Henan Gnee New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of pre-coated 3105 aluminum coil for roofing in China. With abundant experience, we warmly welcome you to wholesale high quality pre-coated 3105 aluminum coil for roofing in stock here from our factory. Good service and reasonable price are available.
Pre-coated 3105 Aluminum Coil for Roofing Description
Pre-coated 3105 aluminum coil (also known as pre-painted aluminum coil) is an aluminum alloy base that has been washed, treated, and coated with high-quality paint before being cut or formed. The 3105 alloy is an Aluminum-Manganese alloy. It is slightly stronger than the 1000 series and 3003 alloy, making it the perfect metal base for roofing sheets.
It offers excellent corrosion resistance, good formability for roll-forming machines, and a highly durable color finish. Whether you need standard PE (Polyester) coating for residential buildings or high-end PVDF (Polyvinylidene Fluoride) coating for harsh outdoor environments, GNEE delivers customized thickness, width, and color solutions to match your production lines perfectly.
Key Features of Pre-coated 3105 Aluminum Coil
Why choose 3105 pre-coated aluminum coils for your roofing business? Here are the core commercial and technical benefits:
Excellent Weather Resistance
For outdoor roofing, UV rays and rain are the biggest enemies. Our coils are available with top-tier PVDF coatings. PVDF has superior UV resistance, ensuring the roof will not fade, chalk, or peel for 15 to 25 years, even under intense sunlight.
Strong Corrosion Resistance
Unlike steel, aluminum does not rust. The 3105 alloy combined with a double-layer coating provides maximum protection against humidity, acid rain, and coastal salt air. This makes it highly popular for warehouses near seaports or chemical industrial zones.
Good Formability (No Cracking)
Roofing coils must be pressed into corrugated or trapezoidal shapes. The 3105 alloy in H14 or H16 temper has excellent bending properties. The paint we use is highly flexible. When your machine bends the metal, the paint stretches with the aluminum instead of cracking or peeling off the edge.
Lightweight & Cost Efficient
Aluminum is about one-third the weight of steel. A lighter coil means you get more meters of roofing per ton of material purchased. It also reduces the structural load on the building and significantly lowers your transportation and installation costs.
Customizable Appearance
Visual appeal matters for modern architecture. GNEE can paint the coil in any color from the RAL color chart. We also offer different gloss levels (high gloss or matte) and embossed textures to meet specific architectural demands.
Specifications of 3105 Aluminum Coil
To ensure your roll-forming machines run smoothly without jamming or producing defective roofing panels, precise specifications and tight tolerances are required. Below are the standard supply capabilities from GNEE.
| Parameter | Value |
| Alloy Grade | 3003/3004/3104/3005/3105 |
| Temper | O/H12/H14/H16/H18/H22/ H32/H24/H34/H26/H36/H38/T451 |
| Thickness | 0.3 mm – 200 mm |
| Width | 100 mm – 2500 mm |
| Coil Weight | 2 Tons – 5 Tons (Customizable) |
| Inner Diameter (ID) | 405 mm / 505 mm |
Coating Specifications
| Item | Range |
| Coating Type | PE / PVDF / SMP |
| Top Coating Thickness | 15 μm – 25 μm |
| Back Coating Thickness | 5 μm – 10 μm (Wash coat or primer) |
| Color Options | RAL System / Custom Color Match |
| Surface Finish | Glossy / Matte / Embossed (Stucco) |
Tolerance Control
| Item | Tolerance |
| Thickness Tolerance | ± 0.02 mm – ± 0.05 mm |
| Width Tolerance | ± 1 mm |
| Coating Thickness Tolerance | ± 2 μm |
Recommended & Popular 3105 Aluminum Coil Products
| Product Type | Key Advantages | Main Applications | Coating / Temper |
| Heavy Industrial 3105 Aluminum Coil | Extremely high corrosion resistance | Pipe insulation, storage tank protection | Mill finish |
| Aluminum Jumbo Roll 3105 Aluminium Coil for Roof | High efficiency for large-scale construction | Factory roofs, corrugated sheets | Mill finish or basic coating |
| 3105 H24 Aluminum Coil | Balanced strength and formability | Stamping parts, component processing | Half-hard temper (H24) |
| Pre-Painted PE Coating 3105 Aluminum Coil | Excellent cost performance | Interior decoration, signboards | Polyester coating |
| Double HDPE/PVDF 3105 Prepainted Aluminum Coil | Exceptional weather resistance, long service life | Coastal buildings, high-end curtain walls | High-performance fluorocarbon coating |
Worried about color difference or coating peeling during roll forming? Don't leave it to chance. Provide us with your standard RAL color code or send us your physical sample. GNEE will send you a Free A4-sized Pre-coated Aluminum Sample for you to test on your own bending machines.
