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  #171  
Old 07-06-2013, 01:02 PM
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Join Date: Jul 2013
Location: mineola texas
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Default Re: Insulation Efficiency

Gary,

I put fire clay powder and mixed it with water and put it on top of slab and then placed the fire brick on the fire clay powder mix. I hope that retains the heat for the pizza oven floor. I will take the face brick off tomorrow and put the blanket on Monday. I found a place in Dallas Texas that sells it. I will double it up. It is 8#. Thanks for all your help. I been a home builder in East Texas for 35 years.

Regards
Dallas dallasnicholshomes.com
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  #172  
Old 07-06-2013, 01:29 PM
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Join Date: Jul 2013
Location: mineola texas
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Default Re: Insulation Efficiency

Gary,

I still have 2 bags of the fire clay powder can I put it on top of the fire brick dome instead of the blanket. If so how thick do I apply the fire clay powder. I has a temp shield of 2300 degrees. Then I will let it dry for a couple days and then lay the face brick on top of the fire clay mortor.
Please let me know.Thanks again Dallas
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  #173  
Old 07-06-2013, 01:53 PM
david s's Avatar
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,716
Default Re: Insulation Efficiency

Quote:
Originally Posted by dallas2 View Post
Gary,

I still have 2 bags of the fire clay powder can I put it on top of the fire brick dome instead of the blanket. If so how thick do I apply the fire clay powder. I has a temp shield of 2300 degrees. Then I will let it dry for a couple days and then lay the face brick on top of the fire clay mortor.
Please let me know.Thanks again Dallas
The fireclay will not act particularly well as an insulating layer on its own. You need to use the blanket or vermiculite or perlite. A layer of clay only will have a similar thermal conductivity to that of brick. So if the only insulation you have between your floor bricks and the supporting slab is the clay layer then you will lose a lot of your floor heat. Likewise a thin clay layer over the dome will do little to hold in the heat of the dome.

What plans are you following?

Last edited by david s; 07-07-2013 at 01:03 AM.
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  #174  
Old 07-06-2013, 02:38 PM
Serf
 
Join Date: Jul 2013
Location: mineola texas
Posts: 8
Default Re: Insulation Efficiency

Gary,
I have decided to use vermiculite. What is the mix rate with Portland cement. my pizza dome is appox. 16 sq ft. So how much vermiculite to Portland . You put the water in gently. Correct?


Thanks for all your help, Dallas
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  #175  
Old 07-06-2013, 02:57 PM
Serf
 
Join Date: Jul 2013
Location: mineola texas
Posts: 8
Default Re: Insulation Efficiency

Quote:
Originally Posted by dallas2 View Post
Gary,
I have decided to use vermiculite. What is the mix rate with Portland cement. my pizza dome is appox. 16 sq ft. So how much vermiculite to Portland . You put the water in gently. Correct?


Thanks for all your help, Dallas
Gary,
My pizza oven has concrete floor for the base with 1/2 inch fire clay refractory on top of concrete, followed a layer of firebrick. So am I loosing to much heat at the floor? Let me know, if so I will take the dome out and start all over. The dome height is 17.5 inches. So I can't do vermiculite and then another layer of fire brick with current setup. Let me know what I need to do. I do appreciate all your help.
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  #176  
Old 07-06-2013, 03:10 PM
brickie in oz's Avatar
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Join Date: Mar 2009
Location: Whittlesea
Posts: 3,455
Default Re: Insulation Efficiency

Quote:
Originally Posted by dallas2 View Post
Gary,

I put fire clay powder and mixed it with water and put it on top of slab and then placed the fire brick on the fire clay powder mix. I hope that retains the heat for the pizza oven floor. I will take the face brick off tomorrow and put the blanket on Monday. I found a place in Dallas Texas that sells it. I will double it up. It is 8#. Thanks for all your help. I been a home builder in East Texas for 35 years.

Regards
Dallas dallasnicholshomes.com
Quote:
Originally Posted by dallas2 View Post
Gary,

I still have 2 bags of the fire clay powder can I put it on top of the fire brick dome instead of the blanket. If so how thick do I apply the fire clay powder. I has a temp shield of 2300 degrees. Then I will let it dry for a couple days and then lay the face brick on top of the fire clay mortor.
Please let me know.Thanks again Dallas
Quote:
Originally Posted by dallas2 View Post
Gary,
My pizza oven has concrete floor for the base with 1/2 inch fire clay refractory on top of concrete, followed a layer of firebrick. So am I loosing to much heat at the floor? Let me know, if so I will take the dome out and start all over. The dome height is 17.5 inches. So I can't do vermiculite and then another layer of fire brick with current setup. Let me know what I need to do. I do appreciate all your help.
This sounds like another doomed to fail oven that will never retain any heat and use a forest of firewood just to get warm.
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  #177  
Old 07-06-2013, 03:51 PM
Laurentius's Avatar
Master Builder
 
Join Date: Nov 2010
Location: Japan
Posts: 844
Default Re: Insulation Efficiency

Hi Dallas,

At what point are you, on your construction? Do you have photos? I hope that you're not at point of no return, where the best solution is to start over and if you are, its better to start over.
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  #178  
Old 07-07-2013, 11:23 AM
Serf
 
Join Date: Jul 2013
Location: mineola texas
Posts: 8
Default Re: Insulation Efficiency

Laurentius,

I still have not heard back from you. Im down to the foundation slab. I have plenty of heat blanket. So what do we do next and then next and next to the finish Thanks
Dallas From East Texas the oven is 4x5 ft
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  #179  
Old 07-07-2013, 01:54 PM
Laurentius's Avatar
Master Builder
 
Join Date: Nov 2010
Location: Japan
Posts: 844
Default Re: Insulation Efficiency

Quote:
Originally Posted by dallas2 View Post
Laurentius,

I still have not heard back from you. Im down to the foundation slab. I have plenty of heat blanket. So what do we do next and then next and next to the finish Thanks
Dallas From East Texas the oven is 4x5 ft
Do you know how to open your private messages? See the Welcome, Dallas2, below is Private Messages. Double click that and it will take you to your messages.
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  #180  
Old 11-29-2013, 10:00 AM
Serf
 
Join Date: Nov 2013
Location: Peru
Posts: 11
Default Re: Insulation Efficiency

Has anyone used dried rice as an insulator for the floor? filled a pot with rice and tossed it on the stove for about a half hour and it blackened the rice touching the pot, but about a half inch off the surface of the pot, the rice was barely warm, an inch off the pot wall, the rice was cool to the touch and was cool all the way through the center. Just an idea I had due to the fact that I have not seen vermiculite for sale here in Peru, but rice is as common as flies here.
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