Do I insulate the whole core and heatriser?

I was wondering if I just needed to insulate the heatriser inside of the gallon barrel, or if I need or should insulate the whole "core" as well. I have this blanket of rockwool I've been using.

I'm still figuring out how to get some clay to make cob, but would just cobbing up the burn box and burn tunnel suffice? The more I think of "how" to proceed, the more confused I'm getting. I'm also considering making an opening in the front of the burn box for loading larger pieces of wood, and for getting a quicker heat-up of the stove top and mass.

The whole thing, with the possible exception of the feed tube, but some like Matthew Walker recomend a lot of insulation there as well.

A. G. Get 'Our Book' at rocketstoves.com ! After' U-read it come back with ?s P.S. U-are too close to a Wood Vertical Post/wall ! Big AL !

William Bronson wrote: The whole thing, with the possible exception of the feed tube, but some like Matthew Walker recomend a lot of insulation there as well.

Thanks William, that's what I was leaning towards, just wanted to make sure, before I messed it up. I'm going to do the entire sides, and add the glass door in the front, as Matt Walker has done. In fact, he has been my inspiration since I found his yt vids last December.

The other question I would have now pertaining to the glass door; what all could one use to make the door? Most likely one would need the frame so it closes tightly, and it would have to made of steel, so it can withstand all that heat.

It seems as if junk yards have been closed down in my immediate area. I haven't found a place where I can go and scrounge for parts. They don't want us to recycle, but to buy it new

Oh well, I'll keep looking and build it up as I can afford it. Even scrap metal is hard to come by it seems. Even junking days are heavily regulated here.

Yeah, Matt knows his stuff, plus he doesn't get too precious about things.
He seems to advocate actually building a flawed rocket stove over just talking about a perfect one.

Regarding the oven door I scrapped a toaster oven recently and kept the glass in case it could be a good door. I am also considering Pyrex plates and such