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Xene 06-15-2012 08:37 PM

Insulation blanket, ceramic insulating tape?
Now that I've finished the dome I have to plow further into unknown territory (the dome seemed like the easy part - easy to envision how to build it anyway) and I have to do the entry and chimney..and now I'm reading all these great threads trying to get a handle on how to proceed, and I'm intrigued with the ceramic insulating tape as a heatbreak.

So my first question is easy much insulation blanket should I order for a 46 inch oven? Any recommended sources?

Secondly, the flat ceramic insulating 'tape' that I've seen some use in their builds...Gulf comes to mind...I'd like my entry to be marble. Could I use that as a heatbreak between the oven floor and the marble where they would meet? Can I cut a narrow pocket out of the underside of my marble to place that ceramic tape and have only a thin section of the marble actually touching the fire brick floor or will that stress the marble too much with heat fluctuation? Is the best way to just seal the ceramic tape against that fire brick and set the marble against it so they do not contact?

Thirdly, if I want to build my entry and chimney with red brick and not fire brick, should I consider a heatbreak there too? If I build it with red brick, should I use homebrew mortar? I've been intrigued with line mortar and am considering going that route for the finish work.


azatty 06-18-2012 06:44 AM

Re: Insulation blanket, ceramic insulating tape?
You'll probably need four rolls. Assuming that you have built the dome on the outside of your hearth, the circumference is about 14.5 feet. The rolls are 25 feet. You'll be short by a couple of feet each layer and will have to "patch" the insulation together. A 42 inch oven requires three rolls, and there isn't much left over. I ordered a fourth roll to insulate my vent transition and chimney chase.

FB has blanket and McGill's Warehouse carries it, too.

Concerning the facade, I bulit an enclosure from steel studs and backer board. There's little to no contact between the enclosure and entry, so there's a heat break. For the decorative arch, I framed a floating arch around the fire brick with steel, affixed backer board strips to it, cut the decorative brick into "L" shaped blocks, and mortared them with homebrew. I filled the gap between the decorative brick with homebrew, too. The only heat transfer will be along the homebrew, and at the fron of the oven, I expect it to be minimal.

You will need a gap between the flue liner and the brick chimney, So that's one kind of break in the chimney. For the facade bricks, a heat break won't hurt and it's easy to build in when you're making the exterior masonry.

Xene 06-18-2012 09:15 AM

Re: Insulation blanket, ceramic insulating tape?
Thanks azatty. Could I get by with three blankets do you think? I'm not planning to insulate the chimney (understanding I need that gap between flu and chimney brick though) - but maybe that is something I should reconsider?

I want to keep the igloo style enclosure, so I am hoping to keep the profile as streamlined as possible. Here is a sketch I put together to show the family what I have floating around in my head as far as this oven build and outdoor kitchen area will (hopefully) ultimately look like:

After I apply the blanket insulation, what is the best medium to cover it with if my intention is to tile the dome? I have beautiful old brick and when cut they are full of different colored rocks, different reds, yellows, and oranges. I'd love to cut my own tile from the brick and use them as a background between green stem and leaf tiles that vine all around the least that is the current fantasy finish. :p

All opinions most welcome!

Laurentius 06-18-2012 12:05 PM

Re: Insulation blanket, ceramic insulating tape?
Your plans are outstanding. Under you prep area, I would install some brackets for adjustable shelves, really will come in handy in keeping down the clutter.

Xene 06-18-2012 12:27 PM

Re: Insulation blanket, ceramic insulating tape?
Thanks! I'm thinking under the hearth will be for tool storage as that seems tight and odd shaped for wood. My brother-in-law wants to design the lower door and the oven door - he's a master woodworker (I am so lucky!) I'm currently considering now how I can pour that counter top with holes for restaurant style stainless bins to set in, stored inside, filled inside, but brought out for pizza making. Will need further concrete counter top research for sure.

So the front of that prep area will be for wood storage. It seems like the storage area should have a little set back for more rain protection. The opposite side of the prep counter would be walled in (with a setback for legs) because I've laid brick paver there for stools (2) so that people can sit there and talk to me (the most likely pizza maker) as I cook. I'm also considering how to make drink holders in the counter top too - I've read what a tragedy it is to knock over your beer with the peal! Mitigate drink spillage is a high priority too.

Laurentius 06-18-2012 01:06 PM

Re: Insulation blanket, ceramic insulating tape?
Hi Xene,

I wouldn't store wood under the prep area, the wood is a haven for critters and even dried, it create a humid environment which is great for mold, fungus and mildew. As for oven tools, I mounted slotted brackets to the side of my oven for pizza/bread peel, brush and broom, blowing tube, shovel.

Laurentius 06-18-2012 01:16 PM

Re: Insulation blanket, ceramic insulating tape?
Xene, this is the type of table that I built out of concrete.

Artefact Design and Salvage Tables

deejayoh 06-18-2012 03:09 PM

Re: Insulation blanket, ceramic insulating tape?
Very cool. What is a "turkish grill"? I searched for a description and came up with 9 pages of restaurants with that name, but nothing like your picture

deejayoh 06-18-2012 03:12 PM

Re: Insulation blanket, ceramic insulating tape?
Also - you can get ceramic fiber tape here

Ceramic Fiber Tape

Xene 06-18-2012 08:27 PM

Re: Insulation blanket, ceramic insulating tape?
Deejayoh - I'm probably not calling it by the proper name, as I'm sure there is an Arabic word for it...sajji perhaps? We want a grill area that is hot, where we can get the meat right on top of the coals, for shish-kabob and burgers, so I'm building it into one of the counters.

My plan is to make it sunken in, perhaps have it fabricated- it would be a shallow box with a hole to sweep out coal at one end - but just wide enough to lay skewers of meat across. When not in use I'm hoping to cover it with several large floor tiles so that the length of it can be used as counter space.

In comparison to this build, that seems easy. :)

Anyone else want to steer me away from storing wood under my prep area? Since my base is set at an angle that opening is only about 18 inches once I get it faced with granite block (today's task) so it is worthless as wood storage, way too tight.

Very cool table Laurentius! Casting the table top is a great idea, I'm imaging a similar project here now...this may never end!

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