Typical scenario on a number of buildings: waterblasting upwards

Water blaster – water injector?

NZ Building Code is primarily based on gravity drainage A good example of what you should normally not be doing with a New Zealand building: waterblasting it. Why? Because the NZ Building Code is primarily based on gravity drainage and deflection of water. Consumer NZ warns In that regard an extract from consumer.org.nz: Don’t waterblast…