Sorry if this is the wrong forum. Wasn't sure where to put it.
So it's 40C (104F) here the past few days. If often goes up to 48C.
I'm wondering what more I can do to keep my house cool without AC. I have a solar system, it's good but not enough to run AC.
I live in an old stone barn, 2ft thick walls, single storey with a 2-layer terracotta tile roof. Built directly on the bedrock. The sun beats down on the roof all day, so by 4pm I'm suffocating. I spray myself with water and have a standing fan, which is nice, but by 4pm the humidity from all the water I'm spraying, plus me and the dog panting all day adds to the swampiness. The sun doesn't go down until 9pm so there's at least 5 hours of sweltering I have to go through before I can escape outside.
I leave the window and door open all night but it doesn't cool down much. Morning temp outside is 15C, inside it's 25C.
Option 1 is 5cm cork insulation sheets on the ceiling. It's expensive (1200 EU total) but I'm told it's worth it. It will take me until next summer to save up enough.
Option 2 is to knock in another window for ventilation at night. Cheaper by half, but this won't really help me at 4pm though.
Option 3 is to cover the walls outside with clay. But that still leaves the roof to get baked.
Anyone have an opinion on which option will have the most affect? I'll probably end up doing all 3 eventually, but that will take a couple years so I'd like to know which one would be better to do first.
I can't start any of these projects until the winter, so in the meantime, if any of you clever folks have any tricks for how to keep the house cooler during the day I'd really appreciate it.