Roofing sheets coating structure
Ruukki's roofing sheets are made of quality Finnish high strength steel, topped with state-of-the-art coatings. The steel core of the product is served with eight surface treatments, ensuring that it withstands installation and use thereafter for decades to come.
1. Zinc layer
2. Passivation layer
3. Primer
4. Coating
5. Steel sheet
6. Zinc layer
7. Passivation layer
8. Primer
9. Protective paint coat