this post was submitted on 02 Feb 2024
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The downside is almost certainly structural (significant weight as well as moisture, and a need for long term structural integrity and safety, likely don't pair well. Especially not when the people doing the building are looking for cost effectiveness).
How heavy do you think plants are ? Heavier than furniture? Or just fat humans ?
Water is heavy, and plants are made of mostly water.
Depends on the plants...
Also... Humans are mostly water as well if you go by that. I know my balcony supports 3,2 (+ the required tolerance) metric Tons of weight on a area of 10 square meters.
I could plant a tree there. Probably more than one. And these building concepts are rather about small plants, so the weight shouldn't be a problem if you build with Reinforced Concrete like a normal person.
Except that plants grow… and grow, and grow. Unless they’re maintained, which takes additional labor and people and infrastructure to handle, all of which adds even more weight.
As said, you don't need to use trees or gigantic plants, use Twiners and shrubs, they cover the whole facade and don't way that much, yet they do the same, if not a better job at keeping the building cool and the air cleaner. They don't need much maintenance and they don't grow indefinitely, if the plant cant reach more facade it stops, only thing is you have to regularly cut the plants around the windows, wich isn't a gigantic problem.