1. Color steel roofing sheet introduction
Color steel roofing sheet is produced by direct application of a paint (after applying a treatment and, in most instances, a primer) onto steel sheet in a coil-coating line. Coil-line painting can be used to apply a paint coating directly on uncoated steel sheet or on metallic-coated steel sheet. For maximum corrosion resistance, coil-line painting is often done on metallic-coated steels including galvanized, galvalume and terne coated sheet.


2. Color steel roofing sheet application scope
Color steel roofing sheet is most commonly used for commercial, agricultural, and industrial purposes, however, it is now also being recognized as an excellent form of residential roofing. Galvanized roofing sheet is also known used as sinusoidal, corrugated iron or wriggly tin.


3. Prepainted Galvanized sheet main features:
1)Combine the excellent barrier corrosion protection of aluminum with the galvanic protection of zinc.

2)Preferred product for long-term resistance to atmospheric corrosion

3)The superior corrosion resistance of galvanized steel sheet is achieved by the presence of microscopic zinc-rich and aluminum-rich areas within the coating.

4)Easy to install, high strength and lower costs

5)Prepainted Galvanized steel sheet is widely used as walls or roofs for factories, warehouses, garages, exhibition centers


4. Prepainted galvanized steel roof sheet installation tips:
1)Prepare the roof surface by removing any old roofing, rotten wood, and adding roofing felt to the entire surface.

2)Calculate the number of sheets of metal needed. Divide the area of your roof by the size of the sheets you will be using. Remember that you will want the metal sheets to overlap.

3)Place your first metal sheet in a corner of the roof, flush against the surface.

4)Nail in the first metal sheet to the wood of the roof. You should use about 20 nails per sheet. Whenever possible, nail in the valley between the ridges, where the roofing is closest to the wood.

5)Place the second metal sheet alongside the first with an overlap of 3 to 4 inches (10 cm). Secure the sheets together using hex screws and washers. Whenever possible, line up the ridges of each metal sheet, creating a tighter roof and make it easier to drill in the screws. Screw in the spaces between where you nailed the first sheet to the wood.

6)Nail the second metal sheet to the roof.

7)Continue with the other sheets, overlapping on every side of each sheet except for at the edges of the roof.

8)Secure ridge caps to the bottom lip of the roof. Follow the same method as when installing metal sheets: Overlap the ridge caps both with each other and with the sheets, using hex screws and washers where the metal overlaps and nails where the ridge caps attach to wood. You will use 40 nails for each length of ridge cap.

9)Test roof for any loose spots or places where water can seep in. If any roofing is sticking up, secure it as much as possible with nails or screws if attaching it to other metal sheets.