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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Atlanta is embracing a cheap, effective way to beat urban heat: 'cool roofs' (grist.org)

submitted 3 days ago by SteveKLord@slrpnk.net to c/urbanism@slrpnk.net

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Walk outside into 100-degree heat wearing a black shirt, and you’ll feel a whole lot hotter than if you were wearing white. Now think about your roof: If it’s also dark, it’s soaking up more of the sun’s energy and radiating that heat indoors. If it were a lighter color, it’d be like your home was wearing a giant white shirt all the time.

This is the idea behind the “cool roof.” Last month, Atlanta joined a growing number of American cities requiring that new roofs be more reflective. That significantly reduces temperatures not just in a building, but in the surrounding urban environment. “I really wanted to be able to approach climate change in the city of Atlanta with a diversity of tactics,” said City Council member Liliana Bakhtiari, who authored the bill, “because it’s far easier to change a local climate than it is a global one.”

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[–] JacobCoffinWrites@slrpnk.net 5 points 2 days ago* (last edited 2 days ago) (1 children)

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.

[–] amelore@slrpnk.net 2 points 2 days ago

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.