Fasten Panels to Frame with Roofing Screws

What happens here

After the pilot holes are drilled, the installer uses an impact driver fitted with a hex socket bit to drive specialized roofing screws through the panels and into the wooden support structure. These particular screws are designed for roofing panels, featuring a large, integrated washer, often with a rubber or EPDM gasket. This washer serves a dual purpose: it creates a watertight seal around the fastener and distributes the fastening pressure evenly across the panel surface, which helps prevent the plastic from cracking or deforming. The screws should be tightened just enough to create a snug fit and compress the washer for a seal, but care must be taken not to overtighten, which could damage the panel.

Goal: Securely attach the plastic roofing panels to the wooden pergola or patio structure.