Quote:
Originally Posted by Vancouver_Highrise
I wonder how fast it will take for the white to get dirty, as well as how they will clean it..
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My guess is that it's pretty hard for dirt to find itself half a kilometer from the ground. And if it does, rain would wash it back down because Guangzhou isn't an arid area.
The Burj Dubai got dusty because of the climate there, as it rains less than four inches a year in Dubai and there is plenty of sand and very dry dirt particles that are easy to suspend in air. A little bit of moisture prevents dirt from blowing. Maybe a bigger problem, in this case, is rust. I'm not sure to what extent pollution or smog might stain a surface.
I think it will look about as dirty as the Seattle Space Needle looks, and need to be cleaned about as often as the Space Needle needs to be cleaned.