The BlazeKing is cruising on "2" and I measured the flue temperature right above the stove collar at 289 and 115 at the ceiling collar (6' higher). Seems like a lot of temperature drop in that single wall pipe. Could this be my problem?
Discolored Metal Roofing
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This is why Blaze King recommends double-wall pipe. You are getting the efficiency from the stove. The stove pipe should not be used to scavenge the last iota of heat with these stoves.
Why are these installers not installing according to BK's specs? Seems to cause problems of one sort of another in some cases and it could probably be avoided.
Looks like rust to me. Once the metal is cut, especially steel, it will rust, especially under the silicone.
It drives me crazy how little most of these "professionals" know about the products they sell. They didn't even know what a BlazeKing was even though they were listed as an authorized reseller on the BlazeKing site. Store manager had to call headquarters to find out that they even sold the BlazeKing line. When their installer showed up with the stove I quickly read through the installation manual and saw BlazeKing's recommendation that all stove pipe be insulated. I pointed this out to the installer but was told that such a short run of single wall wouldn't make any difference in performance.
Next, the "professional" foam insulation company sprays foam directly on the stove pipe in the attic. I questioned him and was told it was perfectly fine. Only later do I find out that there should be at least 3" of clearance between insulated pipe and foam.
Just examples of the customer paying for the seller's/installer's ignorance.
I really like this BK stove, I just need to fix all the issues caused by the "professionals".
Matt Ruggeri
New Member
Rust. My friend has that same roof on his building, and it was installed poorly. I'll help him change out the gasketed screws every now and then, we can always find the ones that leak by following the rust trail running down the roof. Every now and then we'll have a new screw that leaks, Can usually find it because it will have the rust trail after one rain.
Whoever installed your Chimney without flashing and weatherproofing it should be smacked around with that Dektite when you get it! And the excuse of "they'll always leak" is either laziness, or lack of skills.
Whoever installed your Chimney without flashing and weatherproofing it should be smacked around with that Dektite when you get it! And the excuse of "they'll always leak" is either laziness, or lack of skills.
I would still like it if you could post a close up (clear) picture of that roof penetration area and the "rust".
It's covered with ice and snow at the moment
I did have some slightly discolored icicles hanging from the cap this morning (we had freezing rain and snow last night) so I ran the stove on high to take the stove pipe temps up. Seems to have cleared the ice.
mark cline
Minister of Fire
Rust won't discolor icicles , you are not burning hot enough . Even seasoned wood (20 % moisture or less ) will still cause creosote at low temps . Surface temp of your black pipe should be minimum of 250F.
I'm burning Hedge so burning hot is not the challenge. The flue temperatures at the collar are hot but they quickly cool in the single wall pipe when measured just before the ceiling collar. Anyone know how much difference I should see if I replace the single wall with double wall?
mark cline
Minister of Fire
OK, If your burning hot enough , then you need that heat all the way up the pipe . Where ever it cools , you will get creosote condensing on the pipe and it will drip.
I understand you are going to fix the storm collar issue yourself, but I would still go in and complain about it and demand double pipe at their expense.
You may not want to hear this, but even if you are burning proper wood and have those other issues fixed a light colored roof is a bad choice for a wood burner. The flue cap is always going to catch any un burnt material in small quantities and it gets deflected down onto the roof. In my opinion you can minimize it, but there will always be some residue seen on that white roof. I have to ask, did you pick a white roof, or was it there when you bought the house? I don't see many white steel roofs at all.
You may not want to hear this, but even if you are burning proper wood and have those other issues fixed a light colored roof is a bad choice for a wood burner. The flue cap is always going to catch any un burnt material in small quantities and it gets deflected down onto the roof. In my opinion you can minimize it, but there will always be some residue seen on that white roof. I have to ask, did you pick a white roof, or was it there when you bought the house? I don't see many white steel roofs at all.
The discoloration is creosote, not rust. Note that is extends even onto the panel section where there is no cut. Someone just posted a more dramatic example of how this gets on the roof and looks.
https://www.hearth.com/talk/threads/my-chimney-took-a-crap.120353/
https://www.hearth.com/talk/threads/my-chimney-took-a-crap.120353/
![[Hearth.com] Discolored Metal Roofing](https://www.hearth.com/talk/data/attachments/121/121505-db555fb03ed822fcd107beace1cc9d71.jpg?hash=PX17JPVfO9 "[Hearth.com] Discolored Metal Roofing")
That creosote is corrosive, if he doesn't clean that up and do something to prevent it from continuing to happen, it will end up corroding the metal surface and "rusting".
Good eye BG.
Well that brings us back to the wood maybe, or just normal condensation and dripping for winter time.
I don't have locust, but am thinking it takes longer than a year to dry.
Someone can correct me if I am wrong?
Well that brings us back to the wood maybe, or just normal condensation and dripping for winter time.
I don't have locust, but am thinking it takes longer than a year to dry.
Someone can correct me if I am wrong?
So...where to start considering the wood is not the issue?
1. Replace first 6' single wall with double wall?
2. Extend exterior pipe a couple of feet higher above the roof ridge?
3. Could a different rain cap help at all?
1. Replace first 6' single wall with double wall?
2. Extend exterior pipe a couple of feet higher above the roof ridge?
3. Could a different rain cap help at all?
Phoenix Hatchling
Minister of Fire
Damn!, I knew I should have used my calculator.
Oh well, I never was very good at math. 
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It might just be condensation which is dripping off the cap to the roof. Nothing you can really do about that.
White roof while good for reflecting sun & heat, is not the best choice of color.
White anything on a house, never stays white.
The flashing is your main issue, or lack thereof actually.
I don't think there will be a simple solution to the stained roof.
White roof while good for reflecting sun & heat, is not the best choice of color.
White anything on a house, never stays white.
The flashing is your main issue, or lack thereof actually.
I don't think there will be a simple solution to the stained roof.
In a few years a white roof would be green on the north side of the house out here. Moss grows in the darndest locations.
jhambley, I would start with changing out to double-wall pipe to fall better inline with the mfg. recommendations.
jhambley, I would start with changing out to double-wall pipe to fall better inline with the mfg. recommendations.
Actually, one of the nice things about painted metal roofs is you can wash it off easily. Providing you get to it before it corrodes the paint too much.
Honestly, I was thinking it may have bee just that . . . condensation dripping from the cap since it seems like it is just a bit discolored.
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