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Old 08-24-2009, 07:52 PM   #1
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Chimney roof penitration size?


I'm getting ready to install a wood stove/heater. I'm using insulated metal chimney and will have to cut a hole in the roof. The roof is 1/2" particle board, tar paper, lathe and metal roofing. How much clearance around the insulated pipe does there need to be?

Thanks,
Will

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Old 08-24-2009, 07:57 PM   #2
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Chimney roof penitration size?


1) Read the chimney manufacturers specs for clearances

2) Contact your local building codes inspector and house insurance agent for their rules.

3) Get it inspected

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Old 08-24-2009, 08:15 PM   #3
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Chimney roof penitration size?


1. Specs are some what vauge, best I can tell after reading everything is 1 1/2" clearance.

2. There is no local building codes or inspectors this far out of town.

3. State farm doesn't care as long as I don't burn the house down.
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Old 08-24-2009, 08:18 PM   #4
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Chimney roof penitration size?


It can vary possibly by Mfg, what do their instructions indicate?
Who is the Mfg?
Mine stated 2" clearance
If you do burn down the house & haven't notified them it's possible depending upon the wording of the policy they could deny the claim

Around here the local fire Dept has to issue a permit & do the inspection for any type of heating stove installed
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Old 08-24-2009, 08:24 PM   #5
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Chimney roof penitration size?


It's from Metal-Fab inc. Going through the web and there scanty instructions it looks like 1 1/2" for the size pipe I'll be using. That said I'm planning on using 2" for peace of mind.

They've been notified, they were more concerned about the wood heater than the chimney, but since it's sitting on a concreate floor and will have rock walls around it it's good.

Thanks,
Will
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Old 08-24-2009, 09:00 PM   #6
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Chimney roof penitration size?


Yeah, the double wall works pretty good
Concrete & the walls will make a good heat sink
I'll be building a stone wall of some sort in the corner where mine will be set up
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Old 08-24-2009, 09:03 PM   #7
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Chimney roof penitration size?


Just IMHO if this is a wood burner use triple wall pipe. If you have ever seen a flue fire you'll wish you had.

Just my $.02
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Old 08-24-2009, 11:28 PM   #8
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Chimney roof penitration size?


Didn't know they made tripple walled pipe. What I'm using is ceramic insulated double walled. Not sure what rating is on the ceramic wool, but I use basicly the same thing in a gass forge at better than 2300 deg. F.

I have been thinking of wraping the opening in ceramic wool where it penitrates the ceiling. But the flashing is a high temp orange rubber boot.
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Old 08-24-2009, 11:30 PM   #9
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Chimney roof penitration size?


Here's a link to a place I found

http://www.ventingpipe.com/index.cfm...ategoryID=3939
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Old 08-24-2009, 11:32 PM   #10
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Chimney roof penitration size?


Forgot to mention, the roof penitration is aproxamatly 10' from the heater. Don't know if that's enough distance to cool is significantly or not.
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Old 08-24-2009, 11:35 PM   #11
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Chimney roof penitration size?


I think whether it's one foot or 100 feet you need to use the correct pipe. I agree with Scubadave check local codes and manf specs. With wood stove the wrong pipe can be a life or death situation
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Old 08-24-2009, 11:39 PM   #12
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Chimney roof penitration size?


Thank Plumber101, I'm looking at the site now. It looks pretty much like what I got. I guess I should have given the size of the heater before, but it's a pretty small wood heater.
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Old 08-24-2009, 11:43 PM   #13
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Chimney roof penitration size?


I agree with using the rite materials. Basicly the fireplace shop hooked me up with everything, I just want to make sure it's rite. Especialy dealing with fire, I don't want to take chances.
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Old 08-24-2009, 11:44 PM   #14
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Chimney roof penitration size?


With wood burners I'm always concerned with creosote build up. I have installed only one in my career and then I check with my insrance and I'm not covered for wood stoves. Not a big demand to justify premium increase. But, advise customers to have cleaned once a year and you know how that goes. Once that creosote starts man that's a hot fire in the pipe.

All I'm saying is to play it safe. You might save $2-300 on pipe for a double wall but what is life worth. Just my $.02
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Old 08-24-2009, 11:51 PM   #15
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Chimney roof penitration size?


I got you, I have thought about creosote, normaly don't have much problem with that down here using dry hard woods. Though I did plan on using a brush once a year for safety. Where it'll be exiting my roof it's a fairly simple mater to pop the cap off and run the brush down.

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