Prepainted steel coil for roofing

Baiqu Steel Coil Manufacturing Co., Ltd.

Verified Custom manufacturer · 4 yrs ·

China

Customizable Rock-bottom price

$830 1-49 ton Base price

$795 50-99 ton 4.2% off

$775 ≥100 ton 6.6% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 830.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of Prepainted Steel Coil for Roofing

Property	Parameter	Description
Product Name	Prepainted Steel Coil for Roofing	Color-coated galvanized steel coil for roofing applications
Base Material	Hot-Dip Galvanized Steel (SGCC, DX51D, G550)	Multiple substrate grades available
Standard Compliance	ASTM A755, EN 10169, JIS G3312, AS 2728	Meets major international standards
Manufacturing Process	Continuous Coil Coating (Roller Coating)	Two-coat two-bake or three-coat three-bake system
Zinc Coating Weight	Z100 - Z275 (100-275 g/m²)	Zinc layer for base corrosion protection
Total Coil Thickness	0.12 - 1.2 mm	Including base metal and coating layers
Width Range	600 - 1250 mm	Standard and custom widths available
Coil Inner Diameter	508 mm / 610 mm	Standard coil eye dimensions
Coil Weight	3 - 8 tons	Typical coil weight range
Top Coat Thickness	15 - 25 μm	Front surface paint layer
Back Coat Thickness	5 - 15 μm	Reverse side protective coating
Paint Type	PE, SMP, HDP, PVDF	Polyester, Silicon Modified Polyester, High Durability Polyester, Polyvinylidene Fluoride
Pencil Hardness	≥2H (PE/SMP), ≥3H (HDP/PVDF)	Surface hardness per ASTM D3363
Gloss Level (60°)	20-80% adjustable	High gloss, semi-gloss, or matte finish options
Color Options	RAL color chart, custom colors	Wide range including RAL 5015, 3011, 9002, 1015, etc.
Tensile Strength	270 - 550 MPa	Varies by substrate grade (G300-G550)
Yield Strength	205 - 550 MPa	Minimum yield strength per substrate grade
Application	Roofing sheets, wall cladding, corrugated panels	Residential and industrial building envelope systems
Certification	ISO 9001, EN 10204 3.1, SGS, BV	Quality and inspection certifications provided
MOQ	5 tons	Minimum order quantity per color per specification

Prepainted Steel Coil for Roofing | PPGI Wholesale

Prepainted steel coil for roofing is a factory-coated metal substrate that delivers long-lasting weather protection, vibrant color retention, and rapid installation efficiency for residential, commercial, and industrial building projects. Manufactured by applying polyester (PE), silicon-modified polyester (SMP), or polyvinylidene fluoride (PVDF) coatings onto galvanized or galvalume base metal, this product serves as the preferred material for contractors, distributors, and building envelope engineers who demand consistent coating adhesion, uniform thickness tolerance, and reliable corrosion resistance across diverse climatic zones.

What Is Prepainted Steel Coil for Roofing?

Prepainted steel coil for roofing refers to cold-rolled steel strip that undergoes continuous hot-dip galvanizing or aluminum-zinc alloy coating, followed by chemical pretreatment, primer application, and finish-coat baking in a coil coating line (CCL). The result is a ready-to-profile coil that roofing roll-formers can shape directly into corrugated sheets, standing-seam panels, or tile-profile sections without additional on-site painting.

Prepainted Steel Coil Technical Specifications

Our PPGI and PPGL roofing coils comply with ASTM A755/A755M-19, EN 10169:2012+A1:2015, and JIS G3312:2012 requirements. Key parameters include:

Property	Specification
Base Metal Thickness	0.12 mm – 1.20 mm (±0.02 mm tolerance)
Coil Width	600 mm – 1,250 mm
Zinc Coating	Z60 – Z275 (60–275 g/m²) per EN 10346
AZ Coating (Galvalume)	AZ50 – AZ150 (50–150 g/m²)
Top Coat Thickness	15–25 µm (PE), 25–35 µm (SMP/PVDF)
Back Coat Thickness	5–10 µm epoxy primer
Pencil Hardness	≥ 2H (PVDF), ≥ H (PE/SMP)
T-Bend	≤ 2T (PE), ≤ 1T (PVDF) per ASTM D4145
Gloss (60°)	30–80% adjustable per RAL color system
Salt Spray Resistance	≥ 500 hours (PE), ≥ 1,000 hours (PVDF) per ASTM B117

Why Choose Our PPGI Roofing Coils

Mill-direct pricing: Eliminating intermediate traders reduces procurement cost by 8–15% on average order volumes.
Coating line capacity: Annual output exceeds 200,000 metric tons, ensuring stable lead times even during peak construction seasons.
Color matching flexibility: Over 180 RAL and custom colors available, with ΔE ≤ 1.5 color consistency between batches.
Third-party verified quality: Each shipment carries mill test certificates (MTC) referencing EN 10204 Type 3.1 inspection documents.

