Old house updated. Lower basement apartment is half underground half not. Main house had a small leak while tenant was out of town of couple of months. Came back and black mold everywhere. Guest apartment is now in studs.
Two Questions: (that can lead to more questions)
1) In bathroom (which is under ground to the window): Black mold removed, we see behind the tiles on the dry wall white specks that look like dust and wipes like dust. The drywall has black paper. Can that just be cleaned with 1 part Clorox and 5 parts water to pass mold test (and for our health) or do we have to demo the wall tiles?
2) Now that about 50% of the dry wall has been removed from the side of the underground section of the apartment is there some kind of ventilation system that can be installed that keeps air moving while tenants are out and unit is closed up? It seems with the heat of weather and coolness of the underground side it encourage fast mold growth. I figured with the walls open it would be a good time to install something like this
Thank you for any advice or additional thoughts anyone can give