SINSUN
1 / 1
Wood roofing screws usually feature a sharp point designed to pierce metal sheets and grip firmly into wood purlins underneath. Metal roofing screws (often self-tapping) feature a drill-bit-like point capable of drilling through thicker metal structures without pre-drilling.
The EPDM rubber washer beneath the metal cap creates a tight seal around the screw hole when driven. This acts as a water barrier, preventing leaks, moisture entry, and subsequent corrosion of the roofing panels.
We offer multiple colored coatings such as Black, Green, and White. Choosing screws that match the paint of your roofing panels provides a clean, seamless finish and enhances the visual appeal of your building.
Yes. Over-tightening can crack or spin out the EPDM washer, which compromises the waterproof seal. The screw should be tightened just enough to compress the washer flat without causing it to squeeze out sideways.
High-quality roofing screws treated with anti-corrosive coatings (like zinc or ceramic layers) can last for decades. Selecting the proper material and coating grade matching your local weather environment ensures maximum lifespan.
