Metal roofs require hundreds, if not thousands of fasteners, and the best tool for getting the job done right is a variable speed screw gun. The max speed recommended when using a screw gun to install metal panels is 2,500 RPM. The speed recommendations vary based on panel type and thickness.
In metal to metal applications the NFBA recommendations (National Frame Builders Association) on Carbon Steel or 410 Stainless Steel are as follows:
• Less than 1/4″ panel – 2,500 RPM
• 1/4″ to 1/2″ – 2,000 RPM
Recommendations for 304 Stainless Steel are:
• All thicknesses – 2,000 RPM if using self-drilling fasteners
• All thicknesses – 1,000 RPM if using self-tapping fasteners
Note: Stainless Steel screws will not penetrate metal panels
For metal to wood applications, a screw gun with up to 2,500 RPM is recommended.