Introduction
Choosing the correct roofing screw is critical for ensuring structural integrity, water tightness, and long-term performance. Using the wrong type can lead to leakage, loose panels, or premature failure.
Key Factors to Consider
- Type of Application
Different applications require different screws:
- Crest fixing: Double thread / full thread screws
- Valley fixing: Standard hex flange screws
- Side lap: Stitching screws
- Material Thickness
Always match the screw to steel thickness:
- Light gauge → Needle point / stitching screw
- Medium to heavy steel → Self-drilling screws
- Sealing Requirement
For roofing applications:
✔ Always use screws with EPDM bonded washers
This ensures:
- Water resistance
- Long-term sealing performance
- Environmental Conditions
Outdoor applications require:
- Corrosion resistance (zinc coating)
- Durable sealing materials
Common Mistakes
❌ Using general-purpose screws
❌ Ignoring washer quality
❌ Choosing incorrect screw length
Conclusion
Selecting the right roofing screw ensures better performance, longer lifespan, and fewer maintenance issues. Always choose screws designed specifically for roofing applications.