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  • 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

  • #2
    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...
    Check out my pictures here:
    http://www.fornobravo.com/forum/f8/les-build-4207.html

    If at first you don't succeed... Skydiving isn't for you.

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    • #3
      Re: Vermiculte

      I agree with Les, always do. Medium seems to work best for everyone. Coarse might not hurt, but avoid the fine grain.
      Check out my oven progress here: http://www.fornobravo.com/forum/phot...dex.php?u=4147

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      • #4
        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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        • #5
          Re: Vermiculte

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

          Cheers

          Mark

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          • #6
            Re: Vermiculte

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

            Regards

            Dave

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