How should ACQ/CA-treated lumber be detailed against aluminum flashing and standard fasteners to prevent galvanic/corrosion failures over decades?
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Hey, if you’re working on a deck, shed, or any project that involves treated lumber, make sure the wood doesn’t touch aluminum directly. Also, grab some corrosion-resistant fasteners. Doing this little thing now can save you from big troubles later!
Isolate ACQ/CA-treated lumber from aluminum flashing and standard steel fasteners with a durable barrier like self-adhered flashing tape or a compatible membrane.
Use stainless steel or hot-dip galvanized fasteners and PVC or coated flashing instead of bare aluminum to prevent galvanic reaction and long-term corrosion.