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Old 10-06-2009, 12:28 PM
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Default Vermiculte

Hi all

I am ordering the vermiculite for the insulation today and have been informed it comes in three grades. Fine 1 mm, medium 3-4 mm and coarse 8 mm. Which grade is best to use? Will the 8 mm be too coarse and not set well with the cement? Could both medium and coarse be used? Any suggestions would be greatly appreciated.


Regards

Dave
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  #2  
Old 10-06-2009, 12:37 PM
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Il Pizzaiolo
 
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Default Re: Vermiculte

Dave,

Two bags that I bought were the 3-4 mm. I needed one more and bought the same bag at a different store and it was 1mm. The 1mm is like sawdust, I would avoid that. I think the 3-4 is your best bet.

Les...
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Old 10-06-2009, 03:18 PM
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Default Re: Vermiculte

I agree with Les, always do. Medium seems to work best for everyone. Coarse might not hurt, but avoid the fine grain.
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Old 10-06-2009, 04:25 PM
Il Pizzaiolo
 
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Default Re: Vermiculte

Agreed.....no fine stuff, 1/2 of it will blow away when mixing. It also will be less efficient, creating smaller air pockets in the insulating layer.

RT
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Old 10-06-2009, 06:04 PM
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Default Re: Vermiculte

I used the medium as well and my oven holds heat VERY well

Cheers

Mark
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Old 10-07-2009, 02:26 PM
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Default Re: Vermiculte

Thanks for the replies. I've decided to go for the medium coarse.

Regards

Dave
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