The NZ Metal Roof and Wall Cladding Code of Practice is a comprehensive design & installation guide, and a recognised related document for Acceptable Solution E2/AS1 of the NZ Building Code.
Building owners should be informed of the maintenance required to keep the cladding within the terms of the warranty, and they should be provided with documentary evidence of their obligations. Regular inspection by specialist consultants should be undertaken annually. Records should be kept of all such inspections, which will support any subsequent claims against the manufacturer, supplier or installer. Records will also assist in the process of mediation or arbitration of any such claims.
Without documentary evidence of regular maintenance, any rectification is solely at the discretion of the supplier. Any subsequent work undertaken on the roof cladding by others that do not comply with this Code of Practice will void any warranty.
Inspections and the reports should cover the fixings, gutters, downpipes, flashings and the surface condition of the cladding. The reports should be placed in the 'Building Maintenance Manual', which should contain dated particulars of the original contract, the type of cladding, it's colour and gauge, the warranty, and reference should be made to any leaks reported and repair work or additions carried out. Regular inspection should be regarded as preventative maintenance.