The only one of the three base metals we have looked at that is rust-proof is aluminum. Stainless Steel. Englert . Your email address will not be published. Galvalume vs. Galvanized. You also do not want the fasteners holding your roof on, which may also be galvanized undergoing deterioration. Galvalume sheet is conditionally warranted against rupture, structural failure or perforation due to corrosion for a period of up to 25 years and six months when used for building panel applications. We want something that will last as long as we remain here, so maybe we’ll go with aluminum. In reviewing material submittals we have been given a sample labeled Galvalume Plus which the contractor says is the same as our specification for Zincalume. With Galvanized substrates, the greater the amount of zinc the greater the protection against panel corrosion. The cost of Galvalume and Galvalume Plus are about the same as that of galvanized steel. Which is the best choice for roofing? I suspect not. Be sure to visit Classic Metal Roofs website to see non-rusting roofs made with aluminum for your next architectural “metal” roof. I have a standing seam galvalume roof in Florida that is 20 years old and rusting at the edges. Manufacturing All Metal Works is a locally owned and operated company. Over time, these environmental conditions will break down the coating resulting in panel fade and chalk. I have a choice between painted roofing material and acrylic coated galvalume. Corrugated Metal. The common material of choice for inland metal roofing is a zinc-aluminum coated steel (often referred to by the trade name Galvalume ®). I would also like to know what a "fluoro" finish is. GALVALUME® is the trade name for a patented sheet steel product having a coating of corrosion-resistant aluminum-zinc alloy applied by a continuous hot dipping process. Galvalume/Galvanized Cost - $1.50 to $2.50 Per Sq. Although Galvalume metal and Galvanized metal sound alike, they have quite a few different characteristics and qualities. Aluminum, as you remember, is used to coat steel in the galvanized and galvalume products. Resources “Roof Talk” Blog Product Catalog Brochures Engineering Specs Manuals Product Approvals. Ft. The combination of aluminum and zinc is used once again as a protective layer to the steel. A606 Galvalume® Kynar 500® / SMP. See dealer finish samples for accurate color selections. Exposure testing, however, has proven that Galvalume is up to three times more effective in preventing rust than galvanized steel material. Opinion is mixed from local contractors regarding the appropriateness of galvalume vs aluminum. a pure substance unless otherwise indicated. Both galvanized steel and Galvalume® weigh 100 to 150 pounds per 100 square feet and contain about 35% recycled materials. Just because a warranty has an extended time frame (45 years or even a “lifetime”), it does not necessarily mean that the warranty is better or that the product offers better performance. Do not oil Galvalume Plus. Galvalume vs aluminum Return to Product Selection. Read more. Cal. Between Glavalume® vs. galvanized, which lasts longer? After reading this article, I realize that wouldn’t be a bad idea. AZ-55 Galvalume® is commonly used for bare Galvalume® where AZ-50 is made to be coated with paint such as SMP or Kynar 500®. Both finishes create stunning looks, reinforce metal's strength and add to its longevity. Aluminum for gutters: 0.027" or 0.032" for seamless gutters and any other thickness for custom gutters. It is common for many buildings to use galvalume roofing as an initial cost saving measure. This is not necessarily the case. For long-term customer satisfaction and performance, McElroy Metal recommends panels with a Galvalume® substrate and Kynar 500® (PVDF) coating. Check our website for latest version 10/2019. Research on silicone polyester and acrylic paints vs. Kynar 500 ... Galvalume is a combination of galvanized steel and aluminum. Both Galvalume and Galvanized are good substrates for metal panels. Kynar® Finish vs. We will focus on two widely used base metals used in roofing: steel and aluminum. .032 mill finish or pre-painted aluminum. This would not happen in a Kynar resin paint finished aluminum roof. Steel is a hard, strong, gray or bluish-gray alloy of iron with carbon and usually other elements, used extensively as a structural and fabricating material. The cost for this grade is estimated at $70 per square, which is the same as 100 square feet in layman’s terms. It’s nice to know that aluminum roofing comes with paint finishes and have their own warranties, which makes them durable and still looks good. Galvanized* Galvanized is a Zinc coating that is applied to the steel substrate in a hot dip bath at the steel