How do you keep concrete house walls from getting too hot in hot climates?
I live in the tropics and my west walls absorb too much heat, poor building design. I live in a condo and would like to put something on the walls inside to keep the heat mostly outside.
There are not a lot of passive heating and cooling solutions that we can recommend once the house is already built unfortunately. The only thing I could think of would unfortunately be on the outside, and that would be to reflect heat so it isn’t absorbed in the first place, either something metallic, or white paint. But if it’s a not a single house then you likely wouldn’t be allowed to do that. Sometimes a creeping ivy on the outside of buildings can help, but that takes a while. The only thing you could put on the inside that would work would be sheets of rigid insulation, that isn’t really much of a solution though. This page may offer you some ideas that may bring you a little respite from the heat –
How to keep homes cool without air conditioning
I’m sure you have come up with your own ways to cope as best as possible, but hopefully there is something on that page that can help a little.