What is the standard gauge of exterior flashing?

The standard gauge of exterior flashing is noted to be 26. This thickness is commonly used because it offers a good balance between durability and flexibility, which is essential for effectively directing water away from roof edges, walls, and other areas where water intrusion might occur. Using a gauge that is too thin may compromise the flashing's strength and longevity, potentially leading to failure in the waterproofing system.

Flashing must withstand exposure to the elements, such as rain, snow, and wind, and a gauge of 26 meets those durability requirements while ensuring ease of installation. Additionally, other gauges, such as 24 or 28, may be used in specific applications, but 26 is widely accepted as the standard for general use in most construction projects.