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Thin-film solar is light weight at 2.1–3.1 kg/m 2 (7–10 oz/sq ft). Thin-film solar panels last 10–20 years [16] but have a quicker ROI than traditional solar panels. The metal roofs last 40–70 years before replacement compared to 12–20 years for an asphalt shingle roof. [17]
A copper standing-seam roof with 10-by-10-foot (3 m × 3 m) test panels was subjected to the UL 580, Uplift Resistance Test Protocol. The copper system did not exhibit unusual deformation, the cleats did not loosen from the structural deck, and the system passed UL 580 requirements. UL-90 designation was granted. [58] [59]
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 ...
Building width: 3 m (10' +/-) to 10 m (32' +/-) is common. Width is primarily limited by the capability of the roof panel to support the applied gravity loads (e.g. self-weight, snow) and wind uplift loads. In taller buildings, the wall panel may be a limiting factor to width due to buckling of the unsupported wall panel length.
A study by Ducker International in 2005 identified the average cost per year of a metal roof to be US$3.2 per square metre ($0.30/sq ft) while single-ply roofs stood at $6.1/m 2 ($0.57/sq ft) and built-up roofing at $4.0/m 2 ($0.37/sq ft). [25] Metal roofs are also one of the most environmentally sound roofing options, with most metal roofing ...
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