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Natural Insulation for Rocket Stove  RSS feed

 
Jambo Reece
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Looking for the most sustainable locally sourced material for insulating the flue of the rocket stove which I intend to build out of insulative fire bricks here in sunny old England.

Maybe I'm asking too much here but I want to at least ask the question.

First thing that comes to mind in England is Sheeps wool. Fire retardent, but not sure what temperature it combusts at

Vermiculite, Pomice, and perlite cannot be mined here. Closest place is France which is not too far I suppose.

I have seen mention of sawdust (presumably that would just combust)

And wood ash - Not sure how good an insulator this is

Any thoughts welcome

 
Peter van den Berg
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Jambo,
When you are planning to build the thing out of insulative fire bricks there's no need to insulate. That's to say, in case you mean the white insulative bricks, very lightweight. More insulation could be added around using perlite, vermiculite, lightweight expanded clay aggregate like Leca, the kind which is used for agriculture among others. Anything combustible in one way or another isn't suitable.
 
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