web analytics
Questionable dome insulation installation - 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

Questionable dome insulation installation

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

  • Questionable dome insulation installation

    Hello again,

    The builders misunderstood my drawing of the insulation and structure for my modular oven (admittedly, we do have a language barrier problem since my Czech is not the best and their English does not exist). Around the dome, they put a layer of refractory cement (fine), on top of that they put the insulating blanket supplied with the oven kit (fine), then instead of filling the space between the insulating blanket and the walls of the enclosure with loose vermiculite/perlite, they filled the space with more refractory concrete (a cement/perlite mixture) which appears to have too much water in it to boot.

    I have a couple of questions about what to do now.

    (1) Cosmetically, the oven enclosure was supposed to be 20cm taller than it is now. Given that the whole enclosure is effectively a (still wet) refractory concrete bunker, it seems that it would be wise to allow the top to breathe since a lot of water is going to need to escape. I was thinking that on top of the existing refractory concrete roof, we could add a wood substructure to support the terracotta roof tiles and leave an air gap between the top of the concrete and the bottom of the roof (perhaps having grates or mesh on the sides directly under the roof to allow airflow). Given the excessive moisture in the dome insulation, is the oven curing process going to take months/years?

    (2) I still need to order the super isol boards for insulation of the oven floor (per my Retrofitting under floor insulation thread), but in the meantime, can I start gentle curing fires? I can reinsert one of the floor tiles to be insulation for now, rather than putting the fire directly on the uninsulated concrete slab. Would it help to have a space heater running inside the oven chamber while we are not there (5 days of the week)?

    Thanks in advance for your advice.

  • #2
    Re: Questionable dome insulation installation

    If you have fine weather let the sun and wind do much of the drying for you, while you wait for your floor insulation. Leave the door off the oven as well. if you place your hand inside and it feels really cold then there is moisture there. Do cover it if it looks like rain though. you can try the space heater, but it is an expensive way to dry the oven out. I don't think it is going to take months or years to dry but it might be a few weeks. A hand held to the outside of the oven in different positions tells you a lot. If it is hot then your insulation is wet there. Once dry it should be cool or just barely warm to the touch.
    Last edited by david s; 08-14-2012, 01:27 AM.
    Kindled with zeal and fired with passion.

    Comment


    • #3
      Re: Questionable dome insulation installation

      Originally posted by david s View Post
      If you have fine weather let the sun and wind do much of the drying for you, while you wait for your floor insulation. Leave the door off the oven as well. if you place your hand inside and it feels really cold then there is moisture there. Do cover it if it looks like rain though. you can try the space heater, but it is an expensive way to dry the oven out. I don't think it is going to take months or years to dry but it might be a few weeks. A hand held to the outside of the oven in different positions tells you a lot. If it is hot then your insulation is wet there. Once dry it should be cool or just barely warm to the touch.
      Thanks, David. The challenge is that the oven is at our weekend cottage, so the opportunities to uncover it during fine weather (as we are having today) are relatively rare. With a breathing roof, I guess it will take longer to dry out than if it had direct sun and wind exposure.

      Comment

      Working...
      X