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insulation question - 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.
- 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.

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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  • insulation question

    Hi Everyone,

    Am about to lay footings and actually get this oven started after all these years, I am looking forward to the construction.

    I have a question with regards to the dimensioning the instructions talk about 1x3 inch Fornobravo insulation blanket. What I was thinking of doing was actually having 2x3 inch insulation blankets and then also adding approximately 2 inches of vermiculite between the blankets and the housing enclosure.

    Anyone got any thoughts on if this is a good idea/ bad idea?



    Regards
    ikhan42

  • #2
    Re: insulation question

    From all that I read on this forum, you cannot have too much fun and you can not have too much insulation! But I would do the blankets and then pour vermiculite on top of, and all around the oven.
    Good luck on your journey and enjoy your build!
    John
    Build Thread:http://www.fornobravo.com/forum/f8/i...ome-15521.html
    Photos: http://groups.yahoo.com/group/brick-...67884/pic/list
    Oven Blog: http://johns-brickoven.blogspot.com/...ven-folly.html

    Comment


    • #3
      Re: insulation question

      Originally posted by Aegis View Post
      From all that I read on this forum, you cannot have too much fun and you can not have too much insulation! But I would do the blankets and then pour vermiculite on top of, and all around the oven.
      Good luck on your journey and enjoy your build!
      John
      Aegis,

      Thanks for the info I will have about 2 inches between the 2 layers of insulation blanket and the outside wall side to side and have more space front to back I will also have about a foot between the top of the oven and the roof I will be building so I am going to basically do the blankets and then fill the rest of the housing with vermiculite, my only concern is that to do with the weight on the dome.

      Is vermiculite light or heavy the pictures I have seen give me a indication that its light but have never seen or held it in real life.

      Regards
      ikhan42

      Comment


      • #4
        Re: insulation question

        It is very light.

        Comment


        • #5
          Re: insulation question

          If you can't access vermiculite you can alternatively use perlite, which is a slightly better insulator.
          Kindled with zeal and fired with passion.

          Comment


          • #6
            Re: insulation question

            David,

            Perlite it will be then I want to use products that will give maximum effect insulation wise so if Perlite is better then vermiculite then perilite it is.

            Thanks
            ikhan42

            Originally posted by david s View Post
            If you can't access vermiculite you can alternatively use perlite, which is a slightly better insulator.

            Comment


            • #7
              Re: insulation question

              As for the weight, its basically superlight foam.. 100litres was around 2kg or so .. from memory..

              Comment


              • #8
                Re: insulation question

                Hi Ikhan,

                See my build #2. I used aluminum window screen around my oven with 4"-6" spacing. No need to put expensive insulation in the corners where it doesn't do any good.

                Any of the dry-fill insulation will settle over time, in an enclosure, so build up the top layer or place something to restrain it from flowing down hill. Also, use fg house insulation to block off between studs or any place you don't want loose insulation to migrate. Perlite and vermiculite will find its way through a small void and drain out if you are not careful.

                I put perlcrete and rockwool around oven #1 then poured perlite over the top of that. Oven #2 has FB ceramic blanket insulation and loose vermiculite.

                Cheers,
                Bob

                Here is the link to my oven number 1 construction photos!

                Here is the link to my oven number 2 construction photos!

                Comment

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