Z275 Ral 2011 Pre Painted Sheet Metal Roofing Color Coated Galvanized Steel Coil

Z275 Ral 2011 Pre Painted Sheet Metal Roofing Color Coated Galvanized Steel Coil

1. Product Overview

Color coated galvanized steel coil is used where a zinc coated steel substrate and a finished color surface are required in one material. This product range is suitable for sheet metal roofing, wall cladding, façade panels, and general construction sheet fabrication where corrosion resistance, appearance, and forming compatibility need to be considered together.

The listed range covers 0.18mm to 1.20mm thickness and 700mm to 1250mm width. With zinc coating from 40g/m2 to 275g/m2 and a polyester based top coat plus primer structure, the product is positioned for roofing and cladding projects that need both metallic corrosion protection and a finished painted surface.

2. Technical Solution

This product uses a galvanized steel base combined with an organic paint system. In actual service, performance depends on three linked factors: zinc coating weight, paint film build, and the forming and installation route.

The top side uses 15–20 micron polyester with 5 micron primer. The back side uses 5–7 micron, or 7–8 micron polyester with 5 micron primer. This coating build is relevant because paint durability is not determined by color alone. It is influenced by primer support, metallic coating level, panel design, cut edge exposure, drainage condition, and the actual atmosphere at the project site.

The page also lists polyester, SMP, and PVDF paint categories. Polyester is generally used for standard projects. SMP is more suitable where improved weather resistance is needed. PVDF is more suitable where UV stability and longer color retention are more important.

3. Specifications

4. Application

This material is suitable for sheet metal roofing, roof panels, wall cladding, and façade sheets in residential, commercial, and light industrial buildings.

It can also be used in workshop roofs, airport and storeroom panels, vehicle related exterior panels, furniture sheet components, and electrical equipment housings where a finished painted surface is preferred over post painting.

For roofing use, final service performance depends on panel profile design, overlap detailing, fastening practice, and the local exposure environment.

5. Processing

• The coil can be supplied for cut to length processing, roll forming, slitting, plain sheet production, and corrugated roofing sheet production.
• It is suitable for bending, profiling, and general sheet metal fabrication. When the final part has visible surface requirements, protective film on the top side can help reduce scratching during transport, storage, and installation.
• For profiled sheet production, thickness, zinc coating, and paint type should be selected together so that forming performance and outdoor durability stay matched to the application.

6. Advantages

• The 0.18mm–1.20mm range covers light gauge roofing and cladding fabrication.
• The 40–275g/m2 zinc coating range allows the product to be matched to different corrosion environments instead of using one fixed coating level for all projects.
• The defined top and back coating structure provides a practical paint build for exterior building sheet use.
• The 700mm–1250mm width range matches mainstream roofing and cladding sheet processing lines.
• Optional polyester, SMP, and PVDF systems make it possible to select the paint route according to weather exposure and finish retention requirements.

7. How to Choose

• Choose a lower zinc coating level for general indoor or lighter exterior conditions, and choose a higher zinc coating level within the listed 40–275g/m2 range when the environment is more demanding.
• Choose polyester for standard roofing and cladding projects. Choose SMP when better weather exposure resistance is needed. Choose PVDF when long term exterior appearance and UV resistance are more important.
• Choose thinner gauges when easier forming and lighter panel weight are required. Choose thicker gauges when the panel needs more rigidity.
• Choose protective film when the painted surface will be exposed to repeated handling before installation.

8. FAQ

Q1. What is the thickness range of this color coated galvanized steel coil
The listed thickness range is 0.18mm to 1.20mm.

Q2. What is the width range
The listed width range is 700mm to 1250mm.

Q3. What is the zinc coating range
The listed zinc coating range is 40g/m2 to 275g/m2.

Q4. What paint systems are available
The listed paint categories are polyester, SMP, and PVDF.

Q5. Can this product be used for sheet metal roofing
Yes. It is suitable for roofing sheet and wall cladding fabrication when the coating level, paint system, panel profile, and installation details are matched to the service environment.