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Perlite to concrete ratio? - Forno Bravo Forum: The Wood-Fired Oven Community

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Perlite to concrete ratio?

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  • Perlite to concrete ratio?

    Hello all,
    Can anyone tell me what the ratio of perlite to concrete is for a hearth? I did mine a few years ago and simply can't remember. I know it's more perlite/ less concrete. 8:1? 5:1? Ok, I'm stabbing in the dark.
    Thanks
    Kim

  • #2
    Re: Perlite to concrete ratio?

    5:1 - 8:1 is a good range. More Portland = lower insulating properties.
    Old World Stone & Garden

    Current WFO build - Dry Stone Base & Gothic Vault

    When we build, let us think that we build for ever.
    John Ruskin

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    • #3
      Re: Perlite to concrete ratio?

      Thanks. I was working from memory and the big take from this is knowing that there's still some memory to work from.
      Kim

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