But Galvalume has an excellent performance life in bare exposures as well. In a nutshell, Galvalume is a proven metal roofing material because of its strength, outdoor corrosion resistance and longevity. The coating on Galvalume tends to be thinner than the coating used in galvanizing. 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. The patented Galvalume process invented by Bethlehem Steel in 1972 is similar to galvanization, but also adds aluminum and silicon to the zinc. Because Galvalume Plus can be roll-formed dry without vanishing oil, it is very easy to form and install safely. Galvalume is a brand of metal roofing coated with aluminum and zinc alloy with seems every four feet. Plus, once the red rust starts on a galvanized roof or wall, it will continue to red rust rather quickly. An aluminum, zinc, and silicone coating applied to steel core via hot-dipping process. Design the Best Standing Seam Metal Roof for Your Projects in Asia, Make Sure the Coil and Roll Former are Western Made. In essence, we believe it’s important that you know the different attributes of these two materials so you can make the best choice for your project. These coatings protect the iron in steel from oxidation. Most Galvalume®–like galvanized steel– is coated. But there are methods to minimize the appearance of oil canning, including: Interactions with Other Materials – Combining different metals on a metal roof system can actually lead to interactions that could result in early degradation, staining, and potential failure of a system altogether. The cost of Galvalume and Galvalume Plus are about the same as that of galvanized steel.The coating used on  Galvalume is very important because it is critical to the length and conditions of the entire warranty of the panel product. Bethlehem Steel introduced the Galvalume coating to the construction industry in the early 1970s. One roofing material that stands above the rest for high quality, longevity and durability is galvalume. The only difference is Plus has a thin, clear acrylic coating. Also sold under the trade names Zincalume ® and Galval®, Galvalume® was developed in the early 1970s. This occurrence is a possibility for any kind of metal roofing or walls, including Galvalume. (Note: There is not a substrate or paint warranty on Galvalume products within 1,500 feet of saltwater.). 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. 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. The rust on galvanized will just continue to spread and get worse because it doesn’t have that self-healing property. Galvalume roofing material combines three of the most important metals used in roofing today—steel, aluminum, and zinc. Galvalume has barrier corrosion resistance and heat resistance similar to aluminized material and good bare edge galvanic protection and forming qualities like galvanized material. Galvanizing is an economical and effective anti-corrosion method often used. Home - Galvalume. Major applications are for metal building components, including roofs, side sheets, and structural members. It is a kind of fluoride, a family that includes such well known products as Teflon and Halar. 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. Galvalume may also be referred to as AZ-50 for painted and AZ-55 for unpainted sheet/coil, which refers to the coating weight. Difference between aluminum and galvanized steel is obtained by comparing the properties of both. You also have the option to opt-out of these cookies. The term galvanized means the steel has been coated with a protective layer of zinc to prevent rust and corrosion. This is due in part to the fact that the steel is coated in a thin layer of zinc to prevent rusting. Galvalume is a mixture of zinc and aluminum. Reviews. 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. Galvalume and Galvalume Plus are used in applications that require spot welding, seam welding or arc welding during fabrication. Galvalume performs best when not in contact with copper, bricks, treated lumber, iron, and concrete. 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. Even though Galvalume and galvanized are generally similar in the way they’re created, they have different characteristics that affect how each one should be used in metal roof and wall projects. Galvalume® uses a mixture of aluminum and zinc to protect against rust. 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. This website uses cookies to improve your experience while you navigate through the website. There is one question that comes up more often than others: “What is the difference between Galvalume® and galvanized metal?”. One of the questions most frequently asked by architects is: What are the differences between  Galvalume and Galvanized Steel when used in roofing. 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. 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 roofing material combines three of the most important metals used in roofing today—steel, aluminum, and zinc.Manufacturers begin with a carbon steel base sheet, which is then continuously hot-dipped with aluminum and zinc alloys until it reaches a coating consisting of 55% aluminum… At Sheffield Metals, we are dedicated to providing and educating our customers with the information they need to make the best and most informed decision. And Galvalume offers exceptional heat reflectivity, resulting in lower energy load on buildings and improved interior comfort. Galvalume. Often offered with paint, substrate, and weathertight warranty options and has self-healing properties. Both aluminum and steel gutters resist rust. A measure of the success of this program is the fact that virtually all of the major steel companies worldwide … 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. Galvalume® is a material constructed of steel coated with 55% aluminum and 45% zinc during a continuous hot dipping process. Read on to learn more about galvalume vs galvanized and the benefits of a galvalume roof. Galvanization (or commonly referred to as galvanized) is a protective zinc coating that is applied to a steel or iron substrate through a hot-dip galvanizing process. Average Rating: (based on 1 review) Showing 1 Review: by Brad on 1/22/2013: Pulls so nice! 