I'm currently trying to reproduce this in Blender:
However, I'm not sure how to proceed with the roof and it's "ripples". I haven't found a proper texture yet and testing with other metal textures doesn't give me the feeling I wanted.
Making many loop cuts might give me a feel but it's also very performance-consuming. Another option could be using a wave texture but I wonder if this is the best solution. What do you guys think?