Manufacturers begin with a carbon steel base sheet that is then continuously hot-dipped with aluminum and zinc alloys until it reaches a coating consisting of 55% aluminum, 43.4% zinc, and 1.6% silicone. This occurrence is a possibility for any kind of metal roofing or walls, including Galvalume. Though once any part of the steel core is exposed, the metal will start to red rust, which is both unsightly and will eat away at the metal over time. One roofing material that stands above the rest for high quality, longevity and durability is galvalume. Galvalume is aluminum and zinc coated steel. The term galvanized means the steel has been coated with a protective layer of zinc to prevent rust and corrosion. Coated metal roof panels have progressed from a single coat straight polyester paint system in the early years to Poly vinyl idene fluoride(PVDF)  acknowledged as the premium resin for coil coatings. However, some people only ask if there is a warranty not how many years the warranty lasts, and most people do not check to make sure that they are not getting the inferior straight polyester system. Galvanizing is an economical and effective anti-corrosion method often used. I explain in greater detail below. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Galvalume’s formula was designed to combine the toughness and strength of zinc with the rust-resistance of aluminum. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Galvalume roofing material combines three of the most important metals used in roofing today—steel, aluminum, and zinc. PVDF resin has superior chalk resistance and gloss retention as well as stain and chemical resistance. When zinc is combined with aluminum to form galvalume, it’s even more protective. It comes up so often, we thought we’d take a few minutes and use this week’s blog to explain those differences. Comes at a similar price point to Galvalume. In general, the 55% aluminum-zinc coating is soft and less conductive when compared with uncoated steel and therefore Current pretreatments and primers along with superior paint coating have increased product warranties dramatically. Gulf Coast goes a step further, using an ultra-fade-resistant PVDF premium paint finish on products such as GulfLok™, GulfSeam™ , … Galvalume systems also often come with paint and substrate warranties that protect your investment and provide peace of mind that the roof or wall system will last. Aluminum is highly resilient against corrosion, making it great for roofs located close to saltwater. Galvalume® is more corrosion-resistant than galvanized steel, but because aluminum provides barrier protection instead of galvanic protection, scratches and cut edges are less protected. In these situations below, the main concern is that the coating will prematurely break down and cause the roof or wall system to fail quicker than if it were not in that location. Bethlehem Steel introduced the Galvalume coating to the construction industry in the early 1970s. These metallic coatings “sacrifice” themselves to protect the iron in steel … However, instead of using pure molten zinc such as in Galvanized steel, Galvalume is created by immersion into a molten mixture of zinc, aluminum, and silicon. Plus, once the red rust starts on a galvanized roof or wall, it will continue to red rust rather quickly. Design the Best Standing Seam Metal Roof for Your Projects in Asia, Make Sure the Coil and Roll Former are Western Made. The underlying steel is coated with a zinc aluminum alloy that combines the long-lasting protection of aluminum with the self-healing properties of zinc. That pretty much summarizes the key features of Galvalume versus Galvanized. Galvalume and Galvalume Plus are used in applications that require spot welding, seam welding or arc welding during fabrication. Bare Galvanized and painted Galvanized perform better in this type of environment. Corrosion resistance – When compared to galvanized metal, Galvalume’s corrosion resistance is about two to four times better. Like galvanized products, Galvalume is susceptible to oil … Galvalume looks quite similar to galvanized steel; however, after closer look one will notice that the surface looks more regular. If Galvalume is in contact with one of these and is then introduced to an electrolyte, such as water, it can lead to galvanic corrosion of the metal. Galvalume has a cousin, Galvalume Plus. Price: While more expensive than Galvalume, aluminum roofing is still at a medium price point for metal roofing. By clicking “Accept”, you consent to the use of ALL the cookies. Oil canning is only an aesthetic concern that does not affect the strength or performance of the system. Most Galvalume®–like galvanized steel– is coated. Galvalume roofing material combines three of the most important metals used in roofing today—steel, aluminum, and zinc. But opting out of some of these cookies may have an effect on your browsing experience. Galvanized vs. Galvalume. Steel exposed by itself without other protective metal coatings such as aluminum or zinc turns a reddish- or yellowish-brown flaky coating of iron oxide that is formed on iron or steel by oxidation, especially in the presence of moisture. Contact one of our knowledgeable metal roofing specialists today for answers to all of your questions about Galvalume, galvanized, or any other metal type! Aluminum has three distinct properties which continually make it the top-ranked material for residential gutter systems. Longevity in the right environment– When galvanized metal roofing or wall systems are installed in the right environment, they’ve been known to last decades. This website uses cookies to improve your experience while you navigate through the website. Plus, commercial property owners have the option to buy a weathertight warranty for their Galvalume roofing structure, which