Strength and durability are essential properties required from load-bearing members and under ideal conditions in terms of environment, construction and natural protection, wooden structures and buildings are in service for centuries without significant deterioration. But many existing structures experience ongoing moisture intrusion and resulting decay that significantly compromises the integrity of wood members. If left unmitigated, advanced decay in wood members supporting bridges, deck assemblies, roofs or exterior walls can and does impair the capacity of these elements to support code-prescribed loads. The result is that portions of existing structures can become unfit for occupancy. The economic and environmental impacts are considerable as well; these include demolition and disposal of building materials before the end of their expected service life, expenditure of remediation labor and materials and loss of use costs.