web analytics
silver foil - insulation layer - Forno Bravo Forum: The Wood-Fired Oven Community


1 of 2 < >


Hello, Forno Bravo Community Forum members.

As many may have noticed already, the Community Forum site was briefly down today. While working on scheduled routine maintenance, we encountered an error when trying to add a software update. As the site is now back up and running, some of you may notice that some recent data has been misplaced from November 10th up to today. We are currently working on resolving the issue. The forum has full operational capabilities and we encourage all forum members to continue actively posting in the threads.

We apologize for any inconvenience that this issue may have caused you. The Forno Bravo family values each and every member of our community. If you have any issues or concerns, please feel free to let us know on our issues thread here:


Thank you for understanding.
2 of 2 < >

Forno Bravo Forum Thread Message

Hello, Forno Bravo Community Forum Members!

The Forno Bravo team has heard the feedback in regards to the community forum. We wanted to take the time to re-enforce our commitment to a fully engaged Forum with professional moderation.

Our top priority as a company is to fix all forum errors and issues that you are experiencing. As we are swiftly working on these problems, we want to say that we highly value the Forum Bravo Community Forum and every single community forum member.

We have set up this thread so that every member can address any concerns, issues and questions about the forum. Please feel free to ask whatever you would like in regards to the forum; let us know what issues you are experiencing so we can work on resolving them as fast as possible. However, we stress that we would like constructive engagement, so please be specific about the issue you are experiencing.

Thank you for all of your patience and continued support.

Link to topic: http://www.fornobravo.com/community/...with-new-forum
See more
See less

silver foil - insulation layer

  • Filter
  • Time
  • Show
Clear All
new posts

  • silver foil - insulation layer

    hi all

    About to start the insulation on my dome....after a few running repairs this morning

    Is it best to put silver foil on before the blanket and then the vermiculite outer layer


    blanket - silver foil - vermiculite..


    silver foil - blanket - silver foil - vermiculite...

    also the vermiculite outer mix is 5 -1 cement is it ok to add a little sand to the mix


  • #2
    Re: silver foil - insulation layer

    With silver this morning at $13.75 an ounce, I'd skip the silver foil. In fact, I'd skip any foil whatever. The most common, aluminum, will be corroded instantly by the portland cement. It really doesn't have any function.
    My geodesic oven project: part 1, part 2


    • #3
      Re: silver foil - insulation layer

      Originally posted by ross View Post
      hi all

      also the vermiculite outer mix is 5 -1 cement is it ok to add a little sand to the mix

      Hey Ross,

      The foil really doesn't add any value to the system with the blanket insulation. And the Portland does corrode the foil in short order.

      And the sand in the vermiculite mix will not add any value.. the idea is to get as much 'insulation' as possible, and that comes from the vermiculite. You use the Portland (cement) to hold the vermiculite together. The less Portland you use the better the insulation value; there is one guy in this forum who was getting as much as a 12:1 mix. As some point you need the Portland to provide the strength to keep the whole thing together and you can't go wrong with the 5:1 mix.



      • #4
        Re: silver foil - insulation layer

        Don't add sand the the vermiculite cement mix. The idea is to just coat the vermiculite with cement as loose as you can. The mix creates tiny pockets of air- those pockets insulate (think of a double pane window, thin layer of air in between the glass). If you add sand you fill in the air pockets and lose insulation.
        Check out my oven progress here: http://www.fornobravo.com/forum/phot...dex.php?u=4147

        See ALL of my pictures here: