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Gravel Base for Foundation Slab Question - Forno Bravo Forum: The Wood-Fired Oven Community



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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Gravel Base for Foundation Slab Question

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  • Gravel Base for Foundation Slab Question

    Can you have too much gravel base under the slab? I'm looking at about six inches of gravel to get the level up to where it needs to be. The other option is to bring in a load of sand and build up the hole that way.

  • #2
    Re: Gravel Base for Foundation Slab Question

    place a layer of geotextile (the woolly kind) and make sure you pack the gravel down well every time you put a couple inches of gravel. I'd want to make sure the gravel will stay put on the sides - so that may mean making the gravel 6" or so wider than the concrete base.


    • #3
      Re: Gravel Base for Foundation Slab Question

      The thickness itself is not a problem as long as you compact it well as you go. As mingy notes, two inch lifts with hand compaction will do.


      • #4
        Re: Gravel Base for Foundation Slab Question

        I find hand compacting a *lot* of work.

        Of course, I have my own compactor so I might be biased ...


        • #5
          Re: Gravel Base for Foundation Slab Question

          Ha! Mingy you are biased, but it's the good kind of biased, the kind that saves your back!

          Would you believe I actually hired a vibrating plate compactor for my tiny 1.5m x 1.8m foundation? Split the cost with the neighbor so he could do his too, $25 for peace of mind knowing I had a well compacted base for the slab to rest on. Worth it.
          The Melbourne Fire Brick Company