Galvanized Roofing Sheets 

Galvanized roofing sheets are steel sheets that have been coated with a layer of zinc through the galvanizing process. They are a popular choice in the construction industry due to their durability, cost-effectiveness, and corrosion resistance. The galvanizing process involves hot-dip galvanizing (dipping the steel into molten zinc) or electro galvanizing (applying the zinc using an electric current). The zinc coating acts as a sacrificial layer, protecting the underlying steel from corrosion and extending the life of the roofing material.

Spangle Galvanized Roofing Gi Sheets

galvanized corrugated steel

Wanzhi Steel provides corrugated galvanized metal with zinc coating of Z30-Z275, and additional value-added services such as welding, cutting, perforating, bending, etc. The thickness ranges from 0.13-2.4mm and the width ranges from 600-1500mm for you to choose.

Galvanized roofing sheets Specification

Standard size of galvanized roofing sheet

• 9 waves: 762mm/680,670,660,655,650mm
• 11 waves: 914mm/815,810,790,780mm.
• 12 or 14 waves: 1000mm/930  915,910,905,900,880,875mm.

Galvanized Corrugated Metal Roofing Sheet Tile

heavy hot dipped gi roofing sheet

Gi sheet colour

Common colors are sea blue, white grey, and bright red.

In addition to the commonly mentioned solid color roof, the most popular colors also include printed patterns, such as marble, camouflage, brick, and custom patterns.

Futhuremore, different surface treatment processes can make the galvanised iron sheets look different in texture, such as 3D wood grain roof panels, wrinkle PPGI panels, and orange peel color coated panels.

Most recommended roof panel shapes

Coated Roof Sheet Surface Types

Characteristic

• Corrosion resistance: The zinc coating prevents moisture and oxygen from entering the steel, inhibiting rust. Excellent corrosion resistance.
• Durability: Withstands harsh weather, including wind, snow, rain, and hail, as well as UV exposure.
• Lightweight: Despite their high strength, they are relatively light, making them easy to transport and install. This reduces the load on the building structure.
• Cost-effectiveness: Cheaper than other roofing materials such as aluminum or copper. They have a long service life and low maintenance costs.
• Aesthetics: Different surface treatments, including regular glitter, minimal glitter, and no glitter, can also be painted or coated for visual appeal.
• Portability: They are easy to install and remove, making them a practical choice.

Use

house elevation

Roof Panel Interior Application

• Residential buildings: Roofs and wall coverings.
• Commercial buildings: Roofs of large buildings such as warehouses, factories and shopping centers.
• Agricultural buildings: Barns, silos, and storage shed structures.
• Industrial buildings: Roofs and coverings of factories, workshops and other industrial facilities.
• Temporary structures: Such as construction site offices, event tents and emergency shelters.

Surface Structure Type

Regular Spangle

Regular Spangle corrugated galvanised iron has a characteristic crystal pattern on the surface, which is a result of the hot-dip galvanizing process. This type is often used in general construction.

Minimal Spangle

Minimal Spangle boards have a finer, less noticeable crystal pattern. They are often used in applications that require a smoother surface finish.

No Spangle

No Spangle boards have a uniform, smooth surface without any crystal pattern. These are often used in applications that require a high-quality finish, such as construction projects.

Pre-Painted

Pre-painted galvanized roofing sheets are coated with a layer of paint after the galvanizing process. This provides additional protection against corrosion and enhances aesthetics.

Color Coated

Color coated sheets are available in a variety of colors and finishes that can be customized to suit the design requirements of the building. These sheets are often used in residential and commercial projects.

Large Spangle Galvanized Steel Sheet

ppgi color coated galvanized roof sheet

Gi roofing sheet making machine

Grade of galv roof sheets

G90

G90 is a common grade of galvanised corrugated roofing sheets, indicating a zinc coating weight of 0.90 oz/ft2 (275 g/m2). This grade has excellent corrosion resistance and is widely used in construction.

