Garage Stove pipe installation

[Frankie]

Guys,

I think I have this all figured correctly but since I am installing a wood stove in my garage for heat, the OCD in me needs to triple check my installation. For those of you with a wood stove, maybe you can help put my mind at ease.

My question is about the attic insulation shield for my class A chimney pipe. I have about 3 feet of chimney pipe in an attic space with blown in insulation. The insulation is no deeper than the 2x4 ceiling joists. Because the height is only 3 ft., I decided to simply box in the chimney pipe with plywood, observing the 2" minimum spacing to combustibles.

I have read and seen video stating that this is an appropriate way to protect the class A pipe from insulation in the attic. However, I keep having visions of the box heating up with trapped air.....I can't imagine how that could cause a fire but is there any reason for concern in boxing in 3ft. of chimney pipe? Should I drill air vents into the box, cover with mesh, to allow air circulation? Take it down and replace with a metal insulation shield?

Probably way overthinking this but I thought I'd ask.

Thank you!!

P.s. - The original chimney pipe in the garage (I'm just replacing what was there) had no insulation shield at all.

 

[PCustoms]

I'd make it out of sheetmetal.

Or buy one, wasn't that expensive IIRC.

 

[Jackfre]

Pyralysis is the reduction in kindling temp due to repeated high temp heating. The more you heat that wood the more likely it is to, some time in the future to give you some bad news. Use the factory attic insulation shield. They sell and support their pipe based upon "system" installation. You don't say which manuf you are using but I would strongly suggest that you use all the factory components. Perhaps your insurance company does't know or care that you have a wood stove in a garage, but they damned sure will if anything goes wrong and that stove is the first place they will look. I represented both Selkirk and Dura-vent over a 20 yr period in a 6 state area and I have seen this before.

 

[Frankie]

Pyralysis is the reduction in kindling temp due to repeated high temp heating. The more you heat that wood the more likely it is to, some time in the future to give you some bad news. Use the factory attic insulation shield. They sell and support their pipe based upon "system" installation. You don't say which manuf you are using but I would strongly suggest that you use all the factory components. Perhaps your insurance company does't know or care that you have a wood stove in a garage, but they damned sure will if anything goes wrong and that stove is the first place they will look. I represented both Selkirk and Dura-vent over a 20 yr period in a 6 state area and I have seen this before.

The brand I am using is Selkirk brand, bought from Northline express. Here is the video from their website talking about boxing in the chimney pipe in the attic space:

 

[Frankie]

Also from their website:

https://www.northlineexpress.com/media/pdf/5se-6t-ais installation.pdf

Appears to indicate boxing in the chimney pipe is an OK alternative to the insulation shield, though it mostly reserves that type of installation for when there is not enough room to easily install their metal attic shield....

 

[Shop Specialties]

A cheap easy way of doing it would be to use a piece of single wall pipe over the class A. You want it to be 4" larger than the OD of the class A. Cut 3 strips 2" long evenly spaced on top/bottom of the single wall. Bend those strips inward then slide the single wall over the class A. Once it is all put together it is not going anywhere and the 2" air gap will always be maintained.

 

[Frankie]

A cheap easy way of doing it would be to use a piece of single wall pipe over the class A. You want it to be 4" larger than the OD of the class A. Cut 3 strips 2" long evenly spaced on top/bottom of the single wall. Bend those strips inward then slide the single wall over the class A. Once it is all put together it is not going anywhere and the 2" air gap will always be maintained.

Appreciate the response. Yup I've seen that solution, which would work great....It's more that I don't really want to replace what I've already installed if it is perfectly fine....

Boxing it in with plywood seems to meet the requirements per the instructions from Selkirk. I'm just being paranoid....probably creating way more mental work than a $60 attic insulation shield is worth!

 

[nadogail]

IMHO, be sure your fire insurance policy covers you for heating your garage with a woood burning stove.

 

[TTTTTT]

I've used Selkirk pipe on a few chimney s and encased in a framed and plywood covering . Interior and exterior, here there called "chimney chase" Not sure if the spelling is right. On insulated pipe, as long as you have the 2" clearance you're fine. I put 2 in, on in my garage and one in the loft above. In Ontario, my insurance had absolutely no problem with it. I had them both WETT certified so they met all requirements. My insurance didn't even want them for their files, but should a claim be necessary, wanted them done. Cost about $250 each, but they were very thorough and comprehensive. Not sure if you have that system where you are. Sold a house last year with a wood stove, the buyers requested one on closing. No issues.

Sent from my ASUS_Z01HD using Tapatalk

 

[That1Guy]

I'd make it out of sheetmetal.

Or buy one, wasn't that expensive IIRC.

I agree. Sheet metal is easy to work with and would be my first, and only, choice.

IMHO, be sure your fire insurance policy covers you for heating your garage with a wood burning stove.

ABSOLUTELY!! A coworker had a housefire and his beautiful old farmhouse was a total loss . The cause was an electrical fire in the downstairs utility room within a wall. But because he had a wood burning stove in the living room, the insurance company gave him NOTHING! They said his policy specifically prohibited wood burning stoves. It was mid July so obviously, the stove had nothing to do with the fire but they still refused his claim. I couldn't believe it!

After hearing this, I called our agent and, sure enough, my policy did NOT cover the wood burning stove I had in my garage. I had to have them come out and inspect the stove and then get a special "rider" added to my policy for it to be covered. Or in other words - my rates went up - of course. But at least I was covered. I just can't imagine losing everything and having my insurance saying "too bad - DENIED!!"

It's worth an email to your insurance company to make sure. I say email, rather than a simple phone call, because having a paper trail can save your bacon. ALWAYS get it in writing.