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Grade of vermiculite to use for render? - Forno Bravo Forum: The Wood-Fired Oven Community


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Grade of vermiculite to use for render?

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  • Grade of vermiculite to use for render?

    Hi. I originally purchased all my WFO supplies a few weeks ago, bricks, insulation, mortar, vermiculite etc. After much thought (and many questions on this forum) I decided to lay vermiculite concrete under my calsium silicate board so I purchased some extra vermiculite from the local hydroponic supplier.

    The vermiculite I purchased off him was grade 4 and the size of tiny marbles, the product I purchased a few weeks ago was grade 2 and much finer in size. I mixed the two together to make the concrete and it seems to have worked well.

    My question is what grade (or partical size) should I use for the insulation around the dome once it is complete?

    Last edited by pizzahead; 09-25-2008, 09:43 PM. Reason: typo

  • #2
    Re: Grade of vermiculite to use for render?

    Grade 2 or 3 are the better grades Jase.