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Sep 26, 2019 · 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 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.

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Substrate: The Galvalume sheet coating consists of an alloy of nominally 55% aluminum, 1.6% silicon, and the balance zinc by weight, as listed in ASTM designation A 792. On a volume basis, the coating is approximately 80% aluminum. The high aluminum content of the coating results in Galvalume sheet having a lower density and less weight per

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Galvalume® vs. Galvanized Metal Roofing: The Differences ...

Sep 26, 2019 · 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 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.

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Substrate: The Galvalume sheet coating consists of an alloy of nominally 55% aluminum, 1.6% silicon, and the balance zinc by weight, as listed in ASTM designation A 792. On a volume basis, the coating is approximately 80% aluminum. The high aluminum content of the coating results in Galvalume sheet having a lower density and less weight per

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Elsewhere, expect air-conditioning bills to go down by 10 to 15 percent. To find roofing with a high level of performance, go to the Cool Roof Rating Council’s database. Look for products with a Solar Reflective Index (SRI) of 29 or more. The higher the SRI, the cooler a roof will stay. Metal Roofing …

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The Metal Roofing Alliance (MRA) recommends a galvanizing thickness level of at least G-90 for residential applications and an AZ-50 or AZ-55 designation for galvalume coatings. In areas by the ...

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Selecting metal panels made from high-quality materials is essential to the longevity and success of your customer’s metal roofing system—from the steel sheets to the fasteners. Although the quality of the paint system applied to metal roofing panels provides an essential level of ... makes Galvalume-coated steel roof panels the most ...

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The Metal Roofing Association (MRA) recommends a galvanizing thickness level of AZ-50 or AZ-55 for galvalume coatings and a minimum of G-90 for residential applications. Aluminum-based panels work better for homes located near oceans.

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Third, metal roof panels have an integral airspace between the metal and the roof deck in the way of ribs. This airspace acts as a thermal break, stopping conductive heat transfer. Common terms used in relation to metal roofing are: Emissivity - Metal roofs can be painted to achieve noteworthy emissivity ratings as high as 90%. Emissivity is a ...