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Concrete sealer, insulation and floor prep questions for Casa 90 instal)Pho - Forno Bravo Forum: The Wood-Fired Oven Community

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  • Concrete sealer, insulation and floor prep questions for Casa 90 instal)Pho

    Finally getting our concrete counter tops into place and getting ready to start moving our new Casa 90 onto it. Took us a bit of time as weve used Buddy Rhodes Craftsment mix in forms for all of our tops. Were about to apply sealant and had two questions:

    -Does it make sense to apply concrete sealer to the countertop underneath the area where our oven will sit?
    Insulation and brick will be sitting on top of this and I dont know how much heat the sealer (also from Buddy Rhodes) can take or if chemicals from the sealer will leach through the insulation and into the oven, brick (and food, oh no!)

    -Should we raise the insulation at all, or is it ok if it sits directly on the countertop?
    Im concerned for moisture as the oven will be exposed and we may run the risk of not having a complete waterproof barrier once we stucco the dome insulation and surround everything.
    Though it doesnt rain often here, theres a chance that water will pool when it does, and seep under the dome/into the insulation. Ive read that some folks have pull drainage/weep holes in their tops to account for this, but would love to void this if possible.

    Ive uploaded the only pic I have of our build on this computer. Oven will be going in the corner of the L on the island. Thanks for the input and all the great forum content so far!

  • #2
    Wet insulation is one of the most common problems with poor oven performance. By placing the CaSi board directly on the concrete heath, any water that migrates in and under the CaSi will dampen the insulation since it is very water absorbent. So you can do a couple things, weep holes (not sure why you want to avoid) you won't see them, there under the dome. No need to seal concrete under the dome, confirm that Buddy Rhoades sealer is food safe (probably is) since you are using it on all of the concrete counters. You can also raise the CaSi board with some spaced out cheap or surplus ceramic tile with with spaces for any water to migrate to the weep holes (which can drill in easily) Some builders use concrete pavers as well. Again wet insulation is one of the most common oven performance problems or take your chances and lay CaSi directly on hearth understanding if CaSi gets wet you will need to recure the oven to drive the moisture out, problem with this is you don't know CaSi is wet until you are cooking and floor is not heating or retaining heat.
    Russell
    Build Link............... Picassa Photo Album Link

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