Galvanized roofing screws feature a protective zinc coating that offers superior corrosion and rust resistance. This makes them exceptionally durable and ideal for outdoor metal roofing applications exposed to harsh weather conditions.

Self-drilling roofing screws are engineered with a drill-point tip that can drill its own pilot hole and cut mating threads in a single operation. Self-tapping screws require a pre-drilled pilot hole before they can tap and secure threads into the substrate.

Stainless steel roofing screws provide the highest level of corrosion protection. They are highly recommended for coastal environments, chemical facilities, or any application where the fasteners are exposed to intense moisture and acidic conditions.

Yes, high-quality roofing screws typically feature integrated EPDM washers. When fastened, these washers compress to form a reliable, watertight seal around the screw hole, preventing water leakage into the structure.

The proper screw length is determined by adding the height of the metal panel rib, the thickness of any insulation or spacers, plus at least 1 inch of penetration into wood purlins or 3 pitches of threads beyond metal purlins.