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Galvalume Metal Roof

Galvalume Metal Roof is a form of roofing that uses aluminum-zinc-plated steel sheets as the main material. It has excellent weathering and corrosion resistance, as well as high heat resistance and insulation properties. Aluminum-zinc plating is a corrosion-resistant metal material. Which uses hot-rolled steel sheet as the base material, and is coated with an aluminum-zinc alloy layer on the steel surface by hot-dip plating. Galvalume Metal Roof has huge applications in terms of roof construction, architectural decoration. At WanZhi, we can provide Galvalume Metal Roof in thicknesses of 0.15 – 0.8 mm, widths of 600 mm – 1,250 mm. Which can meet your many requirements. If you’d like to learn about size specifications and other product features, read on!

Galvalume Metal Coil

Galvalume Metal Roof

Galvalume Metal Coil

Galvalume Roof Panels

Specifications of Galvalume Metal Roof

Item Galvalume Metal Roof
Material Galvalume Steel
Thickness 0.15mm-0.8 mm
Overall Width 700mm-1,250 mm
Overall Width 600mm-1,050 mm
Length According to your requests
Coating Composition And Content Aluminum (Al) 55%, zinc (Zn) 43.5%, silicon (Si) 1.5%
Al-Zn Coating Thickness 60 g/㎡-185 g/㎡
Surface Treatment Passivation and fingerprint resistant treatment
Packaging Standard export packaging or as per your request
Galvalume Metal Coil

WanZhi GL Metal Roof Packaging

Galvalume Metal Coil

WanZhi Inner Package

WanZhi GL Mental Roof Process

1. Pre-treatment of steel plates

First, degreasing treatment to remove grease, dust and other impurities from its surface. The process includes acid washing, i.e., the steel plate is immersed into the acid washing solution, to remove the oxides and dirt on the surface by mechanical agitation. Then, it is put into the neutralization tank to neutralize the acid and alkali on the metal surface.

2. Purge

The pre-treated steel plate enters the cleaning tank for deep cleaning to remove residual acids, alkalis and impurities from the surface. Solvents and cleaning agents are added to the cleaning tank. Common solvents are clean water and alcohol, and common cleaning agents are alkaline and acidic cleaning agents. Cleaning time is usually 5-20 minutes.

3. Hot-dip aluminum zinc plating

After cleaning, the steel plate is subjected to hot-dip aluminum-zinc plating. In this process, the steel plate passes through a plating bath filled with molten aluminum-zinc alloy. Through the hot-dip plating process, the aluminum-zinc alloy evenly covers the surface of the steel plate to form a layer of aluminum-zinc alloy plating. This coating significantly improves the corrosion resistance and service life of the steel plate.

Galvalume Metal Coil


Galvalume Metal Coil

WanZhi Impact Test

4. Post-processing

The hot-dip galvalume steel panels will undergo post-processing, including cooling, straightening, cutting and other steps to form galvalume metal roof panels that meet the requirements. Roller cold bending can form Corrugated Roofing Sheet. During this process, the mental sheets are also inspected for quality to ensure that the coating is uniform and defect-free.

WanZhi GL Metal Production Line

No.2 & No.3 Color Coating Lines

How Long Does A Galvalume Metal Roof Last?

Galvalume metal roofs have a relatively long lifespan. In general, if properly installed and maintained, they can last for 20 to 50 years or even longer. However, the specific lifespan depends on various factors, including the quality of the materials, installation techniques, exposure to the elements, maintenance efforts, and environmental conditions. To ensure a longer lifespan, it is important to select high-quality materials and have the roof installed by experienced professionals. Regular maintenance, such as cleaning and repainting, can also extend the roof’s lifespan.

Close View Of GL Mental

WanZhi GI Big Spangle Mental Surface

What Are The Advantages Of Galvalume Metal Roof?

1. Corrosion resistance

Its corrosion resistance mainly benefits from the protective function of aluminum. When zinc is subject to wear, the aluminum forms a dense layer of aluminum oxide, preventing corrosion-resistant materials from further corroding the interior.

2. Heat resistance

Aluminum-zinc alloy steel has good heat resistance and can withstand high temperatures of more than 300 ℃, so it is used in chimney pipes, ovens, luminaires and fluorescent lampshades, etc.

3. Heat reflectivity

Galvalume metal roof has a high heat reflectivity, twice that of galvanized steel roof, so it is often used as a thermal insulation material.

4. Cost-effectiveness

Since the density of 55% AL-Zn is smaller than that of Zn, when the weight is the same and the thickness of the plating layer is the same, the area of the galvalume metal roof is more than 3% larger than that of the galvanized roof sheet.

plain GL mental roof

corrugated metal roof

Where Is Galvalume Mental Roof Used For?

Galvalume metal roofing is a type of metal roofing material that is made from an aluminum-zinc alloy coated steel sheet. Its durability, corrosion resistance, and aesthetic appeal make it a popular choice for various roofing applications.

