How to Choose Screws for Roofing and Metal Construction
Roofing screws must match the base material, panel thickness, washer type and corrosion environment. For steel purlins, self drilling screws with the right drill point reduce installation time. For timber purlins, sharp point screws and bonded washers are common. Buyers should confirm coating, salt spray requirement, washer diameter and packing before ordering.
Key Takeaways
- Confirm material, dimensions and standards before quotation.
- Match coating and packaging to the destination market.
- Work with a real manufacturer for stable repeat orders.