web analytics
Portland/Vermiculite question - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse
No announcement yet.

Portland/Vermiculite question

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

  • Portland/Vermiculite question

    Hi, Popped in the final keystone tonightconfused. I'm curious as to whether I should apply the cement/vermiculite now, or wait until the fire clay has cured somewhat, or until after I fire cure the oven. Hopefully I can entice a neighbor to take some pics so I can post them.

  • #2
    Re: Portland/Vermiculite question

    You need to keep your dome covered and damp for at least a week before you begin heat drying. Whether to cure before or after the insulation is in is a matter of some dispute. With the vermiculite concrete, which retains a LOT of water, you may want to dry it out afterwords.
    My geodesic oven project: part 1, part 2

    Comment


    • #3
      Re: Portland/Vermiculite question

      Hmmmmm... ok, I understand about keeping the dome damp, have been since the soldier course. Because the oven will be 'housed' I was wondering if a portland/vermiculite mix is a good way to go. I have a full 12" of free base for insulation and was considering just pouring loose vermiculite for the full void. The framing for the 'house' is full 2*8 and I was going to insulate that with R40 fibreglass. The roof section will allow a full 24" of insulation above the dome. The reason for all this is the -30 winter weather we get, and the fact that the oven will be used 5 days a week. I'm just being mindfull of the wood use. Any comments gratefully appreciated.
      Ian

      Comment


      • #4
        Re: Portland/Vermiculite question

        If your oven is in a leak-proof enclosure, you can just pour in the vermiculite loose. You probably want to put angled sheets of some non-combustible material in the corners to reduce the volume of material you use.
        My geodesic oven project: part 1, part 2

        Comment


        • #5
          Re: Portland/Vermiculite question

          Excellent, thank you!

          Ian

          Comment

          Working...
          X