Good luck, stranger! :)

I’m curious, what is the construction of an average 70s home in your region?

I don’t believe the government has any running initiatives to improve energy ratings on old houses, but there are certainly standards for new builds like you would have today. Generally speaking, because the summer sun disproportionately heats up our metal roof (and our ceiling cavity is not insulated), it will get to around 2-3 degrees hotter inside than it is outside, if no climate control is used.

The advantage on a sunny winter day, is that it can be 10 degrees outside, and 17 inside if we’re lucky :) (but of course that heat vanishes the moment the sun goes behind the trees.)

Ahh yes, we also suffer from a lack of insulation. Empty ceiling and walls. The 50s was a pretty relaxed era for Australian housing.

This. This is my favourite take on the whole conundrum.

+2 WiFi b&w Brother laser with aftermarket toner, haven’t looked back.