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Blanket vs loose insulation - Forno Bravo Forum: The Wood-Fired Oven Community

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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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Blanket vs loose insulation

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  • Blanket vs loose insulation

    Is it better to use a blanket (HF10, ceramic, etc.) or loose vermiculite. Or should I use both? I currently have a double row of firebrick dome (one laid flat and the outer on its side for a thicknness of about 7 1/2 inches with mortar). Yet I have no heat retention. My oven will not get any hotter than about 500. The floor is a solid row of firebrick laid flat on about 3/8 inch mortar, so about 2 1/2 inches plus mortar. I don't know what else to do but build an outer frame and add insulation over my dome.

    Any other thoughts on why my oven won't get hot?

    Shannon

  • #2
    Re: Blanket vs loose insulation

    You have a tremendous amount of thermal mass, which means you need a tremendous amount of heat to get it to temperature. You need to insulate the oven. Period. I suggest using ceramic blanket because it is designed specifically to insulate (obviously). You can use loose vermiculite, and the early builders here did so with great success. As material sourcing became easier, most have shifted to blanket over vermiculite. However, there may be cost or sourcing issues that cause you to choose one over the other. You can certainly use both; blanket in contact with the dome and loose fill around it.

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