professional.shtml
Laura
27 Jan 2008, 18:52
We have a 1977 home with a masonry fireplace. The opening is huge compared to most. We do not see smoke, but the smell is always strong and throughout that end of the house. Is this normal? Also, are the creosote removing logs that you burn useless? Thanks for your wonderful website!
AsktheBuilder
28 Jan 2008, 10:24
Laura,
Read all of my Fireplace Columns. There is a particular one that has a sizing table in it. See if the shape and size of your firebox is correct. As for those magic logs, there is no substitute for a chimney sweep with the right brushes!
phil
29 Jan 2008, 15:11
I have a new home (7 months old) I had my first fire in the fireplace with no issues, the next night I had a fire and had no issues until the fire had burned down to coals, then the smoke produced by the coals started filling the living room. What would be causing this, and yes I had the damper open.
T
30 Jan 2008, 13:11
My house was built in the 40's and have 2 fireplaces one in the living room and one directly below it in the basement. it has one brick chimney with two flues. When I have a fire in the basement I can smell and see smoke in my living room fireplace. What could be causing this. I had one guy tell me it would cost $8000 to fix!!!!!! but probably had this problem since it was built, as far as my hot water tank it has a seperate chimney in the center of the house and my furnace is new with the pvc pipe run out the wall. I have installed new windows, but I also installed the Lock-top dampers on top of my fireplace flues so I don't think it's a down draft of the flue I only burn once in a while so i'm not gonna spend alot of money on this. Any suggestion
AsktheBuilder
30 Jan 2008, 13:29
T,
Go read my past column on Makeup Air now. I think the issue is on of Combustion Air Starvation. Do an experiment. Start a fire in the basement fireplace, but open fairly widely a door or a window as CLOSE as possible to that fireplace. Tell me if you see smoke inside.
Pete
30 Apr 2008, 13:37
I have a similar problem (smoky smell in the basement after starting a fire in the upstairs, twin flues in one chimney); would installing a fireplace insert in the first floor and/or basement fireplaces solve the problem as well?

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