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How effective are passive cooling techniques? Which are the cost-effective and easy to use ones in your experience/awareness? (lemmy.ml)

submitted 1 week ago* (last edited 1 week ago) by 1Malayali@lemmy.ml to c/asklemmy@lemmy.ml

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Do things painting the roof white help to reduce the heat in a significant way? Have seen it being mentioned in videos on black vs white coloured cars.

Are there any drawbacks noted by people who tried it for roofs?
Or are there other options that are easier to start with?

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[–] SpruceBringsteen@lemmy.world 6 points 1 week ago (1 children)

https://www.youtube.com/watch?v=36D6CzghGfw

One of the drawbacks he found were moisture problems inside because of the cooler temperatures, but this was in his shed. Though he's testing more than just white paint, he's testing daytime passive radiative paint.

[–] ColeSloth@discuss.tchncs.de 1 points 1 week ago

That's what he is testing in that vid, but you should also mention that he tested the stupidly expensive radiative paint against some paint that he just whipped up himself, and his paint vastly outperforms the special paint he bought.