MY NEW 42"OVEN BUILD.

[ivancito]

Finally plugged the dome and entry arch is done, waiting on chimney anchor plate to build up the chimney. I had 2 heat lamps on overnight and barely reading 150°. Thanks everyone. Ivan

[ivancito]

My outer arch/vent landing almost done. Waiting on my chimney anchor plate to finalize vent opeing size. Having a flared entry is going to be beneficial but was a pain to build the outer arch. I also cut an 1" L-knotch on the bricks to rest on inner dome arch. Thanks everyone.
Ivan

[ivancito]

Congrats! So you plugged it today?

Thanks guys for the encouragement. Larry I have not plugged it yet, I plan on getting it done in the next couple days. Next gotta start on the vent and outer arch which will be another challenge.
Ivan.

[Larry P]

Congrats! So you plugged it today?

[RandyJ]

Hey Ivan congrats. You are almost there. It is looking great.

Randy

[ivancito]

I thought this moment would never get here. All that's left is to cut the plug and my dome is closed. I was hoping for tighter joints but once I went to 3rd bricks the spreadsheet angles were way off. Regardless í am very proud of my work as this was my first brick job. Thanks everyone for getting me here.
Ivan.

[ivancito]

Thanks everyone for all the info on the ceramic blanket.
Ivan

[Larry P]

BTW here's a video of oven insulation being installed at the Forno Bravo factory: https://www.youtube.com/watch?v=Lq4lpzK-uFQ

[Larry P]

If you don't mind me fixing up your math:
layer 1, r = 25.5"
layer 2, r = 26.5"
layer 3, r = 27.5"

Surface area of a hemisphere = 2πr²

area layer 1 = 4086in² = 28.4ft²
area layer 2 = 4412in² = 30.6ft²
area layer 3 = 4752in² = 33.0ft²

total = 92ft²

1 roll = 2ft x25ft = 50ft²

So, theoretically you need 1.84 rolls, with 7% waste. I'd be really surprised if you are able to do that, and I think your last layer would be almost all piecing together from scraps = total pita. I'd suggest 3 rolls. I used almost all of 2 rolls doing 2 layers on my 36" oven, but it's a low dome and I piled a lot or scraps on top to bring it to more of a hemispherical shape.

BTW nice looking build. Beautiful brickwork and I really like the flared entry. Something about the proportions of the whole thing, I find really balanced and aesthetically pleasing.

[JRPizza]

I agree with Randy, my 39" oven took two boxes plus about 8 feet of a third box. Mine sits on 5" of insulating board and I brought the blanket all the way to the slab, so I might have been able to make due with 2 boxes but I think it would have been tight. Since I believe you are planning on an enclosure, I'd be tempted to buy 3 boxes, save enough blanket to build at least one insulated door (maybe enough to build two, and you are going to probably want at least 3" in the door), and pile all the extra on top of your dome. I would have put my remaining on my dome but since I built an igloo didn't want it to be lumpy, but for heat retention I might have been better off.

[RandyJ]

As for how precise you need to be when putting on tge insulation it kind of depends on if you are doing a igloo or enclosure. There have been a few lately the got everything to fit nice and tight and round so the igloo was easier to make round. When I did mine I wrapped a layer around the base then 2 strip over the top for each layer. It was a little lumpy but it didn't matter as you would never see it. Also I am guessing that you will need 3 boxes of insulation to get your 3" layer. It will take most of a box per layer unless you are trying to fit everything very tightly. If you can easily get a extremely box at the last minute then don't worry about it. Just a thought from me. Keep up the good work.

Randy

[ivancito]

Thanks Randy and Russell for the heads up, I will def get suited up for that operation. I will have to borrow the respirator from my job to be on the safe side. Does the blanket need to be precisely fitted to the dome where the strips overlap each other? Does it matter if I lay the strips onto the dome horizontally or vertically, probably both dumb questions just don't want to screw it up now.
thanks everyone.
ivan

[RandyJ]

I second that. I wore my work clothes and eye protection and a respirator. After I was done I was very itchy, and I thought I was prepared. You can't be to safe with the stuff. It does cut nicely with a very sharp razor blade. Don't be afraid to change the blade if it starts to not cut well.

Randy

[UtahBeehiver]

Be sure to wear a Niosh 95 mask, eye protection, junk clothes or disposable coveralls. It is really nasty stuff to handle and cut. Kind of like fiberglass insulation but worst.

[ivancito]

Awesome, thanks guys for chiming in and your valuable time and suggestions. I will pick up 2 boxes of 25ft rolls and make that work. I'm still a week away from needing it but wanted to be prepared.
thanks again.
Ivan