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5/8″ gypsum required?

DIYjimmy | Posted in General Discussion on November 12, 2022 09:48am

We had a woodstove (Hearthstone Green Mountain 40) installed in our basement. So far, so good.

We’ve passed the framing and insulation inspection and are about to drywall. But I read somewhere that in a room with a wood stove installed, we should be using 5/8″ gypsum on the walls and ceiling. Stepping to 5/8″ will obviously provide a better fire rating and other benefits – but is 5/8″ required by NYS code? thanks for your insights on this.

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Replies

  1. bing0328 | Nov 12, 2022 12:43pm | #1

    Remember the code whatever it is in NYS is the minimum. Your probably not talking more than a $100 difference in cost over 1/2", so I would hang 5/8. And sleep better at night.

  2. firedudec56 | Nov 13, 2022 01:07am | #2

    as mentioned, codes are minimum requirements - pass the code, pass the test, but you got a D
    go with at least 5/8" and you get a better "grade"
    additionally have a CO/smoke alarm in the basement ( at least 8 feet from the stove) preferable one of the new battery operated/wireless interconnect devices with other devices in the living space so you have early warning should you have a fire or CO problem with the wood stove
    good luck

  3. suburbanguy | Nov 13, 2022 04:24am | #3

    I know nothing about the N.Y. building code. Does the whole basement room have to be 5/8 or just behind the wood stove? Perhaps it depends on how far from the wall the wood stove is placed and any wall coverings planned (stone/tile?) If you're at a minimum setback, that might help you decide. Your decision might also depend on your windows/window extensions and door jambs. Electrical box positioning probably wouldn't be affected.
    Don't forget let your home insurer know about your new wood stove.--to maintain coverage. They'd look for any excuse to limit their liability in any future claim, God forbid. They tend not to like wood burning appliances and their rates reflect that.

  4. DIYjimmy | Dec 21, 2022 07:22am | #4

    thought i’d provide this update. this is how we ended up. 5/8” sheetrock throughout. 5/8” durock above woodstove and at the corner. 24 gauge zinc formed to cover the end of an exposed wood beam. the stove is installed 1/2” from concrete collar that supports the chimney. chimney is lined with insulated double wall stainless flu. draft isn’t horrible but as the room gets tighter the stove is impacted. right now it’s pulling air from the sump pit that connects the drain at the base of the stairwell. when the sump is sealed we’ll need to install the cold air returns from the first floor. for now it’s all good.

  5. firedudec56 | Dec 21, 2022 09:15am | #5

    thanks for the update
    looks good, hopefully you get it done soon to enjoy
    Merry Christmas

    1. DIYjimmy | Dec 21, 2022 05:50pm | #6

      if you’ve got the time, i’ve got the beer

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