Broken flue? How to fix?

Broken flue? How to fix?

PostBy: daluds On: Fri Sep 18, 2009 10:09 pm

Hello,

Does anyone know how to fix a broken flue? I noticed it while cleaning out the stove pipe and flue insert. Here are some pictures.

Thanks,

Dave
Attachments
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View inside horizontal part from the boiler
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index003.jpg
Right side view of vertical flue
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index006.jpg
Left side view of vertical flue
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Last edited by Richard S. on Sat Sep 19, 2009 5:52 am, edited 1 time in total.
Reason: Moved to Venting, Plumbing, Chimneys, Controls, Coal Bins
daluds
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Re: Broken flue? How to fix?

PostBy: Freddy On: Sat Sep 19, 2009 5:50 am

It's hard to tell from the pics. Is everything we're looking at stone, brick, etc, or is some of it metal? If it's stove, pieces of firebrick and furnace cemant should fix it. If it's metal it needs to be welded.
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: Broken flue? How to fix?

PostBy: lowfog01 On: Sat Sep 19, 2009 6:48 am

daluds wrote:Hello,

Does anyone know how to fix a broken flue? I noticed it while cleaning out the stove pipe and flue insert. Here are some pictures.

Thanks,

Dave


Hi Dave,

Do you have any idea how this happened? The pictures look strange to me because the edge is straight and if it had broken I think the edge would be more ragged. If I didn't know when or how it happened I would be concerned that maybe there are other spots you can't see or access that are "broken" too. That happened to my neighbors. It was discovered that the flue had been installed incorrectly along the entire length of the chimney and to fix the problem they had to put an insert down the chimney. Without the insert they had a very real chance for a fire. I think I'd get a chimney guy in to check it out before I tried to fix it. I maybe being overly cautious but hey, why take a chance. Lisa
lowfog01
 
Hand Fed Coal Stove: Mark II & Mark I


Re: Broken flue? How to fix?

PostBy: daluds On: Sat Sep 19, 2009 7:56 am

Fred,

Its made out of ceramic/clay flue blocks and around it is the chimney brick on the left side and cement on the right side. There is a fireplace above to the right.

Thanks,

Dave
daluds
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Re: Broken flue? How to fix?

PostBy: CapeCoaler On: Sat Sep 19, 2009 9:08 am

Looks like a mismatch from when the chimney was built...
Round flue into a smaller square/rectangular flue tile...
If you are just burning coal some furnace cement to patch it up...
Wood is a different story with the creosote build up.
CapeCoaler
 
Stoker Coal Boiler: want AA130
Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
Coal Size/Type: Pea/Nut/Stove

Re: Broken flue? How to fix?

PostBy: daluds On: Sat Sep 19, 2009 8:01 pm

I bought some furnace cement. I thought about using metal stucco mesh as a form for the cement, but not sure this will expand/contract with temperature changes causing the cement to crack. Any thoughts?

Dave
daluds
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Re: Broken flue? How to fix?

PostBy: CapeCoaler On: Sat Sep 19, 2009 9:04 pm

Furnace cement strong...
I would not embed any metal...
As it will rust/corrode
CapeCoaler
 
Stoker Coal Boiler: want AA130
Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
Coal Size/Type: Pea/Nut/Stove

Re: Broken flue? How to fix?

PostBy: daluds On: Sun Sep 20, 2009 9:49 pm

I patched it up with some furnace cement, and did use the stucco mesh to make a form for the cement. I'll check it in a few weeks to make sure its still in tack. The opening is much bigger now than it was originally so maybe the draft will be better.

Thanks for all the replies!
daluds
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Re: Broken flue? How to fix?

PostBy: Freddy On: Mon Sep 21, 2009 5:24 am

I think you'll be fine. Glad you got it repaired.
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: Broken flue? How to fix?

PostBy: daluds On: Mon Sep 21, 2009 10:27 am

From the 2nd picture I posted, the flue insert stops on a ledge. Below is the clean out, but I noticed it is also open to the area around the flue insert up the chimney and presumably to the adjacent cleanout for the fireplace. What prevents air from going out these other paths? Does this affect the draft?

Thanks.
daluds
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520