Clorox.....Dealing with water in the basement situations, clorox kills mold,,,10% solution...1 cup clorox to 10 cups water....spray and let dry.
Linda C

I was told that Bleach is ineffective at removing mold. While it does clean mold color from materials it does not kill mold spores which is what I want to do.

old thread, but
Sounds like it is lacking roof ventilation to allow that mold to start.