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2. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   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 ...

3. Metal roof - Wikipedia

   en.wikipedia.org/wiki/Metal_roof

   Standing seam metal roofs can have a lower pitch than asphalt shingle roofs because shingled roofs need a higher pitch to keep the wind from blowing up the shingles and potentially blowing them off in high winds. Standing seam metal roofs come in sheets up to or sometimes more than 30 feet (9.1 m) long and widths of 12, 14, 16 or 18 inches (300 ...

4. Roof seamer - Wikipedia

   en.wikipedia.org/wiki/Roof_seamer

   This shows a cross-section profile of the seam. Mechanically seamed standing seams (double locked) A roof seamer is a portable roll forming machine that is used to install mechanically seamed structural standing-seam metal roof panels, as part of an overall metal construction building envelope system. The machine is small and portable to be ...

5. Copper in architecture - Wikipedia

   en.wikipedia.org/wiki/Copper_in_architecture

   Flat locked and soldered seam roofing systems are typically used on flat or low-pitched roofs. They are also used on curved surfaces such as domes and barrel vaults. Flat seam unsoldered copper roofing is a shingle-like option for high slope applications. Mansard roofs are used on vertical or nearly vertical surfaces. For the most part, these ...

6. Roof - Wikipedia

   en.wikipedia.org/wiki/Roof

   Since then, many types of metal roofing have been developed. Steel shingle or standing-seam roofs last about 50 years or more depending on both the method of installation and the moisture barrier (underlayment) used and are between the cost of shingle roofs and slate roofs.

7. Hemming and seaming - Wikipedia

   en.wikipedia.org/wiki/Hemming_and_seaming

   hemming process A closed hem A seam. Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself, while a seam joins the edges of two materials.