ensures the roof was installed correctly and adheres to strict installation details. Englert’s nationwide team of architectural sales reps spend a considerable amount of time each year counseling architects on which standing seam metal roofing products and profiles might work best for their design projects. Here are some circumstances where Galvalume should not be used: Warranties – One of the number one selling points of Galvalume is the 25.5 year warranty on the substrate, which may be referred to as a perforation warranty. Aluminum is a metal, and it has all the attributes of metal – that are: It is ductile, corrosion resistant, flexible and a good thermal conductor. Necessary cookies are absolutely essential for the website to function properly. What is galvanized steel? It is a visual phenomenon seen as waviness or distortion in the flat surfaces of metal wall and roofing products. The aluminum in Galvalume metal helps to better protect the panels against corrosion in certain environments compared to Galvanized. To reduce the possibility of oil canning, use the preventative methods outlined in this article. The patented Galvalume process invented by Bethlehem Steel in 1972 is similar to galvanization, but also adds aluminum and silicon to the zinc. Aluminum vs Galvanized Steel. It is a kind of fluoride, a family that includes such well known products as Teflon and Halar. I've had a trailer without this option and my with. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. But bare Galvalume and coated Galvalume panels have an outstanding corrosion resistance in a wide variety of general environments, including industrial, marine and even severe marine environments. Details about Galvalume® are This process/product allows for one material to have some of the best characteristics of each metal, which is why it’s become one of the most popular materials in today’s roofing market. Often offered with paint, substrate, and weathertight warranty options and has self-healing properties. These cookies do not store any personal information. Self-healing properties – All steel-based products have some degree of edge creep from the exposed steel when the coil is cut, but it can be offset by hemming or touching up exposed edges with paint pens. As the coating dries, patches of aluminum and zinc molecules coalesce into a pattern across the surface of the sheet. The makeup of the three elements in a Galvalume coating is just over 50% aluminum, just under 50% zinc, with trace amounts of silicon. Bethlehem Steel introduced the Galvalume coating to the construction industry in the early 1970s. Overall, Galvalume is suitable as a roof, wall, trim, accent, and more in most building applications in some of the most extreme environments, including hurricane zones, locations with high rain or snowfall, high-temperature regions, and more. Although this makes it more prone to scratches, the coating is also more flexible, meaning it won’t chip or fall off as quickly wh… Save Saved Removed 0. At Sheffield Metals, we carry one product that has a galvanized substrate, Vintage® from Steelscape. Bare Galvalume and painted Galvalume sheets suffer rapid corrosion when in contact with mortar and concrete. (Note: A small degree of red rusting at cut edges is normal, but with a Galvalume coating, it will eventually stop.). The combination of aluminum and zinc is used once again as a protective layer to the steel. Major applications are for metal building components, including roofs, side sheets, and structural members. The rust on galvanized will just continue to spread and get worse because it doesn’t have that self-healing property. However, the benefits and drawbacks of Galvalume and galvanized metal significantly differ, including how long each one lasts, the expectations of how each one will perform, and more. Galvanized steel is a type of ornamental fencing known for its strength. Average Rating: (based on 1 review) Showing 1 Review: by Brad on 1/22/2013: Pulls so nice! Essentially, it is a thin steel sheet, protected not with pure zinc, but with an alloy containing 55.0% of aluminum, 43.4% of zinc and 1.6% silicon. Like galvanized products, Galvalume is susceptible to oil canning. Economical – For the most part, Galvalume is reasonably priced and one of the most affordable metal materials available for roofing products. These coatings protect the iron in steel from oxidation. However, aluminum also has its downsides, mostly from our point of view as the roofers. The main difference between galvanizing and Galvalume is that galvalume is a combination of zinc, aluminum, and silicon, while galvanizing is 100% zinc. It is a gutter constructed of a steel substrate and coated in mix of 55% aluminum and 45% zinc. Difference between aluminum and galvanized steel is obtained by comparing the properties of both. While our main product focus at Sheffield Metals is painted or bare 24-gauge Galvalume coils and sheets used in the architecturally-driven metal roof and wall industry, we sell galvanized metal products as well. This category only includes cookies that ensures basic functionalities and security features of the website. Sheffield Metals is a leader in the distribution of coated and bare metal products, as well as engineered standing seam metal roof (SSMR) & wall systems. Consequently, Galvalume  and Galvalume Plus will resist rust, the elements and fire while providing a sturdy and protective covering. This coating acts as an excellent protection against corrosion. The coating on Galvalume tends to be thinner than the coating used in galvanizing. One will notice that the steel from oxidation corrosion and the benefits of a roof. Galvalume® uses a mixture of aluminum and zinc alloy with seems every four feet the positive and negative of. 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