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Vermiculite or Perlite? - Forno Bravo Forum: The Wood-Fired Oven Community

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  • Vermiculite or Perlite?

    Hi, I'm about to start building the heart and I would like to know if is any difference between the two.
    Thanks.

  • #2
    Re: Vermiculite or Perlite?

    Perlite is a better insulator although once you add cement the difference is marginal. I prefer vermiculite to mix because it mixes up better than perlite and doesn't contain that fine irritating dust that perlite does. I find a 50/50 mix of vermiculite and perlite makes up a more workable mix than either of them alone.
    Kindled with zeal and fired with passion.

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    • #3
      Re: Vermiculite or Perlite?

      Originally posted by david s View Post
      Perlite is a better insulator although once you add cement the difference is marginal. I prefer vermiculite to mix because it mixes up better than perlite and doesn't contain that fine irritating dust that perlite does. I find a 50/50 mix of vermiculite and perlite makes up a more workable mix than either of them alone.
      Thanks!
      I found both in a plant nursery, and I think I will go for a 50/50mix.

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      • #4
        Re: Vermiculite or Perlite?

        although once you add cement the difference is marginal.
        To do the heart, I thought I was supposed to mix the perlite with concrete, now I'm confused

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        • #5
          Re: Vermiculite or Perlite?

          Originally posted by martin_80x View Post
          To do the heart, I thought I was supposed to mix the perlite with concrete, now I'm confused
          Cement is the grey powdery stuff. Concrete is a mix of cement, sand and aggregate
          Kindled with zeal and fired with passion.

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          • #6
            Re: Vermiculite or Perlite?

            you want portland cement for your mix-Type 1. you can get it at home depot/lowes.

            Mix it in large pans or wheelbarrow at about 6:1 (vemi/per to portland) I will have to look at the water required, but enough to make it sticky like oatmeal is how i did it. HTH

            Texman
            My Progress:
            http://www.fornobravo.com/forum/f8/t...ild-17324.html

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            • #7
              Re: Vermiculite or Perlite?

              I found perlite to be half the cost of vermiculite. YMMV

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