Pre-painted aluminum panels for roof construction
What is a Pre-painted Aluminum Sheet?
A pre-painted aluminum sheet is produced from aluminum coils as the base material. After surface pretreatment (such as degreasing, phosphating/activation), a primer and topcoat are applied online and cured to form a color-coated aluminum coil or sheet.
The finished product can be cut into roofing panels, purlin covers, or metal tile profiles for use in residential, commercial, and industrial roofing and eaves.
Common alloy grades for pre-coated aluminum coils include 3-series (such as 3003 and 3004) and 5-series (such as 5052). These alloys offer excellent rust resistance, strength, and formability. Thicknesses range from 0.4-1.2 mm, and widths range from 1000-1250 mm, which can be cut to size.
Color-coated aluminum sheets are most commonly used in roofing and façade systems. With durability, corrosion resistance, and long-lasting appearance even under harsh weather conditions, they have become highly favored by manufacturers and builders alike.
Color-Coated Aluminum Coil - Product Information
| Alloy | 3003,3004,5052,etc |
| Thickness | 0.21-0.55 mm (customizable) |
| Width | 500-2000 mm |
| Coatings | PE (polyester), PVDF (polyvinylidene fluoride) |
| Coating thickness | PE ≥ 18 μm PVDF ≥ 25 μm |
| Coil ID | 150 mm, 405 mm, 505 mm, 508 mm, 510 mm |
| Gloss | 10-90% (EN ISO-2813:1994) |
| Coating hardness (pencil hardness) | ≥ 2H |
| Impact resistance | No peeling or cracking (50 kg/cm, ASTM D-2794:1993) |
| Flexibility (T-bend) | 3T |
| MEK resistance | ≥ 100 |
| Fireproof grade | Class A |
| Colors | RAL standard colors or customized |
| Surface | Color-coated finish |
| Applications | Roofing, curtain walls, façades, eaves drainage systems, etc. |
| Packaging | Cardboard box or wooden pallet protection |
| MOQ | 1-3 tons |
Why Choose Prepainted Aluminum Sheets for Roofing?
1. Weather & Corrosion Resistance
PVDF and FEVE coatings provide long-term color and gloss retention against UV exposure, rain, and salt spray. The aluminum substrate naturally forms a protective oxide layer, preventing rust.
2. Lightweight & High Strength
Compared with traditional tiles or concrete roofing, aluminum sheets significantly reduce structural load, ideal for steel structures and lightweight roofing systems.
3. Thermal Reflection & Energy Efficiency
Light-colored, high-reflective coatings reduce roof surface temperature, lowering air-conditioning load and improving building energy performance.
4. Excellent Formability
Suitable for deep drawing, profiling, and bending. Compatible with a wide range of roofing profiles such as concealed-fastener panels, exposed-fastener sheets, corrugated tiles, and spherical eaves.
5. Recyclable & Eco-Friendly
Aluminum is infinitely recyclable, aligning with green building standards and sustainable development goals.
6. Aesthetic Appeal
Available in a wide variety of colors and surface finishes, including matte, gloss, metallic, wood grain, and stone textures. The coatings are highly durable and resist fading, ensuring long-term architectural beauty.
7. Fire Resistance
Corrugated aluminum sheets have a high melting point and excellent fire-retardant properties, effectively preventing flame spread and enhancing building safety.
8. Easy Installation
Prepainted aluminum sheets are easy to cut and shape, simplifying installation and reducing construction time.
9. Low Maintenance Cost
With superior weather resistance and anti-staining properties, cleaning and maintenance requirements are minimal, lowering long-term upkeep costs.
Comparison with Other Roofing Materials
Versus Color-Coated Steel / Galvanized Sheets:
Aluminum does not rust, offers better corrosion resistance, and has a longer lifespan, though the initial material cost is higher. Over the life cycle (maintenance + replacement), aluminum usually offers greater cost-effectiveness.
Versus Traditional Clay / Ceramic Tiles:
Aluminum sheets are lighter, allow faster construction, and support modern architectural aesthetics. However, for insulation and acoustic performance, they are often paired with additional insulation layers.
Conclusion:
Prepainted aluminum roofing sheets combine durability, lightweight design, energy efficiency, and modern aesthetics. With customizable colors, textures, and profiles, they meet diverse architectural needs, making them an ideal choice for sustainable and high-performance roofing solutions.
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