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New builder here, re-building an old “Round Boy” oven. I recognize this is primarily a Neapolitan forum, but there’s lots of talent and advice here. It’s a pretty straightforward pre-cast modular half-barrel design, made so no piece weighs more than 75 lbs. It sits on a welded steel rack. The first pieces are two pre-cast base plates. They’re 1-1/2” thick, and they’re cracked, pretty much in a pattern under the load. So I want to replace them. Is 1-1/2” bluestone adequate? Next, I want to supplement the existing insulation. There is no insulation under the firebricks: they sit directly on those cracked plates. So I want to replace the cracked plates with the bluestone; add 1” of ceramic fiber board, and put the firebricks directly on the CFB. I think the advice is, that 2” is minimum, but I figure any insulation beats none, and i got a good deal on the 1” CFB, but don’t have enough for two layers. I also gather I shouldn’t cover or wrap the CFB with foil, so moisture (which WILL get in) can get out.
Next, I want to add another, additional layer of ceramic blanket on top of the dome/barrel. I see I can get it foil-faced. My plan is to use the new, presumably more effective, foil-faced blanket directly against the dome/barrel, and then put the older blanket on top of that. My question is, should the foil side be directly against the dome/barrel, i.e. foil down? Or up, so it’s (from the inside, working outward) dome/barrel; then new CB, then new CB foil, then old CB? Any advice appreciated. Thank you!
Next, I want to add another, additional layer of ceramic blanket on top of the dome/barrel. I see I can get it foil-faced. My plan is to use the new, presumably more effective, foil-faced blanket directly against the dome/barrel, and then put the older blanket on top of that. My question is, should the foil side be directly against the dome/barrel, i.e. foil down? Or up, so it’s (from the inside, working outward) dome/barrel; then new CB, then new CB foil, then old CB? Any advice appreciated. Thank you!
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