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  #11  
Old 03-05-2013, 08:56 AM
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Default Re: What do you have for Insulation

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Originally Posted by K79 View Post
Since the oven floor rests directly on the insulation what heat rating should the board be though? How hot does the average WFO get on the floor?
Cal-Sil is rated to 1,200 F. You wont/don't need to reach those temperatures in a WFO.
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  #12  
Old 03-05-2013, 09:01 AM
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K79 K79 is offline
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Default Re: What do you have for Insulation

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Originally Posted by V-wiz View Post
Cal-Sil is rated to 1,200 F. You wont/don't need to reach those temperatures in a WFO.
Ok, I just wanted to make sure that it wasn't possible to accidently fire it up with too much wood and exceed 1200 degrees.
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  #13  
Old 03-05-2013, 09:08 AM
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Default Re: What do you have for Insulation

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Ok, I just wanted to make sure that it wasn't possible to accidently fire it up with too much wood and exceed 1200 degrees.

It is possible, just throw in more wood, But why?
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Old 03-05-2013, 10:16 AM
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Default Re: What do you have for Insulation

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It is possible, just throw in more wood, But why?
Just thinking ahead.... nice fall afternoon, 3 year old and a 1 year old drawing your attention (for good reasons of course) and not realizing how hot your oven is getting. Just thinking of what could happen that's all.

Here's a link to the board I can get my hands on. This look ok?

Kaowool High Temp Board:

http://www.fabricationspecialties.com/pdf/hightemp.pdf
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  #15  
Old 03-05-2013, 10:26 AM
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Default Re: What do you have for Insulation

That board is fine, but use sand as leveling bed not mortar (low alkaline resistance).
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  #16  
Old 03-05-2013, 10:42 AM
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K79 K79 is offline
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Default Re: What do you have for Insulation

Ok the distributor just called back the price of that board to put 4" down will cost me around $700 haha. He has another product that he recommends that will cost me $168.

FOAMGLAS:

FOAMGLAS® Boards :: Product overview :: Products :: Building :: FOAMGLAS®, ecological cellular glass thermal insulation systems for durable solutions in building, HVAC installations and industry, produced by Pittsburgh Corning.

will this work? Detailed info link at the bottom has all specs.
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  #17  
Old 03-05-2013, 11:25 AM
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Default Re: What do you have for Insulation

I have seen it used, but it is right on the edge temperature wise. Should be fine for underneath on a normal use oven.
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  #18  
Old 03-05-2013, 11:29 AM
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Default Re: What do you have for Insulation

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I have seen it used, but it is right on the edge temperature wise. Should be fine for underneath on a normal use oven.
On the edge temp wise? It's rated for over 1800 degrees. Others are stating that they use 1200 degree board? Am I misreading something? I definitely don't want to use something that's on the edge of failure.

Thanks
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  #19  
Old 03-05-2013, 11:48 AM
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Default Re: What do you have for Insulation

Hard to get your oven floor much over 900, and even then it is not going to stay there unless you are using a bellows or something.

I recommend McGill's Warehouse for CF goods. Same stuff as our hosts at half the cost, and they are a mail order house. V-wiz' source sounds good too if they are willing to pack stuff up for mailing.

If you are looking for advice, I'd recommend going with a tested material shipped to you (e.g. CF board) vs. sourcing something unknown locally.
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  #20  
Old 03-05-2013, 11:54 AM
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Default Re: What do you have for Insulation

It is rated for 900 degrees which is hard but not impossible to do on a multiple day firing. Note that that is not the working rating, it is the point at which it begins to fail.
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