The minimum gage metal used for valley flashing is:

The minimum gage metal used for valley flashing is:

• A. 28 Gauge
• B. 30 Gauge
• C. 26 Gauge
• D. 36 Gauge

Answer: (A)

Valley flashing must be thick enough to resist tearing and puncture where water flows and where installers may step on or handle it during installation. In gauges, a higher number means thinner metal, so a “minimum gauge” is the thinnest acceptable thickness that still provides reliable performance in that location. Among the given options, the one that meets that reliability threshold without being thicker than necessary is the correct choice. The thinner options would be too weak for the valley, while a thicker option would satisfy the requirement but isn’t the minimum.

Valley flashing must be thick enough to resist tearing and puncture where water flows and where installers may step on or handle it during installation. In gauges, a higher number means thinner metal, so a “minimum gauge” is the thinnest acceptable thickness that still provides reliable performance in that location. Among the given options, the one that meets that reliability threshold without being thicker than necessary is the correct choice. The thinner options would be too weak for the valley, while a thicker option would satisfy the requirement but isn’t the minimum.