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Old 04-24-2012, 03:54 PM
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Default Using Insulating Firebrick for Oven Door

I was thinking about using some insulating firebrick splits (which would be attached to wood in the shape of my arch) as a door. Has anyone ever done anything similar? Any thoughts? Thanks!
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Old 04-24-2012, 08:11 PM
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Default Re: Using Insulating Firebrick for Oven Door

In terms of weight and ease of cutting I would have thought a Hebel slab may be better
Has anyone tried this???

http://www.fireratingsolutions.com.au/products.php

Quote:
FRS stocks Hebel blocks. Hebel’s advanced technology results in a versatile light weight fire resistant block allowing for easy installation. It also provides for a high insulation and acoustic value plus can be cut with a hand saw and provides up to 4 hours fire protection.
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Old 04-24-2012, 08:25 PM
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Default Re: Using Insulating Firebrick for Oven Door

I tried Hebel, but it was only 1" thick and it cracked from the heat after a month or so. Might be ok if it's thicker but it is made from Portland cement. Glass stumpers use it for moulds when they fire the glass ( to around 900 C) after several firings it needs to be replaced. The insulating fire bricks will last better as they can handle the heat and have better thermal shock resistance.
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Old 04-25-2012, 12:53 PM
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Default Re: Using Insulating Firebrick for Oven Door

Assuming the firebricks are exposed, are there any health risks in the event the IFB breaks down over time and enters the oven?
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Old 04-25-2012, 04:05 PM
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Default Re: Using Insulating Firebrick for Oven Door

I might be wrong but I thought that there was a insulating firebrick that you can not cut with a hand saw therefore eliminating the health issue. This is the kind of brick that I was thinking (if it exists). I seem to recall being warned about what kind I need to buy.
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Old 04-26-2012, 12:57 AM
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Default Re: Using Insulating Firebrick for Oven Door

I used some hebel to line a simple hibachi box once. After a series of fires over a number of weeks it seemed to break down and get more brittle where it was exposed.

Some of the larger sheets for walls have steel reinforcing

Isn't another name for it AAC
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Old 04-26-2012, 02:01 AM
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Default Re: Using Insulating Firebrick for Oven Door

Quote:
Originally Posted by Bacterium View Post
I used some hebel to line a simple hibachi box once. After a series of fires over a number of weeks it seemed to break down and get more brittle where it was exposed.

Some of the larger sheets for walls have steel reinforcing

Isn't another name for it AAC
AAC is made with Portland cement thats why it breaks down with heat.
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Old 04-26-2012, 01:36 PM
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Default Re: Using Insulating Firebrick for Oven Door

Gudday
Using Insulating Firebrick for Oven Door-doors-002.jpg

Using Insulating Firebrick for Oven Door-door2.jpg

Hebel as an insulating door is great there is not enough heat in a cooling oven to effect it. I have had the same temp. door for over a year before rebuilding another again from hebel. I have also built one for a friend which works well. I have changed my original design and do not bolt them together but us silastic to glue the hebel to a piece of wood. Yes the downside is they are brittle and you can chip the edges quite easily. But there cheap to replace and easy to make all you need is a handsaw and rasp to cut and form it to fit your reveal. I have not used insulating fire brick before but they posibly be alittle tougher than hebel but I recon you could make the same type of door using silastic to glue to the wood. And perhaps have to use power tools to shape. I would consider the weight factor as well we all tend to overmake things sometime and it could become to heavy to use if made to thick.

Regards Dave

Last edited by cobblerdave; 04-26-2012 at 01:46 PM.
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Old 04-26-2012, 01:45 PM
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Default Re: Using Insulating Firebrick for Oven Door

What thickness Hebel panel did you use Dave?
What kind of silastic did you use? Was it high temp stuff?
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Old 04-26-2012, 01:57 PM
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Default Re: Using Insulating Firebrick for Oven Door

Gudday Davids

I just used a masonary type rated to 200C no probs to date
I used 3'' to start with but found it to heavy so I sawed it down to 2" the doors is 500mmx350mm (20"x14") which weighs in a a bit under 9 kg ( sorry can't convert this in my head)

Regards Dave
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