John writes from Morrison, Colorado: "My home was built in the 1970's and I have rock wool batts in the walls and ceilings. Last week, a sink overflowed and flooded parts of the house. Walls were soaked below along with the insulated garage ceiling below. Is there any concerns I need to address with the insurance adjuster??"

Answer: Where moisture and contamination meet on insulation, mold is a possibility and that concern should be brought to the adjuster's attention. Fiberglass won't support mold growth but the dirt that got on the insulation along with the water could do so.