What type of fastener is typically used for metal roofing?

Self-tapping screws are commonly used for metal roofing because they are specifically designed to create their own hole as they are driven into the material, which makes them well-suited for fastening metal components. These screws have sharp, pointed tips that allow them to penetrate metal sheets easily, ensuring a tight seal and preventing leaks.

The design of self-tapping screws also allows them to securely fasten metal roofing without the need for pre-drilling, making the installation process more efficient. They are often constructed from materials that resist corrosion, further enhancing their suitability for exposed applications like roofing.

In contrast, wood screws are generally intended for use with wood materials and may not provide sufficient holding power in metal. Sheet metal screws are designed for fastening thin sheets of metal, which is effective, but self-tapping screws typically offer enhanced features for roofing applications, including better sealing and improved resistance to shear forces. Nails can be used in some roofing applications but do not offer the same degree of sealing or grip in metal as self-tapping screws.