I have roller shutters on my east and west facing windows, and my north facing windows (this is in Australia) get no direct sunlight because they are shaded by

I have roller shutters on my east and west facing windows, and my north facing windows (this is in Australia) get no direct sunlight because they are shaded by my patio. So no direct sunlight is coming into my house through the windows. Still in summer after ~2pm the house heats up. I think overall my house is decently insulated from the sun because in winter my house is extremely cold (what little heat the sun could give doesn't get in to my house). Recently in early spring there were days when the outside air temp was hotter than in my house. I think reducing the absorption of the roof and the walls would help, but even then you have still have a house sitting in 34C+ air temps for at least 10 hours per day, so it gets hot. But when I consider my dads house, which has 2m eaves all around, high ceilings, and massive roof space - it still gets hot. His house might feel nicer without a/c during early summer, but by mid+late summer it is hot too. Maybe better insulated doors+windows would help? My house is double brick walls. Maybe the "outer layer" needs to be able to get hot, and then the "inner layer" insulated from the outer as much as possible. That's a lot of change though. Instead I just run the a/c all day "for free" off my solar panels.