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Big Tom
BBQ Super Pro
Joined: 20 Jun 2006
Posts: 1234
Location: Owensboro, KY
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 Posted: Nov 08 2008 Post subject: |
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| TravisT wrote: |
What type of insulation did you use? I was planning to order some high heat insulation, but then ended up using regular household fiberglass insulation. So far it has held up real good - the only thing that burned was the paper. Thanks again for the pics - they really helped me out. |
Several years ago I built a Backwoods clone (long before the Stump's were popular). I used high temperature mineral wool sheets that I bought mail order from McMaster Carr Supply. It is available in many different temperature ratings and thicknesses.
I would not have considered the residential fiberglass for that type application. Good Thinking!
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Big Tom
Pigs-R-Us Cooking Team
Owensboro, KY / Corinth, MS |
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TravisT
Newbie
Joined: 23 Dec 2007
Posts: 26
Location: Warner Robins, GA
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| Posted: Nov 08 2008 Post subject: |
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Yea I tested out the residential insulation a good bit before using it on this cooker. I was worried that it wouldn't hold up. The residential insulation is not fireproof (it will smolder if exposed to direct flame, and probably enough heat), but with everything being sealed up, even if it gets hot enough to burn or melt the insulation it will run out of oxygen before it gets out of hand. From what I pulled out, the only thing that I noticed was the insulation had turned from pink to white, and the paper was black (not really burnt, but just real discolored).
Overall I think it worked well. In most places there was 2" of space between the inside and outside of the cooker. The insulation had to be packed in there pretty tight. I'm not sure if it would work better if it was loose in there - I know in residential insulation it's best for it not to be packed tight. There is so much metal in the cooker that conducts heat that I'm not sure how much difference it will make.
The other problem I'm having is the fire box side getting real hot. Once I re-do that side I may not have as much of a problem, but before rebuilding this, there is no way paint would have stayed on this side. I planned to use automotive primer/paint. How hot do you think the metal can get before it tears up the paint?
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Big Tom
BBQ Super Pro
Joined: 20 Jun 2006
Posts: 1234
Location: Owensboro, KY
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| Posted: Nov 08 2008 Post subject: |
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The same is true with other clones and the real Stump's GF smokers for the area adjacent to the firebox being too hot for the paint.
If you get a chance to look at some pictures of the smokers try and look at the firebox / fire door area. He uses some alum. diamond plate just above the door for that very reason. Eventhough insulated that area gets too hot for paint to hold. The diamond plate also provides some protection to that area when the firebox door is opened.
I probably have a pic that I can post during the week when I can get to my pc and into photobucket.
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Big Tom
Pigs-R-Us Cooking Team
Owensboro, KY / Corinth, MS |
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