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Originally Posted by Fox E  Once you get mold you'll have to dig deep and start over. Option "D" requires more work for sure. But would have longevity. Do it right the 1st time and sleep well. |
You typically do not have mold issues on the ceiling, or above the sprayer where water does not directly contact it. I've had drywall for my ceiling for ever and not a problem.
I say, if the ceiling is already down, and you happen to have leftover CBU, then sure, why not, but I would not tear out a drywall ceiling just to install CBU.