Application Areas Example Description
Residential Homes Especially in areas with harsh weather conditions. It provides excellent durability and protection against the elements, such as rain, snow, hail, and wind.
Commercial Buildings Including warehouses, factories, and stores, long-lasting and low-maintenance roofing solution that can withstand heavy use and exposure to the elements.
Agricultural Structures  Such as barns, sheds, and greenhouses. It provides a strong and reliable roof.
Industrial Facilities Galvalume metal roofing often used in factories, power plants, and other industrial settings.
Coastal Areas In coastal areas where saltwater and humidity can cause corrosion, Galvalume metal roof can withstand the salty air and moisture without rusting or degrading over time.

GL mental roof

GL mental roof system

Which is the best? Galvalume vs Galvanized vs Aluminum Roofing?

Determining which roofing material is “best” between Galvalume, Galvanized steel, and Aluminum roofing depends on specific needs and preferences. Each material has its own advantages and disadvantages.

Metal Roof Types Capability
Galvalume Mental Roof 1. Combines the corrosion resistance of aluminum with the strength of steel.

2. Offers excellent durability and can resist corrosion even in salty or industrial environments.

3. Maintains its appearance well and resists fading.

4. Its price is higher than the other two metals.

Galvanized Steel Roofing 1. Galvanized steel roofing is coated with a layer of zinc to protect it from corrosion.

2. Available in a wide range of colors and styles.

3. It is generally less expensive than Galvalume but may not offer the same level of corrosion resistance.

4. If your requirements are not particularly demanding, it is recommended to choose Galvanized Roof Sheet.

Aluminum Mental Roofing 1. Aluminum roofing is lightweight and resistant to corrosion.

2. Offers good durability and can withstand extreme weather conditions.

3. It is recyclable, making it an environmentally friendly choice.

4. It is less hard and more prone to dents and scratches than other materials.

Galvalume Mental Roof

Galvanized Mental Roof

What Is Galvalume Metal Roof?

Galvalume metal roofing is a type of roofing sheet made from galvanized steel sheets. Galvalume steel roof combines the advantages of aluminum and zinc. Through hot-dip plating technology, a tightly adherent aluminum-zinc alloy layer is formed on the surface of the steel plate. This alloy is mainly composed of 55% aluminum, 43.4% zinc and 1.6% silicon solidified at a high temperature of 600°C. Its entire structure is composed of aluminum, iron, silicon, and zinc, forming a dense quaternary crystal. It has excellent weather resistance, corrosion resistance and good heat resistance.

How Much Dose Galvalume Mental Roof Cost?

The price of Galvalume Mental Roof ranges from $800 to $1,300 per ton. Depending mainly on the thickness of the aluminum-zinc coating and the price of the substrate, as well as the quantity you order. For large orders we are giving the biggest discount. If you have a project that requires Galvalume Mental Roof, here’s how to calculate the cost:

1. First you need to estimate the number of roofing panels, i.e. how many pieces you will need. Measure the total area of the house. Divide the area of a single roof panel to get the number of sheets needed. Due to the need to overlap the sides of the metal roof. So estimate a ballpark figure as the number of slices you will eventually need.

2. And then calculate how many tons are needed.The most popular sheet thickness of 0.45mm, for example, weighs about 3.53kg per square meter. If the roof length is 10 ft (3m) and the total width is 3.5 ft (1.067m), the weight will be 11.3 kg. So that’s about 88 per ton. If you need 10,000 pieces after the first step of your estimate, then you need to order 10,000/88 = 113.64 tons.

3. Add insome installation costs so you have a rough idea of the cost.

The specific price per ton of Galvalume Mental Roof you can send a request, according to your program, we give you the latest, most cost-effective offer.

Design Model Of GL Mental  Roof

Galvalume Mental Roof

FAQs of WanZhi Galvalume Metal Roof

Q: How do I know if my metal roof is Galvalume?

A: The surface of galvanized sheet is usually silver-white, line pattern, relatively smooth. While  Galvalume mental roof shows a light gray, the surface texture is more delicate, with a certain mirror effect.

Q: What are the top 5 metal roofs?

A: Five of the most common materials used in metal roofing are Galvalume, aluminum, zinc, copper, and stainless steel.

Q: Is it OK to pressure wash a  Galvalume metal roof?

A: It hardly needs cleaning, and if it does.Use the right nozzle, Start with a low pressure setting, Maintain a consistent distance , Avoid harsh chemicals, Rinse thoroughly.

Q:How do you maintain a metal roof?

A: Regular inspection, clean the roof debris, soil, check the drainage system, can be regularly coated maintenance, there is damage in time to repair and replace, timely sweeping guttering.

Q:What is the chemical composition of Galvalume?

A: The chemical composition of Galvalume consists mainly of aluminum, zinc and silicon.

Q: What are the common surface treatments for Galvalume Mental Roof?

A: Dry, Oil, Chromate, AFP/ Galva clean, Non-Gr/Gr-free.


Within our wide range of products we offer a wide range of Galvalume metal roofing sizes, as a recycled material Galvalume metal roof has been used around the world for decades. At WanZhi Steel, we have our own factory with 8 production lines and an annual output of 600,000 tons. You can contact us to ask for price, we will provide you with factory direct selling price. If you would like more details, please contact us today!

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