On 5/30/2011 2:39 PM, willshak wrote:

Green board (a waterproof gypsum board made for bathrooms). It doesn't
matter what the outside humidity is, the shower, and sink make their own
own humidity.



I happened to have something that measured temp and relative humidity in
my steamy shower this morning. It gets up to 40% but returns to 20
within the hour.
--
Uno