raising gas insert off firebox floor

kal72 Posted By kal72, Nov 7, 2018 at 12:51 PM

  1. kal72

    kal72
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    Jun 25, 2018
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    I am installing a gas insert (converting from wood burning) and want to raise it off the floor of the fireplace by 4-5". I was either going to build a removable concrete board platform (i.e. metal studs with a concerete board platform, but thinking to achieve 5" it would be easier just to prop it up with four 4 1/2 thick cinder blocks under the legs.

    Do I need to use refractory/firebrick for this use or can I use regular or lightweight cinder block under the legs of the stove (maybe even leftover patio paving stones)
     
  2. DAKSY

    DAKSY
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    Dec 2, 2008
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    You can use ANY of those non-combustible items, but you will need
    something under the front of the unit & the surround to either side.
    We use a rectangular "box", welded up from scrap steel plate from the local steel vendor.
    We paint it whatever color the unit & surround are.
    You could always brake-bend some aluminum AROUND some blocks & paint it.
    The surround is usually about 2" out from the fireplace facing & our "box" is usually
    about 4 -5" out & it looks really nice when done well...
     
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  3. kal72

    kal72
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    Jun 25, 2018
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    thanks DAKSY, so non combustible but don't need fire rated underneath, cool? As for your suggestion for addressing the front of the unit, the insert I am using has a generous faceplate that extends about 7" on all edges of the fireplace which will cover up that bottom section that I raise. Unless I am missing something.
     
  4. DAKSY

    DAKSY
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    The surround usually only comes down a point that is even with the bottom of the fire box.
    The surround & the fire box sit on the hearth. If you raise the box, you will raise the surround.
    Maybe you could post a pic of which unit you intend to install...
     
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  5. kal72

    kal72
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    Jun 25, 2018
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  6. kal72

    kal72
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    Jun 25, 2018
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    toronto
  7. DAKSY

    DAKSY
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    Dec 2, 2008
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    OK, I get it.You can use a picture frame surround.
    You're probably gonna hafta stack a COUPLE of
    different sized bricks/blocks/concrete board to make
    sure the height off the firebox floor matches the height
    off the hearth, but it's doable.
    Post a finished pic when it's done.
     
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