Click Here to Request Your Free Sample
Applications of Pre-coated 3105 Aluminum Coil for Roofing
Pre-coated 3105 aluminum coil is widely used in industrial, commercial, and residential roofing systems, especially where corrosion resistance, lightweight structure, and long service life are required.
- Industrial Factory Roofing
Applicable factories:
Machinery manufacturing plants
Automotive factories
Electronics & semiconductor factories
Textile & garment factories
- Warehouses & Logistics Centers
Typical use cases:
E-commerce warehouses
Cold storage facilities
Distribution hubs
- Commercial Buildings
Applications:
Shopping malls
Office buildings
Airports & stations
Exhibition halls
- Residential & Prefabricated Housing
Typical projects:
Prefabricated houses
Villas & residential roofing
Temporary housing
- Coastal & Chemical Plant Roofing
Applicable environments:
Chemical plants
Fertilizer factories
Coastal industrial zones
Oil & gas facilities
- Agricultural & Livestock Buildings
Applications:
Farms & barns
Grain storage facilities
Livestock buildings
Greenhouses (roofing & cladding)
Temper & Specifications of 3105 Aluminum Alloy for Different Applications
| Application | Recommended Temper | Thickness Range (mm) | Surface Treatment |
| Prepainted substrate / Curtain wall | H14, H24 | 0.5 - 1.2 | PE / PVDF coating |
| Bottle cap stock | H14, H16 | 0.22 - 0.28 | Oiled, painted, printed |
| Gutters / Downspouts | H24, H26 | 0.4 - 0.6 | Roll coating |
| Mobile homes / Vehicle panels | H18, H19 | 0.8 - 2.0 | Mill finish or embossed |
| Lamp holders / Heat sinks | O, H22 | 0.3 - 0.5 |
Mirror finish or anodized
|
Production Capability
GNEE is a fully integrated aluminum manufacturer. We manage the entire process from aluminum rolling to color coating and slitting. This gives us complete control over quality and lead times.
- Continuous Coating Lines: We use advanced high-speed continuous roller coating lines. This ensures the paint is baked evenly onto the metal surface.
- Precision Slitting: We can slit large master coils into narrow strips based on the exact feeding width of your roll-forming machine.
- Stable Output: With our large-scale production capacity, we guarantee stable monthly output for long-term wholesale buyers.
Quality Control & Testing
A beautiful coil means nothing if the paint falls off during manufacturing. GNEE implements strict Quality Control (QC) standards for every batch of color-coated aluminum.
Coating Performance Tests:
- Adhesion Test (Cross-hatch test): Ensures the paint sticks firmly to the aluminum base.
- T-Bend Test: We fold the metal to check if the paint cracks at sharp angles. This is critical for roofing sheet production.
- Impact Resistance Test: Ensures the coating can withstand physical strikes without chipping (simulating hail or falling debris).
Durability & Visual Tests:
- Salt Spray Test: We test PVDF coated samples for 500 to 1000 hours in a salt fog chamber to guarantee long-term coastal weather resistance.
- Color Difference Control (ΔE): We use digital spectrophotometers to check the color consistency across different batches. We control the ΔE value strictly to avoid visual mismatch on large building roofs.
- Gloss & Uniformity Check: Ensuring a consistent shine from the beginning of the coil to the end.
