We do not recommend electro-galvanized screws (also called clear-zinc coated) for exterior applications. They will corrode quickly in contact with the elements. Mechanically galvanized screws are generally suitable for decks and other outdoor projects made of pressure-treated lumber.
Shop our selection of Deck Screws in the Lumber & Composites Department at The Home Depot.
Galvanized nails and screws can sometimes cause discoloration with redwood, cedar, and tropical hardwoods, so stainless steel is a safer choice with these materials. Aluminum screws are also an option for redwood or cedar, but not with pressure-treated wood.
Inside the lumberyard, you'd load up on nails, nuts, bolts, screws, and maybe joist. And when water contacts ACQ- or CA-treated wood, it lifts copper ions from .
Most rot-resistant pressure-treated lumber sold for homeowner use relies on two copper-based wood preservatives — alkaline copper quaternary and copper .
Square- or torx-driven screws drive faster and easier and don't strip out when you need them most. If you're using pressure-treated wood for your frame, plan on .
Guidelines for treated wood.. Examples include fasteners (nails, screws and bolts), and all connecting hardware (joist hangers, straps,. for treated wood may be used for extra holding power at structural joints and under horizontal decking.