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Water protection for super isol - Forno Bravo Forum: The Wood-Fired Oven Community



I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

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.

Ask Me Anything New Forum Feature

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.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

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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Water protection for super isol

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  • Water protection for super isol

    I used super isol board for my hearth insulation and now that my dome is in place I realize that the expansion space between the floor and dome is pretty generous - 1/2 to 3/4 inch all around. The instructions are crystal clear with regard to the fact that this space should not be mortared so that things can move as they heat and cool.

    I'm a little concerned about water. I won't have much of a roof overhang and my entry arch only protrudes about 4 1/2 inches in front of the Casa shell. I don't see any indication that the board will be damaged by small amounts of water, but it sure will absorb a lot - it sucks water right out of mortar.

    Any suggestions on waterproofing or whatever without compromising the expansion gap? With the door provided, rain could still get between the landing portion of the floor and the dome entryway. Any water that gets in there will need to be evaporated off one way or the other. It just seems like it would be better to have it trapped in the oven chamber than leaking into the insulated space.

  • #2
    Hi Alan,

    The expansion gap is fine, and your description sounds right.

    You will want to keep moisture out of the oven -- everything inside the oven will absorb moisture if you give it a chance, including the oven dome and floor, and if it ever got that far, your SuperIsol and even the concrete hearth.

    To keep the inside of the oven dry, always put the door back on the opening when you aren't using the oven, and make sure you have a spark arrestor, or other way of keeping water from coming down the chimney, where it will land on our vent floor area.

    Also, make sure that your oven landing -- in front of the vent landing floor piece, is also sealed so that water doesn't wick in there.

    None of this is hard to do, and it will make your oven work better. A bone dry oven heats up faster and cooks better.
    Hope this helps.
    Pizza Ovens
    Outdoor Fireplaces


    • #3
      One more thing

      You can mortar the vent landing piece (the kidney shaped one) in place and up to the oven dome piece, and mortar the vent landing to the front of the cooking floor. That will not compromise how the floor and dome move, and will seal the floor of the oven under the vent and outside the door.
      Pizza Ovens
      Outdoor Fireplaces


      • #4
        Thanks for the guidance.