A flaw in an item of property that will, in time, reveal itself and show the property as damaged. Property insurance does not normally cover such damage.
***
Characteristics of property which causes it to deteriorate naturally. For example, the rotting of damp wood or the melting of ice.
***
UK: Deterioration, damage or wastage in the product itself by natural processes without the operation of any external agency. The resultant damage or reduction in value is not fortuitous and therefore outside the scope of insurance. Many property insurances, including all risks’ covers, exclude inherent vice to put the matter beyond doubt.