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small cracks appearing in the base and dome - Forno Bravo Forum: The Wood-Fired Oven Community

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New Forno Bravo Forum Feature

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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- The live thread will remain in the AMA forum to view after the session.

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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small cracks appearing in the base and dome

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  • small cracks appearing in the base and dome

    This is odd, but just finished insulating 42 inch oven with three inches of blanket covered with chicken wire, and two coats of stucco. The first coat of stucco has reinforcing fibres, but the final coat does not. I have just finished with my curing fires and all looked fine. This morning i noticed a crack in the stucco base, that continues into the fire bricks i used on the deck, and a very fine crack starting at the base of the dome. I seems heat may be escaping out the floor of the oven. The oven floor is firebrick, and I followed the plans when making the base and insulating hearth. Should I worry about this?

  • #2
    Re: small cracks appearing in the base and dome

    If you did not wait long enough for the outer stucco to dry before firing, that maybe the cause of the cracks, particularly if thestucco coats were thick.Alternatively too much heat too quickly may have caused steam pressure to build up in the insulation space. The outside shell is only a weatherproof covering so it really doesn't matter, although cracks are also places where water can enter, so it's probably advisable to seal up any cracks on the outer shell.
    Last edited by david s; 11-19-2012, 06:59 PM.
    Kindled with zeal and fired with passion.

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    • #3
      Re: small cracks appearing in the base and dome

      I wouldn't worry too much. There are plenty of instances where other good builders have observed cracks. They don't hinder the performance too much. Just fill as you can and consider it "character"!

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