Decks, Patios, Porches and Docks - Does copper flashing corrode aluminum siding?

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Pascal
09-17-09, 09:46 AM
I have seen warnings not to use aluminum flashing because the copper in treated wood will corrode it. My house has aluminum siding. If I use copper flashing for the ledger board will the copper in the flashing corrode my siding?

lefty
09-18-09, 12:37 PM
If you use the copper flashing, cover it with Grace Vycor or some sort of 'peel-and-seal' flashing so that there is no conact between the flashing and the aluminum siding.