Answer :
Final answer:
The NRCA recommends copper flashing for step flashing in a wood shingle roofing system due to its durability and resistance to corrosion.
Explanation:
It refers to the recommendations of the National Roofing Contractors Association (NRCA) for step flashing in a wood shingle roofing system.
According to the NRCA, copper flashing is recommended for step flashing in wood shingle roofs. Copper is a durable and long-lasting material, which is particularly suitable for roofing applications due to its resistance to corrosion and its ability to form a patina that provides additional protection over time.
Although other materials like aluminum, lead, or vinyl can be used for flashing, copper is often preferred for its durability and performance in various environmental conditions.
