Zinc is an excellent roofing and cladding material which will give long and almost maintenance-free service if installed properly. Proper installation means not only the correct fixing of the zinc itself, but also the correct design and installation of the supporting structure.
In traditional roofing and cladding this structure provides a continuous support for the zinc, whereas in engineered façades, metal railing and point fixing systems are employed. The information provided in this section can be used as a guide to the basics of zinc roof construction. Any relevant national norms and codes of practice in your country or region should be consulted and adhered to.
Traditional systems are fully supported metal coverings that employ tried and tested hard metal seaming techniques which have been used for centuries. The double lock standing seam, batten roll, angle seam and flat lock cladding fall into this category. The complete elZinc® range of finishes can be installed using these systems. They have several characteristics in common.
Panel widths and clip centres in traditional systems
|System dimensioning||Fixing requirement – number of clips per m2/clip centres in cms related to building height|
|8 m < H <= 20 m2 0 a 100 m|
Valid for non-exposed locations.
Various factors affect wind uplift and advice should be sought from elZinc® when determining tray widths for projects in exposed locations. This is not only to ensure that the cladding does not suffer during storms, it is also to avoid fluttering of the trays during periods of continuously windy weather.
Bay widths may be narrowed to the next standard width in order to reduce quilting in the sheets if a flatter appearance to the cladding is required, especially for wall cladding or steeply pitched roofs.