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Which fasteners are appropriate for attaching slate to roof decks?

  1. Copper slating nails

  2. Aluminum screws

  3. Steel bolts

  4. Brass staples

The correct answer is: Copper slating nails

Copper slating nails are the correct choice for attaching slate to roof decks. They are specifically designed for this purpose due to their durability and resistance to corrosion. In roofing applications, especially for materials like slate that have a long lifespan, it's crucial to use fasteners that will not degrade over time. Copper naturally withstands the elements, ensuring that the roof remains intact and secure for many years. Using aluminum screws, while they are lightweight and resistant to rust, may not provide the same level of long-term durability required for slate installations. Steel bolts might offer strength, but they can rust and corrode, which could compromise the integrity of the roof. Brass staples, although they may be appropriate for certain applications, do not have the same robust properties as copper nails when installed in a slate roofing system. The choice of fasteners thus directly impacts the performance and longevity of the roof, making copper slating nails the most suitable option for securely affixing slate tiles to the roof deck.