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chimney mortar - 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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chimney mortar

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  • chimney mortar

    I am ready to begin building a brick chimney and I'm wondering what mortar to use. I'm especially concerned about the heat as it draws up through the vent. I want to build a row or two with brick brick before I put on the duratach anchor plate. Does any one know how hot the air is (temp) as it travels through the vent? Any suggestions about what kind of mortar to use?

  • #2
    Re: chimney mortar

    I have shot my flue area with my IR during a scary fire (flames actually going up the flue into the pipe. I have had sustained brick temps of around 600+ in that area.....I would stick with the refractory mortar.
    another point I would like to make - I used regular mortar for all of my mosaic work which comes right up to my entry brick all around the entry. At this point my isulation is the thinnest of anywhere (2 1/2 of percrete). In the tile directly (within an inch) in contact with the entry bricks I have a reoccuring problem of the Type N mortar crubling/disolving/cracking. I've shot these entry bricks with the IR as well - 400+ degrees. SOOOOO, my advice is to stick with refractory mortar anywhere that you know will be subject to high heat unless that area is exposed to the elements. I've tried regrouting that small strip of tiles surrounding my entry with HeatStop, but because it does not handle the elements (rain) well, it turns to dust within a couple of months. I'm not sure what the answer is for an exposed area that must sustain high heat.



    • #3
      Re: chimney mortar

      The vent area gets really hot. Build it with heat stop if you can get it.
      My geodesic oven project: part 1, part 2


      • #4
        Re: chimney mortar

        I used Heat Stop 50 on my brick chimney, It will sometimes reach 250 degrees in the back area, I havent had any problems with it cracking or seperating inside or out. I also used fire brick for the chimney as well. My only misteak was making the chimney not wide enough, It works great, but not till you've been burning 15 or 20 minutes,,



        • #5
          Re: chimney mortar

          I would recommend to use a liner (heat resistent/fire brick material) in the chimney.