If a building is located within 3,000 feet of saltwater, the roofing nails should be ________ or stainless steel.

When a building is situated within 3,000 feet of saltwater, using hot-dip galvanized roofing nails is crucial due to their enhanced corrosion resistance. The elevated levels of salt in coastal environments can accelerate the deterioration of metal fasteners. Hot-dip galvanization involves coating the steel nails with a layer of zinc, which acts as a barrier against moisture and salt, effectively preventing rust and extending the lifespan of the nails.

In contrast, while aluminum is corrosion-resistant, it may not withstand the harsh conditions as effectively as hot-dip galvanized steel. Copper, while also resistant to corrosion, is often more expensive and less commonly used for roofing applications where nails are needed. Plastic nails might lack the necessary strength and durability required for roofing applications. Therefore, using hot-dip galvanized nails in these conditions provides a practical solution for preventing premature failure of the roofing system.