Mold You Can See and Mold You Can't See
12/20/2016 (Permalink)
If you can see it, then you can probably get rid of it with a little elbow grease and soap and water. More stubborn forms will usually succumb to a spraying of a bleach-water solution of 1:9 and a good wipe.
Getting rid of these kinds of spores can be cured by opening a window, turning on a fan before or after a shower, or thoroughly drying the area with a cloth or squeegee.
If you find spores growing on the sub-flooring, drywall or studs especially in areas of more than 10 square feet, then you've got a bona fide mold problem that requires professional removal assistance. Why is Mold Harmful
Check with your insurance agent regarding the relationship between home insurance and mold coverage.