mill. Unless you have a huge roof the cost is well worth it painted with a standard kynar finish is the best and will last for many years. Required fields are marked *. This topic has been closed by the administrator. Save my name, email, and website in this browser for the next time I comment. The question is would you want to see rust on your home’s roof in the future? I find it interesting that zinc often covers steel to protect this layer from rusting. Warranties for galvalume and galvanized roofing will call out a certain acceptable amount of rust from any edge that is cut within a specified period of time. Unpainted Galvalume vs. galvanized steel exposure over time. High Seams - High seam panels have a greater benefit versus a lower seam panel for moisture penetration. Aluminum is also lighter than steel if weight is a critical factor in determining the roofing material for your project. A606 Galvalume® Kynar 500® / SMP. Q. Zinc: 0.7 mm, 0.8mm and 1.5 mm. The important fact to consider is that a G100 substrate contains 66% more protective zinc than a G60 substrate. Since 1965, Kynar 500 ® resin based finishes have been used as a protective coating on metal architectural building products around the world and is still performing strong today. KYNAR® resin with selected chemicals. Of the three, Kynar 500® (PVDF) coatings provide the best protection against fade and chalk and are proven to provide the best long-term performance. Could you tell me the difference between a "Kynar" finish and a baked enamel finish on an outdoor galvanized sheetmetal panel. Cal. These designations relate to the total amount of zinc contained on both sides of the panel surfaces. In the photo above we are beginning to see the failure of the paint finish along the seam of the bent metal. It is important to note that base metals can be combined, coated, or layered with additional metals in a variety of bonding processes. Bryan Rusch is a partner with Classic Metal Roofs and has worked in the environmental design and architectural field for the past two decades. (Ich bin über 50) Es wird sich während der voraussichtlichen Lebensdauer des Hauses (vermutlich unter 50 Jahren) nicht amortisieren. Aluminum. Contact Us Get a Quote Request Samples Register Your Warranty Roofer Locator Return Policy. 26 & 24 gauge High Quality Galvalume Steel; Available with Aluminum Substrate; Available in Kynar 500 - PVDF Resin Coating; Concealed Screw Fastening w/Clip or Flange; 30 Year Color Fade Warranty; 120 MPH Wind Guarantee; Lifetime Parts & Labor Warranty Written by Bryan Rusch, Partner at Classic Metal Roofs LLC. Consumers often associate warranty with dependability and performance. If you examine the photograph closely, you will see the paint finish has chipped away underneath the drip edge where the steel base metal has begun to deteriorate (rust). Two commonly used Galvanized substrates are designated as G100 and G60. Galvalume vs. Zincalume 2003. Why? The main difference between galvanizing and Galvalume is that galvalume is a combination of zinc, aluminum, and silicon, while galvanizing is 100% zinc. Galvalume is aluminum and zinc coated steel. That is the base metal used for the roof. Aluminum. Death of metal roofing, as we all know, is corrosion. This building was built in two phases, nine years apart. A discussion started in 2008 but continuing through 2019. So if that is true, you will want to choose to have an architectural aluminum roof installed, as aluminum does not rust. Consult your KYNAR® products representative if you have any questions or for more recent results. The performance and long-term service life of a metal panel is widely dependent on two components - the substrate and the coating. Q. As seen above, in less than 10 years the PVDF fade resistance difference is clear. Snap-lock standing seam, utilizing male and female rib configurations. Galvalume vs. Zincalume 2003. To illustrate differences in performance between galvanized and Galvalume steel, let’s consider how these two kinds of steel would perform in an uncoated/unpainted steel roofing application. Galvalume is an engineered coating consisting nominally of 55% Al, 43.5% Zn and 1.5% Silicon. Classic Metal Roofs LLC |. We want to get a new roof for our home, and we want to make sure that it is durable and aesthetically pleasing so that it will still look good even if rains pour down in our area. Warranty on all Kynar 500® coated metal, and a 25-Year Non-Pro Rated Warranty on Acrylic Coated Galvalume. There are a variety of steel substrates and coatings available in the marketplace and the wrong selection could result in disappointment and reduced service life. We are an architecture firm in So. 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