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Laying half fire bricks onto reinforced concrete base - Forno Bravo Forum: The Wood-Fired Oven Community

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Laying half fire bricks onto reinforced concrete base

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  • Laying half fire bricks onto reinforced concrete base

    I am building my own external wood oven.

    I have built the base and have a 5 inch reinforced concrete base. I have purchased some half fire bricks for the base/hearth (230 x 114 x 32mm). So with the refractory cement layer there will be a heatproof thickness of about 40mm between the burning wood and the concrete base.

    Question I have is, is this enough to protect the ordinary concrete base from fracturing/cracking with the heat?

    All opinions & advise greatly welcomed

    Geof

    PS. Hello everyone

  • #2
    Re: Laying half fire bricks onto reinforced concrete base

    If I understand this correctly, you have no insulation layer on the top of your concrete base?

    I dont think you should worry about protecting the ordinary concrete. The main issue is that you will lose so much heat with no insulation.
    my own Quest for Fire:
    http://www.flickr.com/photos/leckig/

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    • #3
      Re: Laying half fire bricks onto reinforced concrete base

      If you take portland cement based concrete up through about 550 F, it will deteriorate.

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