Fire box insulation

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chsmoker

Newbie
Original poster
Nov 20, 2024
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1
Will using a ceramic insulation 2300 degrees fire rating. I would like to put a 1/2” layer on the inside to insulate the trailer underneath. Fire box pic attached. My concern is will this have impacts on the food being cooked? Anyone have any experience/thoughts? Thanks
 

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You don't want ceramic wool to spread into your cooking chamber, ever. Fibers of ceramic wool should be treated the same as asbestos, always wear respirator when handling, cutting, etc.
I would rather pour in a layer of refractory cement for thermal isolation. You can find many brands from the favorite online shopping site but my recommendation is the brand Girtech. It is non-toxic, doesn't contain harmful ingredients like many other do. It can be used as a mortar with regular firebricks and also as a pourable/castable refractory. 1/2" layer would give you 3100F heat isolating barrier. The only drawback of Girtech is that it is very gritty, but if you are pouring a layer that shouldn't be a big problem.
 
We had a member use it where he had a sheet of steel on the inside and outside but put the ceramic in between the 2 sheets of steel. It works really well and since it was 100%sealed(welded) in between the sheets he didn't have to worry about the ceramic getting into the cooking chamber.
 
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