Frequently Asked Questions

What is the minimum order quantity for prepainted steel coil?

Standard MOQ starts at 25 metric tons per color and thickness combination. Mixed-container orders with 2–3 specifications are accepted for trial shipments.

Do you provide material test certificates for roofing coils?

Yes. Every coil ships with an EN 10204 Type 3.1 MTC covering chemical composition, mechanical properties, coating mass, and paint film test results including adhesion, hardness, and salt spray data.

Prepainted steel coil for roofing supplier

What is the typical delivery time for PPGI coils?

Production lead time ranges from 20 to 30 working days after order confirmation. Stock colors such as RAL 5015, RAL 3011, and RAL 9002 in common gauges can ship within 7–10 days.

Prepainted steel coil for roofing wholesale

Can you supply prepainted steel coil in custom widths or slit strips?

Absolutely. Our slitting line processes coils down to 30 mm strip width with ±0.1 mm tolerance, suitable for roll-forming ridge caps, flashings, and narrow-profile roofing accessories.

Prepainted steel coil for roofing China

Get a Competitive Quote for Prepainted Steel Coil for Roofing

Share your project specifications — including base metal type, coating weight, color code, coil dimensions, and annual volume — and our technical sales team will respond within 12 hours with factory-competitive pricing, coating recommendations, and logistics solutions tailored to your port of destination.

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Robert Brown

United Kingdom

2025-09-04

Acceptable PPGI Quality — Color Deviation on One Coil Resolved

Ordered 28 tons of PE prepainted coil, 0.38mm thickness, 1,050mm width, Z120, RAL 6005 moss green for a school roofing contract in Manchester. Seven of the eight coils matched the RAL reference within ΔE 1.4. One coil measured ΔE 2.1, which was outside the agreed 1.5 tolerance. Raised the issue with documentation and photos — the supplier responded within 24 hours, confirmed the deviation from their own retained sample, and arranged a replacement coil that arrived within 18 days. The replacement coil measured ΔE 1.1. MTC for all coils was complete and accurate. The resolution process was handled professionally, but the initial deviation did cause a two-week delay on our installation schedule. Would consider ordering again given how the issue was managed.

Wei Chen

Singapore

2025-09-18

Solid PPGI Coils for Southeast Asia Distribution

As a regional distributor supplying roofing contractors across Malaysia and Indonesia, we ordered a mixed container of 30 tons covering three specifications: 0.30mm/1,000mm PE Z100, 0.40mm/1,200mm SMP Z180, and 0.50mm/900mm SMP AZ100. The mixed-container arrangement for a trial shipment was handled without issues. Coating adhesion and hardness results in the MTC were within spec for all three grades. One minor point: slit strip widths for the 900mm coil showed ±0.15mm on two coils rather than the ±0.1mm stated — supplier acknowledged this and offered a credit note. Response time from the technical team was within 10 hours for all queries. Overall quality suits our distribution requirements and we are planning a 60-ton follow-up order.

Michael Johnson

United States

2025-10-05

Reliable PPGI Supply for Standing-Seam Roofing Panels

We run a standing-seam panel roll-forming operation in Texas and placed an order for 75 tons of PPGI coil — 0.55mm thickness, 610mm width, PVDF coating, RAL 9002 and RAL 7016 split across two colors. ASTM A755/A755M-19 compliance was confirmed in the MTC. Pencil hardness tested at 2H on both colors. Stock color RAL 9002 shipped within 8 days from inventory; RAL 7016 custom production completed in 23 working days. Both coils ran cleanly through our Bradbury line with no delamination at the seam lock. We have been sourcing from this mill for 14 months across five orders — thickness tolerance has been consistently within ±0.02mm on every heat. Logistics coordination for Houston port was handled efficiently.