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Corrosion of Aluminum Flashing in Contact with Pressure Treated Wood Decks

DonanEngineering Articles, Forensic Engineer, Forensic Engineering, Structural Damage & Collapse

When decks are attached to a house, flashing is installed under the siding and over the deck joist attached to the rim joist of the house to direct water away from the joists. The deck joist is normally pressure treated wood and the rim joist is not normally pressure treated wood.  If the flashing fails the rim joist is exposed …