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portland cement to vermiculite - Forno Bravo Forum: The Wood-Fired Oven Community

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  • portland cement to vermiculite

    whats the mix ration porland cement to vermiculite for the below floor isalation layer.

  • #2
    Re: portland cement to vermiculite

    complete instructions:

    Pompeii Oven | Brick Oven Hearth
    My geodesic oven project: part 1, part 2

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    • #3
      Re: portland cement to vermiculite

      Some have used ratios as rich as 5 to 1 and many of us have used 9-10 to 1. I used 9+ to 1 using the slurry method (cvduke's method) and had no problems using that lean a mix. Do a search with "cvduke" in the search box and you should get his thread on the method.

      The leaner the mix the better the insulation value for a given thickness.

      Hope that helps,
      Wiley

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