I just replaced a leaking shower valve and diverter. I didn’t realize it but the linen closet that backs my shower had some removeable drywall panels allowing me access to see behind the valve. I had concerns about mold and I’m not sure what to make of what I found.
It doesn’t appear to be as bad as I thought it would’ve been. There appears to be some staining/mold and the drywall under the valve definitely eroded away over time. I don’t think it requires a mold remediation service. A few people have instructed me to spray it with bleach and just seal everything back up. I also know there are some DIY borax solutions which kills mold and prevents it from growing again, something bleach won’t do.
Any thoughts or recommendations?