NonprayingMantis:
to be fair, Auckland houses are NOT designed to withstand any sort of cold weather.
thin wooden walls, no insulation, no heating, HUGE gaps in windows and doors.
So yeah, 6 degrees weather when you live in a house that is warm is nothing.
When you live in a house that is colder than the air outside, not quite so much.
Sounds like a lot of older houses around New Zealand