When securing to pressure-treated lumber, which type of fasteners are recommended?

When securing to pressure-treated lumber, the recommended type of fasteners are galvanized fasteners. Pressure-treated lumber is infused with chemicals to prevent decomposition and insect damage, which can be corrosive to certain metals. Galvanized fasteners, which are coated with a layer of zinc, provide a protective barrier against corrosion caused by the chemicals in the lumber. This helps ensure a longer lifespan for the fasteners and maintains the integrity of the structure being built.

Steel fasteners without a protective coating may rust when exposed to moisture, especially when used in conjunction with pressure-treated wood, leading to premature failure of the fastener. Plastic fasteners, while resistant to corrosion, may lack the strength and load-bearing capabilities required for structural applications. Brass fasteners, although resistant to corrosion, are generally not recommended for use with treated lumber since they may not provide the necessary strength for standard construction purposes and can be more costly. Thus, galvanized fasteners are the most appropriate choice for this application.