Is the condo Association responsible for interior mold due to a roof leak during property vacancy?

I am in the process of buying a unit in a condo that currently has a leak on the roof. The Association has agreed to fix the roof, but refuses to repair the interior damage, stating the claim "wasn't filed in a timely enough fashion to mitigate the damage." The property was bank owned and vacant, and then was sold at sheriff sale, so no one was present to file a claim. The Association by-laws state that the roof and outside areas are regularly maintained by them. If there is mold in the walls or to the interior structures, who is responsible? I don't want to purchase this property and find out that the mold is a serious and hazardous concern. If I develop health issues or if there is a concern due to structural damage, what is my liability for that?