web analytics
Cinder block enclosure has cracks in grout lines - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse

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!

Forno Bravo
See more
See less

Cinder block enclosure has cracks in grout lines

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Cinder block enclosure has cracks in grout lines

    Hi,

    A friend of mine just had a modular oven installed. The enclosure is surrounded with a cinder block structure and covered in stucco. The void was filled with a mixture of perlite and cement. Not sure the ratio. He is getting cracks all over the oven where the cinder block grout lines are. Also a few small ones in other places. Do you have any idea what could be causing this? It stared to happen with the curing fires!

    Thanks,

    Scott D.

  • #2
    Re: Cinder block enclosure has cracks in grout lines

    Post some pics, that always helps with answering a question. It sounds like the cracking is because the stucco is bonded directly to the block, which will expand and contract differently than the stucco. I always have seen an uncoupling layer between the stucco and the wall. I'm no stucco expert though....
    Old World Stone & Garden

    Current WFO build - Dry Stone Base & Gothic Vault

    When we build, let us think that we build for ever.
    John Ruskin

    Comment


    • #3
      Re: Cinder block enclosure has cracks in grout lines

      I don't have any photo's, but I could try and get some. The stucco coating is a smooth coat. If that matters. Thanks,

      Scott D.

      Comment


      • #4
        Re: Cinder block enclosure has cracks in grout lines

        Outer finish doesn't matter.
        Old World Stone & Garden

        Current WFO build - Dry Stone Base & Gothic Vault

        When we build, let us think that we build for ever.
        John Ruskin

        Comment


        • #5
          Re: Cinder block enclosure has cracks in grout lines

          Originally posted by sjdritz View Post
          The void was filled with a mixture of perlite and cement. .
          Not that this is causing cracks but why did he add cement at this point? To the problem; is the foundation sound? Since this is outside of the insulation heat should not be the cause (unless the ratio was WAY off).
          Check out my pictures here:
          http://www.fornobravo.com/forum/f8/les-build-4207.html

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

          Comment


          • #6
            Re: Cinder block enclosure has cracks in grout lines

            The foundation is sound.

            Comment


            • #7
              Re: Cinder block enclosure has cracks in grout lines

              If you mix cement with perlite or vermiculite then you also have to add a huge quantity of water. If the water turns to steam suddenly then rapid expansion takes place which can cause cracking. Adding cement to the mix will reduce the layers insulating capacity and the expanding steam problem both make a vermicrete mix problematic. If possible loose vermiculite is preferable like a situation where it is enclosed by a structure.
              Kindled with zeal and fired with passion.

              Comment

              Working...
              X