gas fireplace code questions

weaseNovember 21, 2007

I have a Heat-n-glo gas fireplace I'm installing in a remodel. It vents straight up through the ceiling and then through the roof. There's about 1 foot from the ceiling to where it passes through the roof...this is the attic space. I boxed out with 2x6 around the flue and installed a metal firestop on the top portion (10" x 10"). So, from the inside looking up, you can see the 2x6 box and firestop. The drywall goes up to the box I made. Above the firestop is blown insulation, but none of it is touching the flue...that I know about.

So, is this all acceptable code wise? Do they usually drywall up to the flue on the inside? Seems like a lot of heat could escape up and through that area since there is no insulation. Does the drywall need to be taped and mudded at the seams?

I live in Minnesota.

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    Bookmark   November 26, 2007 at 7:39AM
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the firestop is usually two sided or designed to drop down into the room. You could also maintain the required distance around the pipe with sheetrock and finish it with a collar. Yes sheetrock is fire resistant but the paper on it is not.

    Bookmark   November 26, 2007 at 6:31PM
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It's in the teens out right now. Looking at the firestop from below I can see a whole bunch of condensation taking place. I haven't caulked around the firestop yet. But this is the only barrier there is between the inside and the attic space. Seems like a terrible waste of heat.

Wondering if I'm missing something. Should I drywall up to the flue as well and then caulk that?

    Bookmark   November 30, 2007 at 7:59AM
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Anyone know where I can get some answers for this?

    Bookmark   December 4, 2007 at 8:47AM
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