Is There A Way To Shelter the Rock Climbing Machine?

I have the rock climbing machines in a gym and a house I did. I just had to put the walls on tall. I haven't tried them since Seasons came out. But they were working the last time I checked. I think I read you can have trees in your greenhouse if the walls are on the tallest setting. But if your existing home has shorter walls and you can't change them, maybe you can add a story with a small room and make the wall tall in there for your trees and gym stuff. That's all I can think of. Good luck!