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. It’s recommended that galvanized roofs are used in drier climates where there is not a nearby coastline, an animal enclosure, or significant air pollution. 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. Both galvanized steel and Galvalume® weigh 100 to 150 pounds per 100 square feet and contain about 35% recycled materials. Aluminum makes up more than 50% of the coating, making it more resistant to corrosion. When zinc is combined with aluminum to form galvalume, it’s even more protective. Galvanized uses zinc only. This category only includes cookies that ensures basic functionalities and security features of the website. Galvanized metal products have been around since the 17th century, but the process of “galvanizing” materials became a wide-spread practice in the early 19th century. Like galvanized products, Galvalume is susceptible to oil … Galvalume refers to a type of proprietary steel coating that consists of about 55% aluminum, 43.4% zinc and 1.6% silicon. 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. Trailer roofs are normally covered with one piece seamless aluminum or metal that is not one piece and is made with other type of metal. Galvalume: An aluminum, zinc, and silicone coating applied to steel core via hot-dipping process. (Note: A small degree of red rusting at cut edges is normal, but with a Galvalume coating, it will eventually stop.). Bethlehem Steel introduced the Galvalume coating to the construction industry in the early 1970s. Research conducted by the Metal Construction Association (MCA) indicates that Galvalume roofing could last as long as 50 to 60+ years without any extreme signs of corrosion. 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. Bare Galvanized and painted Galvanized perform better in this type of environment. However, there are some situations where Galvalume is NOT recommended for use. To this day, Vintage is a popular sheet and coil, especially for architectural applications where an aged metallic look is desired. Contractors, architects, distributors, homeowners – we want to help you with your metal roofing project. Sheffield Metals has the ability to meet a wide array of needs with more than 50 colors continuously stocked. We specialize in providing painted Galvalume® and aluminum for the architecturally driven metal panel industry. Galvalume is aluminum and zinc coated steel. Galvalume® Metal Roofing System Properties. The main difference between galvanizing and Galvalume is that galvalume is a combination of zinc, aluminum, and silicon, while galvanizing is 100% zinc. The one exception is when the coating is penetrated – scratched or chipped by falling or blowing debris, for example. Often offered with paint, substrate, and weathertight warranty options and has self-healing properties. Concrete and mortar are highly alkaline environments. Aluminum is also weather resistant, and can be machined, thinned into wires and sheets or soldered. Comes at a similar price point to Galvalume. If you have any other questions about Galvalume, contact an Englert architectural sales representative near you. Galvalume is the most economical and can be used with any of the three major panel types listed above, however even at 55% aluminum it will still rust if installed within close proximity to salt water. This unique coating protects the steel from corrosion while creating a tough, long-lasting finish. 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. Introduced into the construction marketplace by Bethlehem Steel in 1972 and now widely available around the world, Galvalume ® is carbon steel sheeting coated with aluminum-zinc alloy by a continuous hot-dip process. Aluminized steel is steel that has been hot-dip coated on both sides with aluminium-silicon alloy.This process assures a tight metallurgical bond between the steel sheet and its aluminium coating, producing a material with a unique combination of properties possessed neither by steel nor by aluminium alone. It is mandatory to procure user consent prior to running these cookies on your website. Most galvanized systems have the potential to be unpredictable in specific environments and use, meaning that most manufacturers don’t offer warranties on most galvanized products. If you see there is a dramatic difference in the price of two painted Galvalume panels you are specifying, then the less expensive, less effective  kind of  coating should be suspected. Galvalume is one of the most popular roofing materials on the market today and is a type of steel roof coating made from aluminum, zinc, and silicon. That pretty much summarizes the key features of Galvalume versus Galvanized. Bare Galvalume and coated Galvalume panels will very rapidly deteriorate when exposed to the corrosive agents of animal confinement. Galvalume is a newer type of production steel sheet developed by Bethlehem Steel in 1972. Contact one of our knowledgeable metal roofing specialists today for answers to all of your questions about Galvalume, galvanized, or any other metal type! Before the introduction of Galvalume to the metal roofing industry in the late 20th century, using galvanized sheet and coil was a common practice. It is a visual phenomenon seen as waviness or distortion in the flat surfaces of metal wall and roofing products. That alloy is 45% zinc and 55% aluminum and looks similar to galvanized steel, but the visible crystals are smaller and close together, giving it a smoother appearance. As we mentioned, most manufacturers have stepped toward using Galvalume as the majority of their product offerings because it lasts longer and provides more benefits for property owners. In fact, galvanized products will degrade quicker in these environments, as the corrosion resistance is less than Galvalume. Not self-healing – As we discussed, all steel products inherently have some degree of “edge creep” near cuts and exposed edges of the panels. Durability: Aluminum will not rust or corrode for a very long time, even if you’re right on the coast. However, aluminum also has its downsides, mostly from our point of view as the roofers. Those attributes are the fact it’s lightweight, durable, and will not rust. Consequently, Galvalume  and Galvalume Plus will resist rust, the elements and fire while providing a sturdy and protective covering. Galvanized metal can be used in the same applications as Galvalume, but the most significant thing to keep in mind is that galvanized is a little more challenging to find. 