this post was submitted on 07 Jul 2025
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Solarpunk Urbanism
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A community to discuss solarpunk and other new and alternative urbanisms that seek to break away from our currently ecologically destructive urbanisms.
- Henri Lefebvre, The Right to the City — In brief, the right to the city is the right to the production of a city. The labor of a worker is the source of most of the value of a commodity that is expropriated by the owner. The worker, therefore, has a right to benefit from that value denied to them. In the same way, the urban citizen produces and reproduces the city through their own daily actions. However, the the city is expropriated from the urbanite by the rich and the state. The right to the city is therefore the right to appropriate the city by and for those who make and remake it.
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This has always been one of those, “why the fuck don’t we do this already?” things. Also, NighthawkInLight has a video on how we could make self cooling buildings with infrared cooling paint. https://youtu.be/N3bJnKmeNJY
"It isn't cheap" seems to be the biggest issue. Saw another video that showed it working, but he did say it was pretty expensive for paint.
sorry, I meant why aren't we using white paint. There's no way white paint is expensive compared to black paint.
The infrared cooling paint has other issues, like it doesn't withstand damage easily and the surface texture needs to be maintained very well. But like, white paint is the cheapest kind of paint, just due to commonality.
Alternatively, why aren't we growing plants on all the roofs, that would absorb even more heat without requiring air conditioning, and it would improve air quality, it could be used for farming, etc. Now that one I can understand being more expensive, but you might be able to offset it with sales of whatever you're growing up there, but that's really unlikely. So white paint really seems like a no-brainer.
Editing to add this link from another comment because I had no idea that (of course) there's organized opposition by entrenched interests to prevent anything for the public good https://www.motherjones.com/politics/2025/06/dark-roof-lobby-white-reflective-roofs-laws-lobbying-urban-heat-islands/
I don't think the current roofs are painted black - they're naturally black because roofing tar and asphalt shingles are black by default (a lot of sheet metal roofing is too but you can at least get that in most colors). So it's not a matter of swapping out paint but adding something new. It also adds a new maintenance cost - keeping the white roof clean/maintained. Paint flakes off, tarps etc wear and become tattered, dirt and pollen collect on the surface. None of this is a dealbreaker by any means but our society seems to run on defaults and there's a lot of inertia in construction and a lot of pressure on builders to keep materials costs down (even if doing so costs the owners or occupants more in the long run).
I hope this continues to take off because it really is a big improvement.
Yes EPDM rubber and asphalt are black. They can also just keep using those, just add a layer of white gravel on top, gravel makes the rubber last longer too.