Question 14

Valley flashing for slate roofs shall be a MINIMUM of 20-gage galvanized steel 20-inches wide.

Valley flashing for slate roofs must meet specific minimum standards to ensure durability and effectiveness, which includes being made of 20-gage galvanized steel and measuring at least 20 inches in width.

A) 26-gage galvanized steel 24-inches wide.

This option is incorrect because while it specifies galvanized steel, the gage is thicker than required, making it less suitable compared to the specified 20-gage. Furthermore, the width exceeds the minimum necessary dimensions for valley flashing.

B) 20-gage galvanized steel 20-inches wide.

This option is correct as it meets the stated requirements for valley flashing on slate roofs. The use of 20-gage galvanized steel ensures adequate strength and durability, while the 20-inch width meets the minimum specifications.

C) .0800-inch aluminum 15-inches wide.

This option is incorrect because it uses aluminum, which does not match the requirement for galvanized steel. Additionally, the 15-inch width is below the minimum standard needed for effective valley flashing.

D) .0179-inch zinc-coated G90 15-inches wide.

This option is also incorrect as it specifies a zinc-coated material rather than galvanized steel, which is not compliant with the requirements. Moreover, the width of 15 inches is insufficient for proper valley flashing.

Conclusion

The correct answer, B, is the only option that adheres to the specified requirements for valley flashing on slate roofs, ensuring optimal performance and longevity. All other options either fail to meet the material specifications or do not provide the necessary width, making them unsuitable for this application.