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… Galvanized vs. Galvalume. 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. 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. Price: While more expensive than Galvalume, aluminum roofing is still at a medium price point for metal roofing. Aluminum has three distinct properties which continually make it the top-ranked material for residential gutter systems. These cookies do not store any personal information. There are two types of metallic coatings used: galvanized, which uses 100% Zinc in various thicknesses depending upon the product usage, and Galvalume, a mixture of aluminum and zinc. However, aluminum resists it slightly better than galvanized steel. Often not warrantied due to unpredictability and can develop excessive red rust when core is exposed. First, a little bit of background. These two metals, which are technically coatings applied to a steel core, aren’t all that different from one another by definition. At Sheffield Metals, we carry one product that has a galvanized substrate, Vintage® from Steelscape. Red rust – The zinc coating on galvanized sheet/coil does a good job protecting the steel core for the first decade or so of use. 1565 Views. Galvalume® (AZ) steel is a coated product contains approximately 55 percent aluminum, 43 percent zinc, and 2 percent silicon. 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. Most Galvalume®–like galvanized steel– is coated. Additionally, galvanized metal sheet/coil may also be called G-90, which refers to the coating weight. Like galvanized products, Galvalume is susceptible to oil canning. Pooling water, salt spray, animal manure, and air pollution can quickly corrode galvanized metal. Galvalume is a high-performing metal option for high-temperature, high-precipitation and marine environments. No substrate warranties – Arguably the most significant disadvantage to galvanized metal systems is the fact that the substrate doesn’t have a warranty. Neither Galvalume or galvanized substrate is warranted to be used, in or around animal confinement or agriculture. Gulf Coast goes a step further, using an ultra-fade-resistant PVDF premium paint finish on products such as GulfLok™, GulfSeam™ , … Galvalume steel sheet can be welded similar to other zinc coated sheet products. Depending upon the thickness, color, and quality of the desired Galvalume panels, pricing ranges anywhere from $5.00 to $15.00 per square foot. This superior roofing material, also used as siding, is actually sheets of steel, coated with a composition of 45% zinc and 55% aluminum. What Is Galvalume? However, in the last 20+ years, the pricing of these two materials has fluctuated back and forth, but predictions for November 2019 show galvanized material is about 6% higher in price over Galvalume. Galvalume® may begin to show rust around the edges of the panel before galvanized, but the rust should stop when it comes in contact with the aluminum in the substrate. 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. I've had a trailer without this option and my with. On average, the cost of these specialty materials in comparison to aluminum does not differ all that much. This coating acts as an excellent protection against corrosion. Galvalume® was invented by Bethlehem Steel in 1972. It is a gutter constructed of a steel substrate and coated in mix of 55% aluminum and 45% zinc. Save Saved Removed 0. Galvalume is offered in both bare and pre-coated versions. Oil canning – Like Galvalume, galvanized metal can also develop oil canning in the flat areas of the panel. BIEC International Inc. is the worldwide licensor of the technology and know-how associated with 55% Aluminum-Zinc alloy coated sheet steel (better known as GALVALUME). 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. 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. Rust can still form on the edges, but once the rust makes contact with the aluminum it will stop. Like Galvalume, galvanized products are not suited for use on animal enclosures or in coastal environments. The problem with galvanized metal, painted or not, is that once it starts to red rust, it doesn’t eventually stop as Galvalume does. Due to this composition, it is highly effective in protecting other base metals from corrosion and the elements. most popular materials in today’s roofing market, conditions associated with a coastal environment, buy a weathertight warranty for their Galvalume roofing structure, methods to minimize the appearance of oil canning, galvanized substrate, Vintage® from Steelscape, use the preventative methods outlined in this article, Contact one of our knowledgeable metal roofing specialists today, Commercial buildings – Hospitals, schools, stores, government buildings, and more, Residential projects – Single-family, multi-family, condominiums, and more, Structural/industrial applications – Warehouses, factories, and more, Agricultural – Non-animal confinement spaces, barns, storage, and more, Hiring an experienced contractor who knows the best material handling practices that help reduce oil canning, Using striations or bead stiffeners in the flat area of the panel to minimize the appearance of oil canning. 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