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Old 01-16-2013, 12:44 PM
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Default Calcium silicate or ceramic fiber board

I have to make a decision soon as i need to buy the insulation tomorrow. The cal-sil is rated at 1,200F density is 15 lb, dimensions are 12x36x2 , and its $10 a board, at that price i can double it and get a 4 inch insulation under the bricks. Is this overkill?. Or my other option is getting ceramic fiber, rated at 2,800F , density is 17 lb, dimensions are 24x36x2. The box comes with 3 boards and costs about $115. Please take a look at the specs, specifically the density. I would greatly appreciate the feedback. Thanks
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Old 01-16-2013, 03:22 PM
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Default Re: Calcium silicate or ceramic fiber board

OK, I will make up your mind for you. Purchase Cal-sil, double up to 4". Order NOW! Don't hesitate or think about it. "Just Do It".
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Old 01-16-2013, 03:43 PM
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Default Re: Calcium silicate or ceramic fiber board

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Originally Posted by Laurentius View Post
OK, I will make up your mind for you. Purchase Cal-sil, double up to 4". Order NOW! Don't hesitate or think about it. "Just Do It".


Lol, ya that is my thinking also, my main concern is the 15 LB density VS the 17 LB Density of the Ceramic board.
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Old 01-17-2013, 08:51 AM
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Default Re: Calcium silicate or ceramic fiber board

Ill be driving down to the supplier today to pick up the boards. maybe 10 boards.
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Old 01-17-2013, 10:13 AM
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Default Re: Calcium silicate or ceramic fiber board

Let us know when you get it.
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Old 01-17-2013, 02:13 PM
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Default Re: Calcium silicate or ceramic fiber board

Here are some pictures from the warehouse that supplies industrial insulation. Pacific Insulation - Industrial Products - Pipe Insulation, Air Handling/HVAC, Industrial Insulation, Commercial Insulation, Insulation Fabrication. . Heavier than i thought they would be. Its pretty solid, Asbestos free and Made in USA.




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Old 01-17-2013, 10:38 PM
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Default Re: Calcium silicate or ceramic fiber board

Its very porous.
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Old 01-17-2013, 11:34 PM
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Default Re: Calcium silicate or ceramic fiber board

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Its very porous.
, Is that bad? Hopefully no water gets near it. Well its Cal sil and others have used these so i would think it should be ok?

Last edited by V-wiz; 01-17-2013 at 11:38 PM.
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Old 01-17-2013, 11:38 PM
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Default Re: Calcium silicate or ceramic fiber board

The stuff I bought didnt have the big holes in it like in your pic.
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Old 01-17-2013, 11:41 PM
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Default Re: Calcium silicate or ceramic fiber board

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The stuff I bought didnt have the big holes in it like in your pic.
I see, im going to double it, so 4inches, hope thats enough, dont know much about these but just hope i made the right choice
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