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Insulating my existing firebox

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by LYHTSPD, Nov 12, 2012.

  1. LYHTSPD

    LYHTSPD Member

    Joined:
    Apr 7, 2011
    Messages:
    61
    Loc:
    SW Indiana
    I have seen several threads on the forums about insulating between the original steel firebox and a newer insert. Well, I have another level of questions on this.

    My original firebox has the "Heatalator" vents in the front, so there is a thin sheet metal sleeve around the steel firebox to allow convection flow from the bottom vents to the top vents. I made up a little diagram to help out with some visuals.

    [​IMG]

    The dark grey is the existing masonry work, the yellow is the sheet metal (about 1/16" thick), and the red is the 1/4" thick steel plate for the fire box. I was thinking about using Roxul in between the thick steel plate (red line) and thin sheet metal (yellow line). Would this do me any good, or would I be better off insulating directly between my insert and the red line (the thick steel)? I have read through the manual, and have not found anything that says I can't put the Roxul between the main fire box and the insert. I am hoping to get some advice on this.

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  2. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,837
    Loc:
    South Puget Sound, WA
    Seems ok, but ask Quadrafire if they are ok with this first before proceeding. I'd hate to affect your warranty with bad advice.

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