SGCH Regular Spangle Corrugated Galvanized Roofing Sheet with 650mm Effective Width and 60–275g/m² Zinc Coating

1. Product Overview

Corrugated galvanized roofing sheet is used in industrial buildings, houses, warehouses, and light steel structures where low self-weight, practical corrosion resistance, and easy installation are required. The hot dip galvanized coating protects the steel surface from atmospheric exposure, while the corrugated profile improves stiffness compared with flat sheet.

For this specification, SGCH full hard substrate is combined with a regular spangle galvanized surface. This combination is commonly used when profile retention, panel rigidity, and standard galvanized appearance are required in roofing and wall cladding.

2. Technical Solution

Product performance is based on:

• Hot dip galvanized coating for barrier protection and sacrificial protection
• Corrugated profile for improved stiffness and water drainage
• SGCH full hard substrate for better profile retention after forming
• 76 mm wave width and 17 mm wave height for standard roof sheet geometry
• 60–275 g/m² zinc coating range for different service environments

In roofing applications, coating mass affects corrosion resistance, while thickness and substrate hardness affect sheet rigidity, handling, and fastening stability during installation.

3. Specifications

4. Application

• House roofing sheets
• Industrial building roofing
• Warehouse and workshop wall cladding
• Ceiling panels
• Fence panels
• Light enclosure 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 supports
• On-site trimming according to layout requirements

6. Advantages

• SGCH full hard grade helps maintain corrugated profile shape
• Regular spangle provides a standard galvanized appearance
• 60–275 g/m² zinc coating range supports different corrosion protection levels
• Corrugated section improves stiffness without using heavy sheet
• 650 mm effective width is suitable for small and medium roof layouts
• Applicable to both roof and wall cladding systems

7. How to Choose

• For lightweight residential or industrial roofing, thinner gauges are commonly selected.
• For better rigidity or higher wind exposure, thicker sheet is usually preferred.
• For more humid or more exposed outdoor conditions, higher zinc coating is commonly selected.
• For visible galvanized roof panels, regular spangle is often acceptable.
• For project installation, effective width, cut length, and overlap direction should be confirmed before production.

8. FAQ

Q1: Why is SGCH used for corrugated roofing sheets?
SGCH is a full hard grade commonly used when better profile retention and sheet stiffness are needed after corrugation forming.

Q2: What does 650 mm effective width mean?
It is the actual installed cover width after the corrugated profile and side overlap are taken into account.

Q3: Is 60–275 g/m² coating suitable for roofing use?
Yes. The appropriate coating level depends on service environment and expected service life, with higher coating generally used for stronger outdoor corrosion resistance.

Q4: Can this sheet be used for both roof and wall installation?
Yes. It is commonly used for roof, wall, ceiling, and fence applications.

Q5: Why should sheet laps face away from the prevailing wind?
This helps reduce the chance of wind-driven rain entering side laps and improves waterproofing performance in roof installation.