SGCC / SGCH / G550 Corrugated Galvanized Roofing Sheet with 30–275g/m² Zinc Coating for Building Material Applications

1. Product Overview

Corrugated galvanized roofing sheet is widely used in industrial buildings, warehouses, workshops, and civil structures where low weight, practical corrosion resistance, and easy installation are required. The hot dipped zinc coating protects the steel substrate during outdoor exposure, while the corrugated profile improves stiffness compared with flat sheet.

For building material applications, SGCC is commonly used for general roofing and wall sheet production, while SGCH and G550 are more suitable when higher hardness and better profile retention are required after roll forming.

2. Technical Solution

Product performance is based on:

• Hot dip galvanized coating for barrier protection and sacrificial protection
• Corrugated profile improving stiffness and drainage behavior
• SGCC for general sheet forming applications
• SGCH or G550 for higher hardness and profile stability
• Project-based cut length for roof and wall installation efficiency

In roofing systems, zinc coating level affects corrosion resistance, while thickness and substrate hardness affect sheet rigidity, handling, and performance after installation. Effective width also affects roof layout and overlap efficiency.

3. Specifications

4. Application

• Industrial and civil building roofing
• Warehouse and workshop wall cladding
• Large-span steel structure housing
• Mobile house panels
• Interior and exterior enclosure panels
• General building material sheet systems

5. Processing

• Hot dip galvanized base sheet preparation
• Corrugation roll forming
• Cut-to-length production
• Roof and wall overlap installation
• Fastener fixing on purlins or support members
• Site trimming according to layout requirements

6. Advantages

• 30–275 g/m² coating range supports different service environments
• Corrugated structure improves stiffness without heavy sheet weight
• Multiple effective widths help match different building layouts
• SGCH and G550 options support higher profile rigidity requirements
• Cut-length supply helps improve installation efficiency on site
• Suitable for both roof and wall cladding systems

7. How to Choose

• General building roofing → SGCC is commonly selected
• Higher strength and profile retention requirement → SGCH or G550 is usually preferred
• More exposed outdoor environment → higher coating such as Z180–Z275 is commonly selected
• Project with fixed roof module → confirm effective width before production
• Custom installation length → confirm panel length according to roof slope and overlap design

8. FAQ

Q1: What is the difference between SGCC, SGCH, and G550 for corrugated sheets?
SGCC is commonly used for general galvanized roofing sheets, while SGCH and G550 are more suitable where higher hardness and better profile retention are required.

Q2: Why is effective width different from the formed sheet width?
Because part of the sheet width is consumed by the corrugated profile and side overlap during installation.

Q3: Can these sheets be used for both roof and wall applications?
Yes. They are commonly used for roofing, wall cladding, and light enclosure systems in industrial and civil buildings.

Q4: What zinc coating is suitable for outdoor use?
The suitable level depends on the environment, but higher coating levels are commonly preferred for stronger outdoor corrosion resistance.

Q5: Can the sheet length be customized for a project?
Yes. Corrugated galvanized roofing sheets are often produced in project-based lengths within the specified processing range.