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Frost line question???? - Forno Bravo Forum: The Wood-Fired Oven Community


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Frost line question????

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  • Frost line question????

    After a year of planning I am finally ready to start my build. I live in michigan and I am wondering if I should put the oven on footings below the frost line of42". Its alot more digging and material but I don't want any problems. Any advice would be great....

  • #2
    Re: Frost line question????

    Welcome! Yours is a common question, and you can find many posts on the subject in this forum. A search for "footing" or "floating slab," for example, brings up some good discussions. I believe the prevailing wisdom is that a floating slab on a well-drained base should be adequate for a standard oven. Trust me, a below-the-frost-line foundation is a LOT of extra work and expense, unless you have some free labor lying around. There are other options worth considering too, such as sonotube piers or a poured foundation wall. I don't regret going below the frost line, but if I had it to do over again, I'd go with the floating slab.
    Keep us posted on your progress!
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    • #3
      Re: Frost line question????

      By "floating slab" what is customarily meant is a well reinforced concrete slab 5 inches thick or so. This will be strong enough to withstand settlement or heaving without a slab failure. At worst the slab and oven will tilt a bit.