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Old 12-04-2013, 03:08 PM   #1
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cement board

I have a BIS panorama, airtight, wood burning fireplace. I studded the surround with metal studs and covered the area with Durock New Gen cement board right up to edges of the stove. I now read that the NFPA do not consider this product a non-combustible! I called USG support and was told that they do not recommend any board material as a fireplace surround? They also said that product was fire-rated for 125F I'M CONFUSED! I thought was the whole reason to use cement board and not drywall. Even plywood will not take fire at 125F
Does anyone have any ideas?

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Old 12-04-2013, 03:23 PM   #2
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I would suspect this issue is out gassing...in other words, what kind of fumes are giving off when it gets hot.

Why not look at the MSDS for the product?
Even if you are on the right track, you will still get run over if you just sit there.

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