Big Spangle Corrosion Resistant Corrugated Steel Roof Sheets for Roofing and Wall Cladding

1．Product Overview

Big spangle corrugated steel roof sheets are used for roofing and wall cladding applications where corrosion resistance, formed sheet rigidity, and decorative surface appearance are required.

The product uses hot dipped galvalume steel as the base metal and is coated with an organic paint system. The AZ coating supports substrate corrosion protection, while the corrugated profile improves roof drainage and panel stiffness for building projects.

2．Technical Solution

The roofing sheet is produced from galvalume steel substrate with AZ coating from 50–180g/m². After surface coating, the sheet is formed into corrugated roofing profiles.

The top surface uses 15–20 micron polyester plus 5 micron primer. The back surface uses 5–7 micron or 7–8 micron polyester plus 5 micron primer.

Available paint systems include PE, SMP, and PVDF. PE is suitable for standard roofing applications, SMP is used for improved weather resistance, and PVDF is selected for stronger UV resistance and longer exterior service.

3．Specifications

4．Application

This product is suitable for roofing sheets, wall cladding, warehouses, workshops, steel structure buildings, industrial buildings, commercial buildings, container-related panels, and home appliance applications.

It is commonly used where roofing or wall panels require corrosion protection, stable surface appearance, lightweight installation, and reliable outdoor performance.

5．Processing

• Sheets can be supplied according to required project length.
• Different effective widths and corrugated profiles can be arranged according to roofing layout.
• The product supports cutting, stacking, bundling, and export packing.
• Customized RAL colors can be produced according to project requirements.

6．Advantages

• The galvalume substrate provides corrosion resistance for roofing and wall cladding applications.
• The 50–180g/m² AZ coating range supports different outdoor exposure environments.
• The corrugated profile improves sheet rigidity and rainwater drainage performance.
• PE, SMP, and PVDF paint systems allow selection according to weather resistance requirements.
• Bright and matt surface finishes are available for different project appearance needs.
• Customized colors help match building design and architectural requirements.

7．How to Choose

• Choose PE coating for standard roofing and wall cladding projects.
• Choose SMP coating when better weather resistance is required.
• Choose PVDF coating for high UV exposure or longer exterior service.
• Choose higher AZ coating levels for humid, coastal, or industrial environments.
• Choose sheet thickness according to roof span, wind load, and required panel rigidity.
• Confirm effective width, length, wave profile, color, and packing method before production.

8．FAQ

Q1．What is this product used for
It is used for roofing sheets, wall cladding, warehouses, workshops, steel structure buildings, and general construction projects.

Q2．What coating systems are available
PE, SMP, and PVDF coating systems are available.

Q3．Can customized colors be supplied
Yes. Colors can be produced according to RAL Card or customer-approved samples.

Q4．What is the available coating range
The available AZ coating range is 50–180g/m².

Q5．Can the wave profile be customized
Yes. Standard wave width is 76mm and wave height is 17mm, and customized profiles can be discussed according to project requirements.