Tell us your target thickness, width, coating type (PE or PVDF), and order quantity. Our sales engineers will calculate your final price using today's live SMM (Shanghai Metal Market) base price plus our factory processing cost.
Pricing Mechanism
Final Price = Aluminum Ingot Price (SMM) + Processing Fee + Coating Cost
The SMM (Shanghai Metal Market) price is the public benchmark for raw aluminum. The processing and coating fees depend on:
Thickness & Width: Extremely thin or non-standard widths may slightly increase processing time.
Coating Type: PE is economical. PVDF is more expensive due to its 15-25 year lifespan. Custom colors might require a small color-matching fee for small orders.
Order Quantity: We offer significant bulk discounts for full container loads (FCL).
Payment Terms
To secure your global supply chain, GNEE supports flexible international payment methods:
- T/T (Telegraphic Transfer): 30% deposit to start production, and the 70% balance paid before shipment (or against the copy of B/L).
- L/C (Letter of Credit): 100% Irrevocable L/C at sight is accepted for larger project orders.
- D/P, D/A: Negotiable for verified, long-term VIP distributors.
Packaging & Shipping
Proper packaging is vital. If water enters the coil during sea freight, it can ruin the coating or cause oxidation. GNEE uses strict seaworthy packaging standards.
Standard Export Packaging:
- The coil is placed on a strong, fumigation-certified wooden pallet.
- Wrapped completely in moisture-proof kraft paper.
- Covered with a thick PE protective film to block sea moisture.
- Reinforced with strong steel strapping.
- We offer both "Eye to Sky" (vertical) and "Eye to Wall" (horizontal) packing depending on how your factory prefers to unload.
Shipping Options:
We load efficiently into 20GP or 40HQ containers. For massive government or industrial roofing projects, bulk break vessel shipments can be arranged.
Why Choose GNEE?
There are many aluminum suppliers, so why do roofing manufacturers in Southeast Asia, the Middle East, and Africa choose GNEE?
1. Flexible Orders (Our Core Advantage)
We understand that roofing distributors need to manage inventory carefully. Unlike factories that demand 20 tons of a single color, GNEE accepts multi-size and mixed specification orders. You can mix different colors, widths, and thicknesses in one container. This helps you test the market without tying up your cash flow.
2. Complete Customization Capability
From the metal thickness and coil width to the exact RAL color and coating thickness, we customize the product entirely based on your machine's requirements and your local weather conditions.
3. Rich Export Experience
We know the standards required in different regions. We know how to pack the material so it survives humid sea voyages, and we provide all necessary customs clearance documents promptly.
4. Professional Technical Support
We do not just sell coils. Our engineers can recommend the best alloy temper and coating type based on whether your building is in a dry desert, a snowy region, or near the salty ocean.
Certifications
GNEE operates under strict global standards. Our production facilities and products are fully certified:
ISO 9001 Quality Management System.
Compliance with ASTM and EN manufacturing standards.
A complete Mill Test Certificate (MTC) is provided with every shipment, proving the mechanical properties and coating quality.
FAQ
Q1: What is the difference between PE and PVDF coating?
PE (Polyester) is an economical coating suitable for standard residential roofing or interior applications, typically lasting 5 to 10 years outdoors. PVDF (Polyvinylidene Fluoride) is a premium, highly chemical-resistant coating designed for harsh outdoor environments, maintaining its color and finish for 15 to 25 years.
Q2: Can you provide custom colors that are not on the RAL chart?
Yes. If you have a specific brand color or architectural requirement, send us a physical sample piece. Our lab will match the color and send a sample back to you for confirmation before mass production.
Q3: Can I mix different sizes and colors in one shipping container?
Absolutely. This is GNEE's key advantage. You can mix various widths, thicknesses, and colors in a single 20ft container to optimize your inventory.
Ready to upgrade your roofing material supply? Enter your email below to request our full product catalog or ask for a sample Mill Test Certificate (MTC) from our recent shipments. Let us know your requirements, and our team will provide customized roofing aluminum solutions within 24 hours.
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