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Old 04-26-2011, 06:57 AM
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Default Calcium Silicate Bricks for insulation

Hi All,

Im after some advice regarding some second hand bricks im thinking of using as my under-floor insulation.

These are the Calcium Silicate bricks manufactured at Kurnell Sydney over many years, but now no longer manufactured.
THEY WERE MARKETED UNDER THE TRADING NAME - "CALSIL"
They are a standard off white colour.
They are autoclaved sand and cement bricks which are lighter weight yet structurally sound.

These are the only specs I have on them.

I've attached a photo of them also.

Does anyone know if they would be ok to be used for the purpose I have in mind?

Regards,
Bruno
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Calcium Silicate Bricks for insulation-calsil.jpg  
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  #2  
Old 04-26-2011, 08:43 PM
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Default Re: Calcium Silicate Bricks for insulation

They will be fine for insulation purposes.
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Old 04-27-2011, 01:07 AM
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Default Re: Calcium Silicate Bricks for insulation

I though Calsil bricks were house bricks and autoclaved sand and lime?
I laid some similar back in the 70's.

http://en.wikipedia.org/wiki/Brick#C...ilicate_bricks

http://www.schaffer.com.au/about-us/history

.
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Last edited by brickie in oz; 04-27-2011 at 01:17 AM.
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Old 04-27-2011, 06:23 AM
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Question Re: Calcium Silicate Bricks for insulation

My insulating firebricks actually float in water (they are full of air to insulate)....Do those bricks float?
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Old 04-27-2011, 06:34 PM
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Default Re: Calcium Silicate Bricks for insulation

Quote:
Originally Posted by Lburou View Post
My insulating firebricks actually float in water (they are full of air to insulate)....Do those bricks float?
I havent got my hands on them yet. I'm hoping to pick them up next week so I'll let you know then. I suppose if they are no good as insulators I can always use them as normal bricks somewhere in my stand or bbq bench I'm planning on building.

Regards,
Bruno.
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Old 05-01-2011, 10:33 PM
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Default Re: Calcium Silicate Bricks for insulation

Ok, I picked up the bricks this morning and found that they weigh just as much as a normal brick .

Does this mean they arent true insulation bricks?

Regards,
Bruno.
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Old 05-01-2011, 10:37 PM
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Default Re: Calcium Silicate Bricks for insulation

Sounds like a house brick to me.
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Old 05-01-2011, 11:07 PM
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Default Re: Calcium Silicate Bricks for insulation

I'm afraid you may be right Brickie......

Oh well, i guess they're foing into the bbq bench.

Regards,

Bruno
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Old 05-01-2011, 11:10 PM
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Default Re: Calcium Silicate Bricks for insulation

They were all the rage back in the 70's, once laid they absorb the pollutants from the air and go yellow.
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