Mold often grows behind walls and under carpets and other flooring. This Corona home had mold due to a plumbing issue originating from the bathroom sink. The moisture worked its way into a shared wall between the bathroom and main living area. Call a Corona mold inspector if you suspect mold in your home or you just want to be sure you don't have any. Mold often grows deep within layers that a homeowner might not see if they just do a visual inspection.