The Long Strip copper roofing system has been used in the UK since 1957, although prior to that it had been widely used on the Continent, particularly in Switzerland and Scandinavia, for many years. The main advantages of Long Strip are the elimination of the many cross welts required with the Traditional methods and considerable scope for prefabrication with on-site machines and mechanised seaming - particularly where anticipated by the roof design. |
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This modern method offers substantial reductions in labour charges and the overall cost of copper roofs, greatly expanding potential applications and building types. An essential feature of this method is the use of a harder temper copper, generally formed into profiled 'trays' and seamed by machine in long lengths up to a nominal maximum of 10m. |
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| This harder copper allows thermal expansion of the bay to be transferred, without buckling, to one or both ends of the bay (depending upon pitch), which is catered for using special details with expansion clips as well as fixed clips.
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In terms of seam type, the double lock standing seam is the most common but for wall claddings and steep roof pitches (above 35°), the angle seam can be used. Long Strip installations look smoother than Traditional, with less prominent seams, reducing the 'quilting' which can occur with the cross-welted Traditional system. |
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