Galvalume Roofing Sheet

The alu-zinc alloy structure of the galvalum steel  plated is composed of 55% aluminum, 43.4% zinc and 1.6% silicon solidified at 600 ℃ high temperature, and its entire structure is made of aluminum-iron-silicon-zinc to form a dense quaternary crystal, Thereby forming a strong and effective barrier to prevent the penetration of corrosion factors.

Galvalume Roofing Sheet For Sale


Effective Coverage Width : 875mm/2.87ft

Expanded Width :1200mm/3.94ft

Plate Thickness :0.14-0.7mm/35-21ga




Effective Coverage Width : 840mm/2.75ft

Expanded Width :1000mm/3.84ft

Plate Thickness :0.14-0.7mm/35-21ga


Effective Coverage Width : 900mm/2.95ft

Expanded Width :1000mm/3.84ft

Plate Thickness :0.14-0.7mm/35-21ga


Effective Coverage Width : 828mm/2.72ft

Expanded Width :1000mm/3.84ft

Plate Thickness :0.14-0.7mm/35-21ga


Effective Coverage Width : 1025mm/3.36ft

Expanded Width :1200mm/3.94ft

Plate Thickness :0.14-0.7mm/35-21ga


Effective Coverage Width : 810mm/2.66ft

Expanded Width :1000mm/3.84ft

Plate Thickness :0.14-0.7mm/35-21ga


Effective Coverage Width : 860mm/2.82ft

Expanded Width :1000mm/3.84ft

Plate Thickness :0.14-0.7mm/35-21ga


Effective Coverage Width : 950mm/3.12ft

Expanded Width :1200mm/3.94ft

Plate Thickness :0.14-0.7mm/35-21ga

Table of Contents

What is Galvalume roof?

Galvalume roofing is similar to Galvanized roofing, but uses a coating combination of zinc, silicon and aluminium to protect the metal rather than only zinc from oxidation. The silicon is added to provide a better coating adhesion to the metal and allowing for a more efficient manufacturing process. The aluminium in Galvalume helps protect the panels much better against corrosion in extreme environments compared to other coatings. Galvalume is a high performing metal option for high temperature, precipitation and marine environments. A Galvalume roofing also provides a smoother and smaller gleams which helps achieve a more uniform design. Due to aluminiums’ qualities Galvalume roofing offers much better surface protection than its Galvanized counterpart, but is more prone to scratches or cut edges. Additionally, the zinc component provides self-regenerating properties against scratches thus preserving the roof’s appearance and prolonging the life of the steel underneath. Galvalume roofs are used in both residential and commercial roof installation projects. They are often found in standing seam types and other profiles from protecting the material of staining caused by bending which is a problem where it enables corrosion in the bends and folds of the piece.

How long will a Galvalume roof last?

Galvalume roofing will last at least 70 years with minimal upkeep. The term “infrastructure sustainability” is becoming important because of a rapid increase in building components around the world in need of major upkeep or replacements. As a result, roof maintenance or replacement materials must last at least 60 to 70 years. For more than 30 years, millions of square ft. of Galvalume roofing have resisted the air conditions to which they are exposed to with little or no upkeep and are well prepared to continue shielding buildings interiors for more than 30 years. Professional project engineering and installation and material science have proven Galvalume roofing on standing-seam roofs will last for that period of time.

Will Galvalume roofing rust?

One of the most popular uses of Galvalume roofing is outdoor paneling. Galvalume is used because it has top of the line resistance in outdoor environments than the regular galvanized roofing. It is able to resist corrosion when exposed to rain, snow and even ice. Galvalume is primarily used to protect iron alloys that are susceptible to rust. Galvalume roofing is better in resisting oxidation than plain steel because the zinc, aluminium and silicon protect the steel. The zinc also will oxidize more easily than the combination with steel it comes into contact with thus making it similar to galvanized steel.

How much does a Galvalume roof cost?

Depending on your preference the quality for the material varies and the lowest cost per square ft. of Galvalume roofing is around $0.73, yet the highest cost is around $7 for a higher quality material. For example a Classic Rib Steel Roof Panel is made of 29 gauge steel and it has a 25 year warranty which is priced at $70 per 100 square ft. There are multiple other choices that are thicker and are more decorative, come with a significant longer warranty and would cost from around $200 to $700 per 100 square ft.

Which is better galvanized roofing or Galvalume roofing?

Galvalume roofing has an advantage over regular galvanized steel, as it has improved safety capabilities. Regularly Galvalume roofing is better over time than galvanized steel, especially when it’s exposed to liquids that can enhance the oxidation process. Galvalume-coated steel would also be less likely to rust after a few decades than regular galvanized steel. Galvalume roofing is not intended for use in alkaline conditions. For Galvalume roofing, the aluminum does not hold well to this kind of setting, so galvanized steel may be a better option in this case. Furthermore, when it is damaged, Galvalume roofing does not do well. When the panel is scratched and indented, galvanized steel may be better suited for roofing.

Galvalume vs. Galvanized Steel Roofing – What’s the Difference?

The difference between Galvalume roofing and Galvanized roofing is that Galvanized roofing is made from a sheet of carbon steel that goes through a hot dipping process in molten zinc. Whereas Galvalume roofing is similar to Galvanized metal but adds silicon and aluminium to the zinc. Both of them go through a similar process of manufacturing, yet Galvalume has a higher cost and is more durable in rainy climates and salty air and comes with a bigger range for cosmetics which makes it more popular. Where Galvanized roofing is most commonly used in agricultural buildings because of lower upkeep costs and where rust is less of a concern.

What is galvalume paint?

Galvalume paint has a distinctive, bright spangled look which is pleasing and has very good protection against the environment. There are various paints recommended if you plan on having a painted on finish on the roofing. There are multiple choices in selecting the kind of paint for different needs. From decoration to making it more durable and make them less sensitive to the sun.

What is Galvalume roofing made of?

Galvalume roofing is made of a carbon steel sheet that goes through a hot dipping process in an aluminium-zinc alloy. The regular process is composed of 55% aluminium and 45% zinc and a small important addition of silicon is added for better coating adhesion to the metal when its drawn, bent or roll formed during fabrication.

How do you clean a Galvalume metal roof?

There are many ways of cleaning your Galvalume metal roof depending on what needs to be cleaned and its severity. But for the safety of the consumer it is recommended that you call in a cleaning service for your metal roof. The most common cleaning is with just plain water which helps wash off dirt, dust and low grade elements. Whereas solvents, detergents and bleach is used for a more thorough cleaning for tougher non-water elements. Keep in mind not to abuse or overuse cleaning agents and know the products that shouldn’t be used on metal roofing for it can weaken the metal and void your warranty.

Does Galvalume roofing reflect heat?

An advantage that Galvalume roofing possess is its ability to reflect sunlight and help reduce the heat absorption, which enhances your energy efficiency in your house or commercial property. Keeping in mind that the aluminium-zinc alloy and silicon don’t add to weight to the material, it offers a very high strength to weight ratio.
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