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Thread: Sand, vermiculite, or just a blanket?

  1. #11
    Join Date
    Feb 2017
    Clayton, ON, Canada


    Interesting - I was thinking about this as an option too and am glad to hear you've had good experiences with it. I have a bunch of roxul left over from a previous renovation, so I think I'll go this route and save myself a few bucks instead of doing the vermiculite. Did you cover the roxul with a lay of the fire blanket, or just leave it exposed? Given it's not loose like vermiculite, I'm thinking it would work without the need for a fire blanket.

  2. #12
    Join Date
    Mar 2011
    North Grenville, Ontario


    It does not need fire blanket to cover it. Works just as well as fire blanket.
    Only put it where it is not going to come into contact with wood from the firebox.
    It will last a long time
    600 taps on vacuum
    Lapierre mechanical Releaser
    CDL electric releaser
    2.5 x 10 CDL Venturi
    Home made auto draw off
    Homemade RO 2 x 4" membranes
    CDL 16 x 16 bottler
    Wesfab 7" filter press
    Delaval 73 vacuum pumps

    12 hives of bees

  3. #13
    Join Date
    Jan 2008
    Hopkinton, MA


    I put a single layer of 1/2 fire brick on top of vermiculite. I wanted something lighter than sand and my experience with outdoor boiling taught me that sand absorbs moisture something awful. The layer of brick is less about insulation than it is making sure I don't trash whatever is back there with my flue brush.
    Woodville Maples
    Around 300 taps on tubing, 25+ on buckets if I put them out
    Mix of natural and mechanical vac, S3 Controller from Mountain Maple
    2x6 W.F. Mason with Phaneuf pans
    Deer Run 250 RO
    Ford F350
    6+ hives of bees (if they make it through the winters)
    Keeping the day job until I can start living the dream.

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