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  #81  
Old 04-10-2013, 08:13 AM
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Join Date: Jan 2013
Location: virginia
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Default Re: 42" build in Virginia

As I am considering ordering my insulating blankets, I have a few questions that need some help answering. The FB blankets are $210 before shipping, 3 1" blankets.

I checked McGills and they are less than that even with shipping.

I was thinking of getting two boxes of the 2" blanket rather than 3 boxes of the 1" blanket. The cost is about the same, but I would end up with 4" of total insulation if I use the two rolls of 2" blanket, vs using three rolls of 1" blanket. How does that sound?


Will one blanket cover the 42" dome completely? Does the vent get covered?
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  #82  
Old 04-10-2013, 09:38 AM
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Default Re: 42" build in Virginia

One roll will cover your oven one layer, plus maybe a bit. your plan for 2" blankets will probably work just fine, though I imagine they are a bit tougher to lay than the 1" blankets. The stuff is not really designed for dome shapes...


As for the vent - you can usually run blanket across it with a cutout for the chimney as part of each layer.
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  #83  
Old 04-10-2013, 09:51 AM
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Default Re: 42" build in Virginia

Hey Fabby aka Flabby,

I just finished insulating my build, had a roll of 1.5" x 4' X 25' got two layers on with about 4'x4' piece left over. I like Al's idea of buying a cheap throwaway paper coveralls to keep from dragging the fibers in the house and in mom's washer
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  #84  
Old 04-10-2013, 11:18 AM
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Default Re: 42" build in Virginia

russell, where did you get your blanket from? Did you do two layers of 1.5"?
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  #85  
Old 04-10-2013, 01:27 PM
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Default Re: 42" build in Virginia

I picked it up at a surplus sale. But any refractory supply store carries CF. I would do a google and see what is locally available. I did use two 1.5" layers of CF. I cut our triangle slices of the blanket to make it form fit the dome. It is really nasty stuff, wearing good gloves, eye protection and a dust mask plus the paper coveralls would be advised.
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  #86  
Old 04-12-2013, 08:36 AM
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Default Re: 42" build in Virginia

Hello, I am off to pick up my terracotta flues today, they have an 8"x8" that seems like it will work, 24" tall. Is this a good size or should I go larger, they also stock a 8x12 and larger ones.

I was thinking of going up four feet to get to the top of my future stucco house.

Any thoughts?
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  #87  
Old 04-12-2013, 09:29 AM
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Default Re: 42" build in Virginia

8X8 will work fine.
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  #88  
Old 04-12-2013, 03:17 PM
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Default Re: 42" build in Virginia

OK, so I got two 8x8 flues that are 24" long. the ends are not tapered so that the ends will butt up instead of slip into each other. How do you connect them to go up 4'?

Are the flues insulated or do I build a brick chimney to surround? I have done a search for this and I am even more confused. NOt sure my arch will support a brick chimney, and I am running out of firebricks. I do have plenty of house bricks. Thanks for the insights.
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  #89  
Old 04-12-2013, 03:24 PM
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Default Re: 42" build in Virginia

I think you mortar them together, but they are intended to be inside a brick chimney.

you can make that out of house brick, as long as it's not exposed to flame housebrick is fine.

You can use your chimney support brick as your arch buttress. there are some ovens designed like that on the site.
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  #90  
Old 04-12-2013, 03:25 PM
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Default Re: 42" build in Virginia

how much space do I leave between the flue and the brick chimney?
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