G185

G185 sheets have a higher zinc coating weight of 1.85 oz/ft2 (564 g/m2) and have enhanced corrosion resistance. They are used in more demanding environments, such as coastal areas.

Z275

Z275 sheets have a zinc coating weight of 275 g/m2, similar to G90, and it complies with the EN 10346 standard. These sheets are commonly used in Europe and other regions to international standards.

G60

G60 sheets have a zinc coating weight of 0.60 oz/ft2 (183 g/m2). These materials are used in less demanding applications where moderate corrosion resistance is sufficient.

gi corrugated sheet

galvanised steel roof sheets

SGCC and SPCC

SGCC is a hot-dip galvanized steel plate with corrosion resistance, suitable for construction, home appliances and other fields.

SPCC is a cold-rolled steel plate with a smooth surface, suitable for scenarios with high formability and high surface quality requirements.

SGCC meaning

A grade in the Japanese Industrial Standard (JIS G 3302), indicating Hot-Dip Galvanized Steel Sheet. It has a zinc layer on the surface and has good corrosion resistance.

• S: Steel.
• G: Galvanized.
• C: Cold Rolled.
• C: Commercial.

SPCC meaning

A grade in the Japanese Industrial Standard (JIS G 3141), indicating Cold Rolled Steel Sheet. There is no zinc coating on the surface and it can be painted and electroplated.

• S: Steel.
• P: Plate.
• C: Cold Rolled.
• C: Commercial.

SGCC vs. SPCC comparison table

SGCC extended grades

• SGCC Z27: The zinc coating weight is 275 g/m² (total weight on both sides).
• SGCC Z18: Galvanized coating weight 180 g/m² (total weight on both sides).
• SGCC Z60: The zinc coating weight is 60 g/m² (total weight on both sides).

SPCC extended grades

• SPCC-SD: Standard surface quality.
• SPCC-SB: High surface quality, suitable for spraying.
• SPCC-SS: Highest surface quality, suitable for electroplating.

Recommended scene selection

Choose SGCC

Corrosion resistance is required (e.g. outdoor buildings, appliance housings) and high surface quality is not required.

Choose SPCC

High surface quality and high formability are required (such as automobile bodies, electrical appliance housings), and subsequent painting or electroplating treatment is required.

galvanized corrugated

Corrugated Galvanized Steel Sheet

Galvanized roofing sheet price

The price of zinc galvanized roofing sheet varies depending on factors such as thickness, width, galvanizing weight, and market conditions. According to the latest data, the price range is $1.50 to $5.00 per square foot. Pre-painted and color-coated sheets are usually more expensive because of the paint application step involved.

Factors affecting the price

• Thickness: Thicker sheets are more expensive because of the increased material cost.
• Galvanizing weight: Sheets with higher galvanizing weight (such as G185) are more expensive, but have better corrosion resistance.
• Surface treatment: The price of pre-painted and color-coated sheets is higher than that of ordinary galvanized sheets.
• Market demand: Prices may fluctuate based on market supply and demand dynamics. For example, galvanized roofing sheet price in nigeria, galvanized roofing sheet price in ghana, gi roofing sheet price in sri lanka are different.

If you want to know the galv corrugated roof sheets price of the day, you can ask our professional technicians.

We use waterproof kraft paper packaging inside and thin metal plate outside, plus 6 pieces of rope to tie it.

Inner waterproof kraft paper packaging

Outer packaging of roof panels

 Cold rolled EGI sheet shipped to India

Galvanised steel roofing Supplier- Wanzhi Steel

Whether you are building a new house, commercial facility, or agricultural shed, galvanized metal roof are a reliable and long-lasting roofing solution.

Wanzhi Steel‘s galvanised roof are made of Q195, and Q235 high-quality carbon steel sheets, using a continuous hot-dip galvanizing process. We specialize in the production of DX51D/DX52D galvanized sheets of ASTM A36 S235 S275 S355. We also have galvanized tin roofing for sale. If you are interested in corrugated galvanised iron sheets, please contact us to learn more.

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