What is the standard gauge of exterior flashing?

What is the standard gauge of exterior flashing?

• A. 24
• B. 26
• C. 28
• D. 30

Answer: (B)

Exterior flashing uses sheet metal at a thickness that balances durability with workability. In the sheet‑metal gauge system, lower numbers mean thicker metal, so 26 gauge sits between the thicker 24 gauge and the thinner 28–30 gauges. This thickness is robust enough to resist tearing, denting, and damage from fasteners and weather, yet light enough to be cut, bent, and formed around openings and corners without excessive effort or cost. Thicker material (like 24 gauge) isn’t usually necessary for flashing and adds weight and expense, while thinner gauges (28 or 30) can deform or fail more easily under wind-driven rain or impact. That practical balance is why 26 gauge is the standard for exterior flashing.

Exterior flashing uses sheet metal at a thickness that balances durability with workability. In the sheet‑metal gauge system, lower numbers mean thicker metal, so 26 gauge sits between the thicker 24 gauge and the thinner 28–30 gauges. This thickness is robust enough to resist tearing, denting, and damage from fasteners and weather, yet light enough to be cut, bent, and formed around openings and corners without excessive effort or cost. Thicker material (like 24 gauge) isn’t usually necessary for flashing and adds weight and expense, while thinner gauges (28 or 30) can deform or fail more easily under wind-driven rain or impact. That practical balance is why 26 gauge is the standard for exterior flashing.