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Cracks in render - 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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Cracks in render

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  • Cracks in render

    Morning all,
    I originally built my oven a number of years ago and all was going swimmingly for most of that time but I recently noticed a number of hairline cracks in the render of the dome as well as the render of the arch. I beleive the arch cracks are due to a metal plate that my FIL had made for me and the expansion/contraction issue noted on a recent post here and I'll have to address these separately. The ones in the dome worried me much more.
    My initial thoughts were that the render layer was too thin and so I lathered on another layer of render but one of the cracks has 're-emerged'. I'm using standard acrylic render with an oxide colour added. The oven is open to the weather and with the last few days of rain in Melbourne I am concerned about moisture getting into the insulation.
    The most obvious option is to roof the oven but given the location at the end of a deck, this is a little problematic. Any other thoughts or suggestions?

  • #2
    Re: Cracks in render

    It's odd that the acrylic would crack, it's pretty pliable. I would put another coat on and see if they reappear.
    Check out my pictures here:

    If at first you don't succeed... Skydiving isn't for you.


    • #3
      Re: Cracks in render

      Thanks Les,
      Yes, I was a little surprised as well. The 'new' crack is very fine so I'm hopeful that the redner is still a little thin over this area (I don't recall a crack there in the old render) and I'll put another coat on once it stops raining here!