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i recently discovered that i have serious water damage issues in my bathroom - in fairbanks, alaska. the wet floor isn't nearly as worrisome for me, though, as the section of wall behind the tub surround that is apparently infested with black death mold (as identified for me by my friend who turned me on to this website). the funny thing is, the mold only seems to exist behind a section of the tub surround where a piece of green sheetrock had been used. the green sheetrock was not used for any of the rest of the surround area, and i have good reason to believe it was installed during a remodel that included the installation of the surround. ( the house was completely remodeled before i bought it.) the green sheetrock was wet and rotten, but none of the other regular sheetrock behind the surround is wet.
it appears that my primary source of water damage is long term condensation under my toilet tank and leakage from my shower.
i am installing sliding doors for the shower and i have been advised that plumbing hot water thru a mixing valve to my toilet will stop the condensation issue there.
but the mystery of how the mold could be limited to the area where the green sheetrock was hung is the nagging question that caused me to stay up late and write this.
thanks for any help you can provide.