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Someone put up a tent on their balcony to escape their heat-trapping apartment during the night. (discuss.tchncs.de)
submitted 3 months ago by to c/mildlyinteresting@lemmy.world
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Third extended heat wave within 6 weeks.

The previous one exceeded 40°C, and the buildings not yet had time to completely cool down from that one before the third wave hit.

I was considering putting up a tent in my garden myself, but as I own a ground floor flat, the indoor temperatures did, with the help of some additional cooling measures, thankfully not exceeded 27°C.

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[–] 19 points 3 months ago (7 children)

Where is this? It has outdoor-style shutters and what I suspect are German-style windows behind them.

I love those outdoor shutters. Not only are they great for keeping the heat from getting inside, they also mean you can have a TV in a room with big windows. If you want to watch a dark movie, or any movie that would be ruined if things are too bright, you can also lower the shutters. They'd probably also be good in a violent storm.

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  • [–] [S] 13 points 3 months ago (2 children)

    Spot on, I live in Germany!
    This kind of shutters are standard here and are actually great!
    But during longer heat they still loose most of their advantage, as at some point the heat has just seeped through the massively build outer walls (and stays in the walls for a nice, cozy bedtime temperature of ~30°C on the upper floors...)

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  • [–] 4 points 3 months ago

    Yeah, I lived in Switzerland for a time, and they're pretty normal there too. When it got hot, sometimes I'd throw the windows wide open at night and let the place cool down to 20ish. Then, around 9am I'd shut all the windows and shades. I was also lucky because I had windows on opposite sides of the apartment, so I had good cross ventilation to blow the heat out.

    When I'd come home it would be low-20s or mid-20s inside, while outside it was above 30. But, like you said, if the heat wave lasted too long, the concrete would heat up. I'd still throw open the windows at night, but once the concrete of the building was up to about 30 degrees, even if it dropped below 20 at night, it would still be 25ish indoors in the morning.

    At that point, when it was 25ish indoors, below 25 outside (but heating up) and 30ish degrees in the walls, I wasn't sure if it was smarter to shut everything and try to keep the warm air out, or open things and hope that the ventilation allowed the concrete to cool.

    Also, at night even though cross-ventilation was a good plan, and it cooled things off, I lived in a loud neighbourhood (by Swiss standards) and it was so much easier to sleep with the windows shut. Those windows reduce the noise from outside so much.

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  • [–] 3 points 3 months ago*

    You can kinda do some managing of when the shutters are open, half-open or closed as well as when the windows behind them are open or closed, to keep heating from sunlight outside and tilt air-circulation in favor of the colder hours but, yeah, eventually even that is fighting the wall of the building itself having warmed up.

    Here in Portugal (were that kind of shutters are also very common) I did manage to, for most days of the one 40C+ heatwave we had, keep the indoor temperature below 30C, though it still creeped up (no doubt due to exactly that effect you mentioned of the building walls heating up) and after some days I actually had to use a fan to help air-circulation with the outside during early-morning and night when the air outside was colder.

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