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Standing-seam metal roof with concealed fasteners. Mechanically seamed metal with concealed fasteners contains sealant in seams for use on very low sloped roofs, suitable for roofs of low pitch such as 0.5/12 to 3/12 pitch. Flat-seam metal with or without soldered seams. Steel coated with a coloured alloy of zinc and aluminium. Stone-coated ...
A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope . The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.
Corrugated galvanised iron (CGI) or steel, colloquially corrugated iron (near universal), wriggly tin (taken from UK military slang), pailing (in Caribbean English), corrugated sheet metal (in North America), zinc (in Cyprus and Nigeria) or custom orb / corro sheet (Australia), is a building material composed of sheets of hot-dip galvanised ...
The coil coating process may be used for other substrates such as aluminium, or aluminium, stainless steel or alloy coated steel other than "pure" zinc coated steel. However, only "pure" zinc coated steel is typically referred to as PPGI. For example, PPGL may be used for pre-painted 55%Al/Zn alloy-coated steel (pre-painted GALVALUME(r) steel*)
Metal Building News became the industry's first tabloid-size trade publication when it began publishing in 1980. It is now called Metal Construction News, and in 1985, a second industry magazine began publishing, Metal Architecture. In 1990 MBMA member sales exceeded $1.5 billion and steel shipped was over 1.2 million tons.
The first coated metal roofing tiles to be made in New Zealand were produced by Martile Roofing Ltd in Howick in 1956 and were pressed from an aluminium manganese alloy. They were then coated with High Bake Enamel. By 1957, L.J. Fisher had bought the rights to use the Martile profile from A.L.W. Martinsen and Son Ltd and was producing his own tile.
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