[Jusis follows the man out to the patio first. He sees Zhongli freeze as if he's sensed something within the concrete itself, which he makes a mental note of. It's entirely possible that their new teammate is a highly sensitive Earth user.]

That'll be a very involved process of repair work. Are you able to see if it's near the bathroom? It's possible that the angle is causing problems for that side of the building whenever it rains.

[Of course, this is just a theory, but he's no stranger to this kind of damage leading to other problems. North Carolina's old buildings are great for practicing how to look for it, that's for sure.]