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can I do both Portland layers days apart? - Forno Bravo Forum: The Wood-Fired Oven Community

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Forno Bravo Forum Community,

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
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To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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can I do both Portland layers days apart?

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  • can I do both Portland layers days apart?

    Assuming I am going to do a vermiculite/Portland hearth insulation layer above the straight Portland structural layer, is it absolutely necessary to do both at the same pour, or same day? I imagine the only real reason for this would be for the concrete layers to adhere to one another better, but if the first (structural) layer is not smoothed, is roughed up, wouldn't that provide enough adhering strength? Can't I do both layers, say, a week apart provided the first layer is prepared in such a fashion? The concern has mostly to do with available finances as well as not deciding fully on what I'm doing about insulating.
    Thanks,
    Kim

  • #2
    Re: can I do both Portland layers days apart?

    Kim,
    You could do it the same day, or wait 10 years. Concrete will adhere to itself rather well, and it is not really necessary to adhere anyway. A lot of weight will be holding that layer in place for a long time.

    Lars.
    This may not be my last wood oven...

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    • #3
      Re: can I do both Portland layers days apart?

      Thanks. That's exactly what I thought. I appreciate the input.
      Kim

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