Galvanized Metal Roof

Galvanized Metal Roof is made of galvanized steel sheet (GI), and the surface hot-dip coating provides excellent rust protection. It is lightweight, high-strength, easy to install, and has a service life of 20-30 years. It is suitable for residential, industrial plants, and agricultural buildings. It is economical and durable, and is a high-quality alternative to traditional tile roofs. Wanzhi Steel provides roof panels with multiple coating qualities, and its thickness, corrugation, wave spacing, and panel width can be customized. Welcome to send us your requirements.

Galvanized Metal Roof

curved zinc roofing sheets

Galvanized Metal Roof Specification

Spangles

Advantages of Galvanized Metal Roofs

• Corrosion resistance: The galvanized layer can effectively isolate the metal substrate from air, moisture, and corrosive substances, significantly extending the service life of the roof, and the maintenance cost is low.
• Durability: The metal material itself has high strength and impact resistance, and the galvanized layer further enhances its durability. It can withstand more severe weather and is not easy to damage.
• Lightweight: The galvanized metal roof is lightweight and has low load requirements on the building structure. It can reduce the cost of structural reinforcement.
• Fire resistance: Metal materials are non-flammable, and galvanized metal roofs will not support combustion or produce toxic smoke in fires, providing higher safety.
• Easy installation: Standardized modular design, high installation efficiency. Its surface is smooth, not easy to accumulate dust, and daily cleaning is simple.
• Aesthetics: A variety of colors and textures are achieved through embossing, coating and other processes to meet the needs of different architectural styles.
• Economic benefits: Low long-term maintenance costs and high comprehensive cost performance. In addition, its energy-saving characteristics can reduce air conditioning energy consumption and further reduce operating costs.

aluminum zinc roofing sheets

Hot-dipped GI Sheets

Types of Wanzhi Galvanized Metal Roofs

Galvanized metal roofs are metal sheets that are coated with a zinc layer and offer a range of significant advantages. By changing the proportion of metal elements in the galvanized layer, zinc, aluminum-zinc, and aluminum-magnesium-zinc roofs can be achieved.

Common Types of Galvanized Roofing Materials

• Galvanized Steel (GI): Standard galvanized steel, Z30-Z275. The zinc layer provides basic corrosion protection with a service life of 20-30 years and is the most economical choice for general climate conditions.
• Galvalume(AZ): 55% aluminum-zinc coating for enhanced durability. AZ50-AZ150, service life is 2-4 times longer than GI, excellent heat reflection performance.
• Zinc Aluminum Magnesium (ZAM): New generation coating (Zn+4-11%Al+2-3%Mg), self-healing properties to prevent cut edges, corrosion resistance 3-6 times higher than GI, service life of more than 40-60 years. Most suitable for coastal/industrial areas with high corrosion risk

galvanized steel surface

galvalume steel surface

ZAM steel surface

Uses

• Industrial and commercial buildings: used for structural roofs of factories and warehouses to facilitate the stacking and transportation of equipment, goods, etc. Used for the roofs of automobile manufacturing plants to provide a stable support structure.
• Architectural decoration: galvanized metal roofs can present rich colors and textures through different surface treatment processes (such as coating, embossing, etc.), meeting the diverse design needs of commercial buildings.
• Agriculture: used in livestock and poultry farms to maintain good sanitary environment and ventilation conditions, and resist severe weather such as strong winds and blizzards.
• Crop warehouses: galvanized metal roofs are used in barns and granaries to prevent crops from moisture, mold, and insect pests. Provide larger storage space and improve space utilization.
• Civil: Emergency housing, temporary residences, and villas use galvanized metal roofs to create a simple and stylish appearance.
• Public facilities: Roofs used for schools, hospitals, stadiums, etc., effectively reduce indoor temperatures, provide protection for the venue, and meet the design requirements of large-span structures.

Wall facade of the viewing room

Factory roof

18-gauge ZAM standing seam roof

Galvanized Steel Roof Production Process

1. Raw material preparation: Select high-quality cold-rolled steel coils (SPCC, DX51D, DX52D) as substrates.
2. Cleaning treatment: Alkaline degreasing to remove surface oil, pickling (hydrochloric acid) to remove iron oxide, water washing, and drying to ensure surface cleanliness.
3. Hot-dip galvanizing: Immerse the steel plate in 450°C molten zinc liquid (zinc purity ≥99.995%), use an air knife to control the thickness of the zinc layer, and naturally cool to form a zinc-iron alloy layer.
4. Post-treatment: Passivation treatment (chromate/chromium-free) to enhance rust resistance, oiling to prevent scratches during transportation; this step can be implemented according to customer requirements.
5. Corrugation forming: Press into a wave shape (common wave height 25-40mm) through a roller press unit, and cut into standard lengths of roof panels (2-12 meters).
6. Quality inspection: zinc layer thickness measurement, surface finish inspection, mechanical properties test (hardness, bending).
7. Packaging and shipment: anti-rust paper wrapping + steel strapping, pallet fixing to prevent deformation during transportation.

Production Video

Galvanized Metal Roof Maintenance

Galvanized Roofing Sheets

Trapezoidal Roofing Sheet

Galvanized Metal Roofing Prices

First of all, the specific price is floating. It is actually determined by factors such as substrate thickness, substrate type, galvanizing process, order quantity, market supply and demand, etc. Due to its weather resistance and excellent durability, it is a little more expensive than ordinary metal materials.

For example, if your use environment has more stringent requirements on the material, then the zinc layer will be thicker and the corresponding price will be slightly higher.

In fact, you’d better contact our online staff at any time and get a free quotation. Because you only need to tell us the purpose, we will recommend the zinc layer thickness for you, if you tell us the quantity, we can give you a free quotation.

Wanzhi Steel Gi Metal Roofing export packaging

Internal packaging of galvanized sheet

Corrugated Galvanized Roof outer packaging

Galvanized metal roof Manufacturer-Wanzhi Steel

Wanzhi Steel galvanized metal roof sets a benchmark with quality and builds a foundation with strong production capacity. The factory is equipped with intelligent production lines with an average daily production capacity of 100 tons. From the zinc layer adhesion process to the sheet forming accuracy, the full-process quality control system ensures that each roof meets the weather resistance standards. Large-scale production reduces costs and increases efficiency, flexible customization responds quickly, and there is no worry from design to delivery. With the strength of “intelligent manufacturing”, we continue to deliver reliable roof solutions for construction projects in more than 120 countries around the world.

If you are also looking for suitable roofing materials for your project, galvanized metal roof is your most suitable choice, welcome to contact us.