At a recent Oak Harbor home inspection, I discovered deterioration, rot and water damage at the interface between the deck and exterior siding. This interface really should be flashed with a metal flashing detail to prevent water intrusion which can lead to WDO (wood destroying insect) activity and water damage. When deterioration is presenting at this interface, there’s always the possibility of underlying structural damage not visible without invasive inspection. A qualified contractor should further evaluate, invasively, to determine the extent of deterioration and make necessary repairs.