Specifying architectural zinc

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Architectural zinc (titanium-zinc alloy, rolled zinc, zinc strip) is a soft, natural-weathering metal that has been used for centuries in various roof applications. Its value reaches far beyond beauty and durability. Following ‘zinc-appropriate’ design, a quality metal roof specification will not follow a standard painted metal specification, but instead cover issues unique to this material. In some cases, prescriptive requirements for the material quality, technical support, panel profile, installer qualifications, and detail quality will be necessary.

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The Benefits of Metal Roofs and Coatings

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Recognized as sustainable, durable building components, metal roofs are used in various applications. The performance of the assembly’s panels depends on the metal substrate, metallic layer, and exterior coating. These are critical to the panel’s weather and corrosion resistance, color retention, and overall longevity.

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Durability of Water-resistive Barriers

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Many new water-resistive barrier (WRB) products are being introduced, including liquid-applied membranes. These new products join traditional wraps, self-adhered membranes, felts, and building paper, making for a crowded marketplace. A WRB will be concealed behind cladding, where it cannot be inspected, maintained, or replaced, so it must last for the design life of the building. However, will the new products be durable?

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