Long Length Strip Roof Cladding

Long length roof and wall cladding are roll-formed in longer lengths, generally using the same joining, fixing methods, and installation techniques as traditional roofing or architectural metal panels.

Long strip copper roofing systems have been used in the United Kingdom and Europe for over fifty years, and aluminium have been used in NZ for a similar length of time.

The main advantage of the longer lengths of the system is the elimination of cross welts on sloping roofs and of drips on flat roofs, thus effecting reductions in the labour cost of laying short lengths of metal roof cladding.

The length of individual panels is governed by the type of edge seam, the metal, and the provision for metal expansion of the panel. By using expansion clips incorporated in the standing seams, longitudinal movement of the panels is permitted while still providing a secure fixing to the under-structure.

Roll formed tray roofing panels can be varied in their width to suit the architectural design and the wind design load on the building. They can also be supplied with various upstand heights and details including locking edges similar to secret fixed profiles.

Long strip copper roofing can be laid in continuous lengths of up to 10 m long by 500 mm wide compared to the maximum 1.8 m by 600 mm bays used with traditional annealed panels. Where the rafter length is greater than 10 m, either a step or a cross-welt is required, depending on the roof pitch and the wind design load.