If your home is in technical category 3 and your foundations and home need to be repaired, or substantially rebuilt, you need to consider replacing heavy wall and roof claddings with lighter materials.
MBIE has published technical guidance for foundation repairs and rebuilds for residential properties in Canterbury's green zone foundation technical category 3 (TC3).
In most cases homes with lighter cladding and roofing material performed reasonably well in the Canterbury earthquake sequence. Lighter claddings reduce the weight of your home and the load placed on foundations. They will make your home more resilient in future earthquakes and are likely to be less costly to repair.