It is recommended that a qualified contractor be involved in the structural investigation. Caution must be observed: Active electrical wiring may be present in the exterior wall.

The investigation of wood components can be conducted in a systematic and progressive manner as follows:

Phase 1

In areas of measured moisture 20% or greater, the wall should be probed with an "ice pick" or similar tool of small diameter rigid material of sufficient length (6 inches or more) to fully penetrate the cladding and sheathing. Penetrations created by the moisture probes can be utilized to insert the ice pick. If upon probing with moderate force the ice pick penetrates the sheathing, stud and/or band joists, it is probable that deterioration exists, and further investigation is recommended (See phase 2 below). Probe a wide area surrounding all high moisture areas. If probing reveals sound sheathing, then further action is unnecessary beyond repair of the discovered source of water entry.

Phase 2

Areas of deterioration should be further investigated by removal of portions of the cladding. All deteriorated sheathing shall be removed to allow inspection of supporting framing. Supporting framing having significant deterioration will typically be removed and replaced with new members of equal size. New sheathing shall be installed. In all cases of such deterioration of the framing, it is recommended that the services of a qualified builder, professional architect, or engineer be obtained. Repair of cladding shall be performed by a qualified contractor.