Deteriorated LP InnerSeal composite siding was discovered at a recent home inspection on Orcas Island in the San Juan Islands. This siding product was subject to class-action lawsuit for premature failure and elevated maintenance requirements. Well maintained, e.g., painted and caulked pursuant to LP’s recommendations, this product will deliver years of serviceable life. But, if it’s not well maintained it will deteriorate quickly and can lead to underlying structural damage. In this case, I recommended further evaluation by a qualified contractor, one familiar with LP InnerSeal composite siding, to further evaluate and make necessary repairs.